CN1800882A - Optical module - Google Patents
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- CN1800882A CN1800882A CN200610003625.9A CN200610003625A CN1800882A CN 1800882 A CN1800882 A CN 1800882A CN 200610003625 A CN200610003625 A CN 200610003625A CN 1800882 A CN1800882 A CN 1800882A
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Abstract
An optical module according to the invention can achieve an optical system using a transmission-type diffraction grating for bending the optical path of incident light with a specific wavelength by about 90 DEG . A substrate of the transmission-type diffraction grating is mounted at an angle in a range of +-5 DEG with respect to the design incident angle alpha of the incident light. The optical system can be applied to a light multiplexing/demultiplexing module.
Description
Technical field
Present invention relates in general to a kind of optics module that is used for Wave division multiplexing optical communication technical field and spectral technique field.The optical path that one aspect of the present invention relates in a kind of optics module changes optical system.In addition, another aspect of the present invention relates to a kind of mechanism of closing the optical element of learning module that is used to keep constituting.
Background technology
On the other hand, in the spectral technique field, diffraction grating is widely used in the spectrum of analyzing light in the spectroscopy equipment.Spectral analysis need high-level efficiency be used energy in broadband.Reflection-type diffraction grating is applicable to the high-diffraction efficiency that obtains in the broadband.Because reflection-type diffraction grating has the change ratio of angle of diffraction and wavelength of light preferably, that is to say, wavelength angle distribution character is fine (for example, referring to Tadao Tsuruta, " applied optics 1 " Baifukan Co.Ltd, 1990, p.307), so reflection-type diffraction grating is widely used in the spectroscopy equipment.
In fields such as environment measurement, increase gradually especially for the demand that can be carried to the small-sized spectroscopy equipment that also can measure at the scene the working site.Proposed by utilizing the spectrum of liquid, be used for measuring the spectrum of liquid flow or measuring several Miniature Sensors, and small-sized spectroscopy equipment be used for the environment measurement field as the character of the pH value of liquid at small fluid path.
Be used for the small-sized spectroscopy equipment of these purposes equally, reflection-type diffraction grating as the spectral distribution element to use with the same manner according to the large-scale spectroscopy equipment of correlative technology field.On the whole, catoptron etc. is used to design optical system and reduces with the size that realizes the spectral distribution function.
Diffraction grating also is used in the optical demultiplexer (demultiplexer) in Wave division multiplexing optical communication field.The optical axial that is used to calibrate the optical axial of incident light and diffraction light when reflection-type diffraction grating is near point-blank the time, that is to say, when forming the optical system of so-called Littrow setting (Littrow), (for example can obtain small-sized light demultiplexing module, open referring to international monopoly, the No.99/46638 instructions).
Yet reflection-type diffraction grating has the characteristic that the position relation between incident light and the diffraction light changes sensitively according to the established angle of diffraction grating.For example, as shown in figure 16, incident light 402 scioptics 430 that comprise wavelength components λ 1, λ 2 and λ 3 are calibrated to directional light wire harness 404, then, are incident on the reflection-type diffraction grating 410.Light shafts by diffraction grating 410 according to wavelength with different outward direction diffraction.For example, the angle (angle of diffraction) of the diffraction light wire harness composition of wavelength X 2 between the optic axis 407 of diffraction light wire harness composition and the perpendicular line 405 of drawing from the substrate 412 of diffraction light wire harness is the direction output of β 2.Diffracted ray is converted into so that be incident on the element 420-2, on the photodetector as diffracted ray pick-up unit 420.
Angle (incident angle) α between the optic axis 403 of incident ray and the perpendicular line 405 of drawing from diffraction light wire harness substrate 412 is when this situation changes, and the angle between the optic axis 403 of incident ray and the optic axis 407 of diffracted ray (being used for having in the aforementioned embodiment the angle γ 2 of the diffracted ray of wavelength X 2) also changes.Therefore, need the strict established angle of regulating the relative incident ray of diffraction grating, and the strict installation site of regulating the diffracted ray pick-up unit.But its problem is to be difficult to assembling optics module.
Equally owing to this reason, in the optics module that uses reflection-type diffraction grating, the complex mechanism that is used for regulating each part position need be arranged on the housing of module, or needs to preserve in advance the bonding/fixed space that is used for holding element.Therefore, its problem has been to increase the size of using optics module equipment.
For the optoelectronics field, the development of technology has been brought up to and has been used for part more between the changing device or have an electronic signal transmission/signal Processing of optical signal transmission/treating apparatus.Intermediate conversion device between this Technology Need optical signalling and the electronic signal and be respectively applied for transmission and the signal of processing optical signals and electronic signal transmission and treating apparatus.Therefore, if producing the optical element and the electronic component mixing of these functions is installed on the plank, so that optical signalling and electronic signal both can transmission on same plank, processing and intermediate conversion, then can have many advantages, as the improvement of signal Processing efficient and the minimizing of plant bulk.Mix on the so-called optical/electrical mixed mounting plate of installing at optical element and electronic component, following optical system need be provided, wherein by this Guan Xue system, in light pipe such as optical fiber, optical waveguides etc., propagate, or the light of propagating in the space can receive by being fixed on the automatically controlled survey element of light sheets in the plate, or can be issued to light pipe or main on the spatial light path of conversion portion between optical signalling and the electronic signal from the light that sheet light radiated element emission onboard is installed.
Preferably, from making things convenient for the viewpoint of layout and little installing space, optical fiber, optical waveguides and space optics path are set to so that its optic axis is parallel to plate.On the other hand, the optical element that is used for carrying out intermediate conversion between optical signalling and electronic signal is mounted onboard.Therefore, in optical system with this optics setting, the preferred use has the incident that is parallel to the plate surface and the so-called platy optical element of output surface, so that be parallel to crooked 90 ° of the optical path of plate, so that vertically be connected to the platy optical element that is installed on the described plate.
Though being used to change the angle of optical path can be for acute angle or be not 90 ° obtuse angle, because incide the incident of optical element or have the pitch angle, so this kind situation is brought the efficient of regulating and the situation of difficulty of reducing from the output of optical element.If light will impinge perpendicularly on the optical element or from optical element and send, because the optical path of propagating light can not be parallel with the plank surface, so will increase the complicacy of apparatus structure and increase device size.
Yet, do not need accurately to regulate optical path and change angle to 90 °.Even select far to depart under the situation of angle as the bending angle of design in 90 ° of several years, if the mounting structure of each optical element designs according to described angle, then foregoing problems can not become such actual conditions yet.In the following description, " 90 ° optical paths change " mean that the optical path near 90 ° that comprises with the variation of this several years width changes.
When the reflex time that uses light, can realize that 90 ° of optical paths change.On the whole, can realize (for example, referring to Jap.P. publication number No.2004-85913A) by using level crossing or prism.
In the optical/electrical mixed mounting plate, because the area on the Photoelectric Detection surface of the core diameter of the light shafts diameter that will use, the light pipe that will connect, light sheets electrical detecting element etc. is very little, so the difference a little of optical path will produce very big light losing.For this reason, the angle or the plane precision that are used for established angle, reflecting surface all need higher degree of accuracy, change so that realize 90 ° of optical paths.This just the problem of complicated assembling of needs or manufacture process occurred.
Summary of the invention
The object of the present invention is to provide the method that addresses these problems.One of purpose of the present invention is to provide a kind of optics module, because it does not need to provide the correcting mechanism of any complexity, reduces the size of optics module so it is easy to assemble.
More particularly, the present invention relates to provide a kind of optics module, wherein the mechanical precision that changes in the optical system of 90 ° of optical paths can make assembling process simple.
In order to address the above problem, an aspect of of the present present invention provides a kind of optics module, comprises using diffraction optical element to be used for the about 90 ° optical system of optic axis that bending has the incident light wire harness of specific wavelength.Preferred transmission type diffraction grating is as diffraction optical element.If it is wavelength is specific, then, easier than passing through reflection curved optical path by diffraction curved optical path for installing and assembling.
In optimal way, the groove number N in the transmission-type diffraction grating that use is set at the value by formulate:
N＝±(cosα+sinα)/(mλ)
Wherein ± be incident on when using under the condition on the transmission-type diffraction grating symbol identical with incident angle α for have the incident ray that is included in the wavelength X of importing from the light input media when the light shafts (m is an integer) of m progression (mth-order) diffraction with the symbol of m.When the diffraction grating of this relation is satisfied in use, can form optical system, wherein the light of diffraction is relatively with about 90 ° of the bending of light of 45 ° of incident angle incidents of the m progression of groove.That is, when the light shafts with wavelength X were incident on the transmission-type diffraction grating with incident angle α, the output of transmission-type diffraction grating had the diffraction light wire harness that optical path changes 90 ° m progression.
In optimal way, the substrate of transmission-type diffraction grating is installed in the angle of α ± 5 ° scope with relative incident light wire harness.In the time of in diffraction grating is installed in this angular range, can provide optics module with low loss.
In the optics module, the substrate of transmission-type diffraction grating is installed in the angle of α+Δ θ scope with relative incident light wire harness, and the light shafts by transmission-type diffraction grating diffraction are assembled by the lens with focal length f, have on the photoelectric detector on Photoelectric Detection surface of width W so that be incident on to have along the direction of incident light wire harness.In addition, satisfy following relation:
tan|Δθ|≤W/(2f)
Under the condition of the photoelectric detector on the Photoelectric Detection surface that has width W in use, when diffraction grating is installed in this angular range, can provide to have low-loss optics module.
Except said structure, optics module according to the present invention also comprises: the light input media, and it is used for making the light shafts with multiplexed wavelength to be incident on the transmission-type diffraction grating of one of described wavelength of use as specific wavelength; And a plurality of photoelectric detectors, it is used to receive wherein each all has by the transmission-type diffraction grating and carries out demultiplexing and from each light shafts of the single wavelength of transmission-type diffraction grating output.By this structure, can form easy assembling and undersized demultiplexing module.
In optimal way, the described light input media that is used to light shafts are incided on the transmission-type diffraction grating is optical fiber or waveguide, and it is fixed into so that its optic axis is parallel with described plate; The transmission-type diffraction grating is fixed as when inciding on the transmission-type diffraction grating with convenient light shafts, and the light shafts with specific wavelength are being exported near the direction perpendicular to plate; And to be used to receive the photoelectric detector that all has various light shafts of single wavelength from each of transmission-type diffraction grating output be a plurality of light sheets electrical detecting elements, and it is parallel to optic axis and is arranged on wherein each and all has from the light shafts of the single wavelength of transmission-type diffraction grating output and reach each position of substrate.When using this to constitute part, can provide easy assembling and undersized demultiplexing module.
Optics module according to the present invention also comprises: a plurality of light launchers that are used to launch the light shafts with different wave length; And photoelectric detector, it is used to receive the light shafts that have from the multiplexed wavelength of transmission-type diffraction grating output, so that it is multiplexed that the light shafts that send from a plurality of light launchers are undertaken by the transmission-type diffraction grating, wherein said specific wavelength is one of in the wavelength.By this structure, can form easy assembling and undersized multiplexed module.
Optics module according to the present invention also comprises: be used for making in predetermined wavelength range the light shafts with continuous wavelength spectrum to incide light input media on the transmission-type diffraction grating; And be used to receive have and carry out spectral distribution and from the photoelectric detector of the light shafts of the predetermined wavelength of transmission-type diffraction grating output, wherein specific wavelength is arranged in the predetermined wavelength range of incident light wire harness by the transmission-type diffraction grating.When using this to constitute part, can provide easy assembling and undersized spectral distribution module.
In optimal way, optics module according to the present invention also comprises and is used to calibrate the collimator that incides the light shafts on the diffraction optical element in fact.In optimal way, optics module according to the present invention also comprises the convergence apparatus that is used to assemble from the light shafts of diffraction optical element output.
The structure of above aspect according to the present invention is compared with the situation of using level crossing, and relax requirements is used for the degree of accuracy of element established angle greatly.Therefore, can simplify assembling process.
When a plurality of incident wavelength was provided, demultiplexing and optical path changed both and can carry out simultaneously.Therefore, spectral distribution element and level crossing can be combined into one so that reduce the quantity of part.
Another aspect of the present invention provides a kind of optics module that uses diffraction grating, comprising:
The first cylinder keeper with first hollow parts;
The second cylinder keeper with second hollow parts;
Be arranged on the diffraction grating between the first and second cylinder keepers;
Keep so that first hollow parts forms the light input media of the optical path of incident ray by first keeper in first hollow parts;
Be connected to the end parts of second keeper relative so that the hollow parts of second keeper forms the diffracted ray pick-up unit of the optical path of diffracted ray with diffraction grating;
Wherein diffraction grating is fixed as so that on the plane of light incidence of the diffraction grating adjacency end parts of first keeper, and the light output face of diffraction grating is on the end parts of second keeper.
In optimal way, can use the transmission-type diffraction grating.Because the use of transmission-type diffraction grating can allow according to the established angle minimizing incident ray of diffraction grating and the change ratio in the angular dependence between the diffracted ray, it does not need strict angle of regulating diffraction grating.In addition, because diffraction grating keeps by mechanical clamp, so, can omit diffraction grating, the described diffraction grating of calibration and bonding any complicated position fixing process that diffraction grating is installed.
In optimal way, angle between axle side's direction of the cylinder of the end surfaces of the end parts of first keeper of adjacency diffraction grating and first keeper, and in abutting connection with the angle between the axial direction of the cylinder of the end surfaces of the end parts of second keeper of diffraction grating and second keeper and be set in the scope at angle between incident ray and the diffracted ray.According to this structure, when the transmission-type diffraction grating is placed between two keepers fixedly the time, can obtain the spectrometer optical system, wherein incident ray and diffracted ray are crooked at a predetermined angle each other.
In optimal way, the light input media comprises collimator.Because be provided with collimator, so disperse in use under the situation of light source, light can be calibrated to directional light wire harness in the module by collimator, so that incide on the diffraction grating.
In optimal way, second keeper keeps convergence apparatus in its hollow parts.Because be provided with convergence apparatus, thus diffracted ray can be focused in the module by convergence apparatus so that incide effectively on the diffracted ray pick-up unit.
In optimal way, first keeper has the mechanism that is used to regulate collimator.According to this structure, can regulate along being parallel and perpendicular to the position and the angle of optic axis, and not increase any calibration or bonding/installing space in the housing of combination optical module wherein.Can realize greatly reducing the purpose of optical mode packet size.
In optimal way, the coupling part between second keeper and the diffracted ray pick-up unit is coupled to fabricated section, is used to keep the diffracted ray pick-up unit, so that the coupling part can rotate around optic axis.According to this structure, can carry out position adjustments around the sense of rotation of optic axis, and not increase any calibration or bonding/installing space in the housing of combination optical module wherein.Can realize greatly reducing the purpose of optical mode packet size.
In optimal way, the light input media has optical fiber and plane-convex lens.Or the light input media has optical fiber and classification index lever lens (graded index rod lens).When using these constituent parts, can form with keeper is the collimator of one.
In optimal way, convergence apparatus is a plane-convex lens.Using of this constituent part can provide and the collimator of keeper as one.
In optimal way, the diffracted ray pick-up unit is a photodetector array.The use of this constituent part can reduce the size of optics module, thereby can finish the spectral distribution effect in the optics module.
According to structure of the present invention, a kind of optics module can be provided, wherein can only there be very complicated adjusting of the installation site of original diffraction grating just can locate and install diffraction grating by mechanical compounding practice.
In addition, because made up the mechanism that is used to calibrate the diffraction grating pick-up unit, so, can greatly simplify assembling process.
In addition, because do not need to be provided with separately any bonding/fixed space in any special optical element detent mechanism or the optical mode assembly housing, so, can realize greatly reducing the purpose of optical mode packet size.
Description of drawings
Fig. 1 shows that 90 ° of optical paths according to the present invention change the view of optical system;
Fig. 2 is the zoomed-in view that shows the major part of optical system according to the present invention;
Fig. 3 is the view that shows the fundamental optical system of optics module according to the present invention;
Fig. 4 is the curve map that shows the permissible error of diffraction grating or level crossing established angle;
Fig. 5 shows the view that is used to illustrate the fundamental optical system of another optics module according to the present invention;
Fig. 6 is the curve map that shows feature difference between transmission-type diffraction grating and the reflection-type diffraction grating;
Fig. 7 shows to use the topology view that changes the light demultiplexing module of optical system according to 90 ° of optical paths of the embodiment of the invention 1;
Fig. 8 shows to use the topology view that changes the light demultiplexing module of optical system according to 90 ° of optical paths of the embodiment of the invention 2;
Fig. 9 is the cross section view that shows the embodiment of the embodiment 3 of optics module according to the present invention;
Figure 10 is the cross section view that shows the embodiment 3 of optics module according to the present invention;
Figure 11 A and 11B are the cross section view of demonstration according to the structure of the collimator keeper of embodiment 3;
Figure 12 A and 12B are the cross section views that shows according to the structure of the convergent lens keeper of embodiment 3 and photoelectric detector keeper;
Figure 13 shows the view be used for illustrating according to the optical system of the periphery of the diffraction grating of the optics module of embodiment 3;
Figure 14 shows the view that changes optical system according to 90 ° of optical paths of correlative technology field;
Figure 15 is the zoomed-in view of demonstration according to the major part of the optical system of correlative technology field; And
Figure 16 shows to be used to illustrate the view of use according to the spectrometer optical system of the reflection-type diffraction grating of correlative technology field.
Embodiment
Fig. 1 is the view that shows according to the basic structure of embodiment of the present invention.In the present invention, diffraction optical element is used to change optical path.In the embodiment shown in fig. 1, the transmission-type diffraction grating 10 with the periodic grooves (grid) 14 that is formed on the sheet transparency carrier 12 is used for as diffraction optical element.
Under the situation of diffraction grating, the incident angle α at angle between the perpendicular line 1 of drawing as incident light wire harness 50 with from the diffraction grating substrate surface, and output angle (angle of diffraction) β at angle has the relation of representing by following formula between the perpendicular line 1 of drawing as output light shafts (diffraction light wire harness) 52 with from the diffraction grating substrate surface:
sinβ＝sinα+Nmλ (1)
Wherein N is the groove number in the diffraction grating, and m is the progression of diffraction, and λ is the wavelength of incident light wire harness.
In order to change 90 ° of optical paths, need satisfy the relation that following formula is represented:
α+|β|＝90° (2)
Because expression formula (2) can use sin β=-cos α replaces, so, bring this relation into expression formula (1) so that the groove number N in the diffraction grating can provide by following formula:
N=-(cos α+sin α)/(m λ) (3) that is to say, if the progression m of the diffraction wavelength of incident angle α, specific wavelength λ and use provides according to design load, then the groove number in the diffraction grating can be determined according to expression formula (3).For example, when the incident light wire harness need ° incide on the Difraction surface side of transmission-type diffraction grating with incident angle α=45, the diffraction light wire harness of negative first progression can be from the rear surface of substrate extracts during with angle of diffraction β=-45 °, thereby changes if realize 90 ° of optical paths that the diffraction grating that uses has a number of the groove that expression formula represents.
On the other hand, Figure 14 has shown 90 ° of optical systems with the correlative technology field of the light shafts 454 of acquisition reflection of optical path of using level crossing 440 to be used for crooked incident light wire harness 450.Under the situation of level crossing, need condition α=β=45 ° to be used to realize that 90 ° of optical paths change.
In order to realize above-mentioned optical system, the direction that needs relative incident light wire harness is with angle [alpha] accurately fixed diffraction grating substrate or level crossing.Consider the situation of established angle displacement Δ θ now.
Under the situation of diffraction grating, when the incident angle α of incident light wire harness 50 changed to α shown in Figure 2+Δ θ, the value that the output angle β ' change expression formula (1) of diffraction light wire harness 52 provides that is to say, according to following formula (5):
sinβ′＝sin(α+Δθ)+Nmλ (5)
Table 1 has shown the angle between incident angle α+Δ θ, output angle β ' and incident light wire harness and the output light shafts, and when element established angle displacement Δ θ, it calculates by expression formula (5).
By the way, the groove number N in the diffraction grating 10 is set at 900 of every mm, and the alignment light wire harness that will have wavelength X=1570nm is as the incident light wire harness.In the case, if α=| β |=45 °, the then negative first progression diffracted ray bundle (m=-1) satisfies expression formula (4).Under the situation of this diffraction grating, can find that even 3 ° of established angle displacements, optical path changes also can keep 90 °.That is to say that when established angle was in angular extensions alpha ± 3 °, β ' can keep near equaling β-Δ θ.If bending angle allows in 90 ° 4 ± 2 °, then established angle can allow in α ± 5 °.
On the other hand, as shown in figure 15, under the situation of level crossing, when the optic axis of the relative incident light wire harness of established angle during, that is to say, when established angle changes to 45 °+Δ θ from 45 ° of displacement Δ θ, reflection angle from 45 ° of displacement Δ θ, that is to say that also reflection angle also changes to 45 °+Δ θ.As a result, the angle between incident light wire harness and the output light shafts is from 90 ° of displacements, 2 Δ θ.Table 2 has shown the numerical value of the level crossing that calculates at the same manner with the diffraction grating situation that is used for comparison.Can find that when Δ θ equaled 3 °, the quantity of optical path was indexed to 96 °.
In optics module according to the present invention, crooked 90 ° light shafts incide on the photoelectric detector 20.Photoelectric detector 20 can be photoelectric detector, and for example photodiode maybe can be optical fiber.Because incide crooked 90 ° of light shafts on the diffraction grating with incident angle α, so the Photoelectric Detection surface of each photoelectric detector can be arranged on the position of diffraction light wire harness incident.
If Z is the distance from diffraction grating or level crossing to the Photoelectric Detection surface of photoelectric detector 20.For example, when Z equaled 3mm, under the situation of diffraction grating, optic axis can be ignored at the displacement θ of the relative established angle of Photoelectric Detection lip-deep position displacement Δ x, but was issued to 315 μ m in the situation of level crossing.From then on the result can clearly find out, the error in the permission established angle error ratio level crossing in the diffraction grating is a lot of greatly.
Allow the W be the width on effective Photoelectric Detection surface 22 of photoelectric detector 20 as used herein.Effectively the width on Photoelectric Detection surface 22 is the width along the direction of incident light wire harness 50.When the Photoelectric Detection surface is compared relative hour with luminous flux, shown in Figure 3, convergence apparatus 30 preferably is arranged between diffraction grating 10 and the photoelectric detector 20 as lens.As mentioned above, under the situation of diffraction grating, when incident angle displacement Δ θ, the output angle displacement is approaching-Δ θ.Therefore, incide the main shaft displacement-Δ θ of the relative lens of optic axis of the light on the convergence apparatus (lens) 30.When f was the focal length of lens, this light focusing was in distance axis of lens f * tan (Δ θ) position far away.
The position displacement of luminous point must be not more than W/2, so that photoelectric detector, for example the center on effective Photoelectric Detection surface of photodiode can be positioned on the main shaft of lens, and the loss between lens and the photoelectric detector simultaneously can be reduced to the value that is not higher than 3dB.Therefore, when satisfying following formula (6), the loss that is caused by the displacement θ of diffraction grating established angle can be reduced to the value that is not higher than 3dB.
|tan(Δθ)|≤W/(2f) (6)
In addition, under the angular displacement of the reflection ray situation consistent with Δ θ, this relation can be applied to level crossing.
The influence that is caused by the displacement of established angle will describe according to specific embodiment below.
The diffracted ray scioptics can coalescence photoelectric detector (photodiode) by effective Photoelectric Detection surface with 35 μ m * 100 μ m (W=35 μ m) size receive.The focal distance f of convergent lens is 7.96mm.Spot diameter in the best focus position of the light with wavelength X=1570nm is approximately 14 μ m.
Fig. 4 is the relation that shows between the position displacement of the displacement of established angle and luminous point.For the loss between lens and the photodiode is reduced to the value that is not higher than 3dB, under the situation of diffraction grating, the displacement of established angle will be in scope approximately ± 3 °, under the situation of level crossing, greatly in ± 0.07 ° scope.From then on situation can clearly be found out, the permission angular error of diffraction grating is not less than 40 times of permission angular error of level crossing.
Table 1
| Project | Unit | Value | |||
| Δθ | ° | 0 | 1 | 3 | |
| Incident angle | ° | 45 | 46 | 48 | |
| Output angle | ° | -45 | -44 | -42 | |
| Angle change amount | ° | 90 | 90 | 90 | |
| Angular displacement | ° | 0 | 0 | 0 | |
| Position displacement Δ x:z= | μm | 0 | 0 | 0 | |
| Position displacement Δ x:z= | μm | 0 | 0 | 0 | |
Table 2
| Project | Unit | Value | |||
| Δθ | ° | 0 | 1 | 3 | |
| Incident angle | ° | 45 | 46 | 48 | |
| Output angle | ° | -45 | -46 | -48 | |
| Angle change amount | ° | 90 | 92 | 96 | |
| Angular displacement | ° | 0 | 2 | 6 | |
| Position displacement Δ x:z= | μm | 0 | 35 | 105 | |
| Position displacement Δ x:z= | μm | 0 | 105 | 315 | |
Secondly, with the explanation incident ray 4 approaching situations that comprise the directional light wire harness of a plurality of wavelength components.In the case, incident ray 4 is assembled by convergence apparatus 40 by the diffraction grating diffraction, and detects by diffracted ray pick-up unit 20-1,20-2,20-3.
For example, as shown in Figure 5, the incident ray 4 that comprises wavelength components λ 1, λ 2 and λ 3 incides on the transmission-type diffraction grating 10.Light shafts 8 by diffraction grating 10 diffraction send in different directions according to wavelength.For example, the diffraction light wire harness composition of wavelength X 2 is with the output of this direction, so that the angle (angle of diffraction) between the optic axis 7 of diffraction light wire harness composition and the perpendicular line 5 of drawing from the substrate 12 of diffraction grating 10 is β 2.Diffraction light wire harness composition is assembled by the convergent lens 40 for convergence apparatus, and incides as on the corresponding photoelectric detector 20-2 in the photodetector array 20 of diffracted ray pick-up unit.
In the present invention, be used to make the light input media that incides on the optics module near parallel light shafts can be laser beam sources or optical fiber collimator, maybe can be the combination of astigmatic source and collimator lens.Convergence apparatus can be convergence plane mirror or diffraction optical element, rather than convergent lens.If for the diffraction optical element of spectral distribution element itself has converging action, then do not need to provide the convergence apparatus of any special use.The diffracted ray pick-up unit can maybe can be optical fiber for photoelectric detector such as photodiode.
Though for simplicity, Fig. 5 has shown the situation of three wavelength, and incident ray can comprise that a large amount of wavelength components (being not less than two wavelength components) maybe can be for having the light that continuous wavelength distributes.The element of diffracted ray pick-up unit can be provided with according to the needs quantity of passage.
As embodiment, the light that will consider to have wavelength X 1=1550nm, λ 2=1570nm and λ 3=1590nm now incides the transmission-type diffraction grating that every mm has 900 grooves with 45 ° incident angle.Under the situation of this embodiment, expression formula (2) is almost satisfied by wavelength X 2.
Table 3 and Fig. 6 be presented at diffraction grating and as incident ray near the incident ray under the situation of the angle between the directional light wire harness (after this being called " diffraction grating established angle ") displacement predetermined angle subject to the foregoing (α in this embodiment=45 °) and the view at the angle between the diffracted ray.
Can clearly find out from table 3, though the displacement of diffraction grating established angle ± 5 °, under the situation of transmission-type diffraction grating, the change amount at the angle between incident ray and the diffracted ray is not more than 0.3 °.
That is to say, as the collimator of incident light line source and convergent lens and the position relation that is used to receive between the photoelectric detector of diffracted ray keep constant, and irrelevant with the diffraction grating established angle.
On the other hand, at light with wavelength X 1=1550nm, λ 2=1570nm and λ 3=1590nm, identical with the previous embodiment mode, incide under the diffraction grating situation that every mm has 900 grooves with 45 ° incident angles, consider to use the spectrometer optical system of reflection-type diffraction grating shown in Figure 16.Table 4 and Fig. 6 are presented at diffraction grating established angle (α this embodiment=45 °) under the situation of predetermined angle displacement, the view at the angle between incident ray and the diffracted ray.
Can find out clearly that from table 4 when diffraction grating established angle displacement ± 5 °, the change amount at incident ray under the reflection-type diffraction grating situation and the angle between the diffracted ray reaches about 20 °.
That is to say, unless as the collimator of incident light line source and convergent lens and the position relation that is used to receive between the photoelectric detector of diffracted ray regulate according to the diffraction grating established angle, otherwise spectral distribution light can not be directed to corresponding photoelectric detector.
From table 3 and 4 and Fig. 5 can find out clearly that with regard to the change amount at angle between incident ray and the diffracted ray, the stability of transmission-type diffraction grating is not less than 60 times of reflection-type diffraction grating stability.
For example, when the convergent lens with 7.96mm focal length was used to produce the luminous point that the photoelectric detector of the effective Photoelectric Detection width by having 35 μ m receives, 25 times the situation of permission angular error that this situation and permission angular error in the transmission-type diffraction grating are not less than reflection-type diffraction grating was identical.
On the basis of afore-mentioned, be characterised in that according to the optics module of one aspect of the invention the optics module has the follower that is used to keep each component part.
Table 3
| The displacement of established angle | Incident angle | Angle between incident ray and the diffracted ray (°) | ||
| ° | ° | λ＝1550nm | λ＝1570nm | λ＝1590nm |
| -10 | 35 | 89.8 | 87.9 | 86.0 |
| -5 | 40 | 91.2 | 89.6 | 88.0 |
| -4 | 41 | 91.4 | 89.8 | 88.2 |
| -3 | 42 | 91.5 | 89.9 | 88.4 |
| -2 | 43 | 91.5 | 90.0 | 88.5 |
| -1 | 44 | 91.5 | 90.1 | 88.6 |
| 0 | 45 | 91.5 | 90.1 | 88.6 |
| 1 | 46 | 91.5 | 90.1 | 88.6 |
| 2 | 47 | 91.4 | 90.0 | 88.6 |
| 3 | 48 | 91.3 | 90.0 | 88.5 |
| 4 | 49 | 91.2 | 89.8 | 88.4 |
| 5 | 50 | 91.0 | 89.7 | 88.3 |
| 10 | 55 | 89.8 | 88.6 | 87.3 |
Table 4
| The displacement of established angle | Incident angle | Angle between incident ray and the diffracted ray (°) | ||
| ° | ° | λ＝1550nm | λ＝1570nm | λ＝1590nm |
| -10 | 35 | -20.2 | -22.1 | -24.0 |
| -5 | 40 | -8.8 | -10.4 | -12.0 |
| -4 | 41 | -6.6 | -8.2 | -9.8 |
| -3 | 42 | -4.5 | -6.1 | -7.6 |
| -2 | 43 | -2.5 | -4.0 | -5.5 |
| -1 | 44 | -0.5 | -1.9 | -3.4 |
| 0 | 45 | 1.5 | 0.1 | -1.4 |
| 1 | 46 | 3.5 | 2.1 | 0.6 |
| 2 | 47 | 5.4 | 4.0 | 2.6 |
| 3 | 48 | 7.3 | 6.0 | 4.5 |
| 4 | 49 | 9.2 | 7.8 | 6.4 |
| 5 | 50 | 11.0 | 9.7 | 8.3 |
| 10 | 55 | 19.8 | 18.6 | 17.3 |
Embodiment
The Application Example of using the optical system according to the present invention will be described below.
In embodiment 1, the transmission-type diffraction grating is used to change optical path.As everyone knows, the transmission-type diffraction grating has the spectral distribution function that shows the different diffraction angle according to wavelength.Therefore, except optical path changes, the embodiment that uses this spectral distribution function will be described also.Fig. 7 shows the situation of using the embodiment 1 of optical system according to the present invention.
Relative 1550nm wavelength, the plano-convex lens with 4mm diameter and 7.96mm focal distance f is as in collimator lens 132 and the convergent lens 130 each.Have the useful area of 4 * 6mm and the dark groove thin slice diffraction grating of 900 grooves of every mm and be used as diffraction grating 110.Grating is partly used SiO
2And Ta
2O
5As two-layer setting.The width of each groove is approximately 1.45 μ m.Ratio (duty ratio) between the width of each conduit (flue) and the spacing of groove is set at 0.5.Each all has array that the photoelectric detector 122 on effective Photoelectric Detection surface of 35 μ m * 100 μ m sizes is provided with the interval of 200 μ m as photodetector array 120.
The light 51 of the multiplexed wavelength of propagating by optical fiber 160 with 1510nm, 1530nm, 1550nm and 1570nm is exported from fibre-optic end surfaces 160b, and incides on the collimator lens 132.The distance setting of first surface 132a from fibre-optic end surfaces 160b to collimator lens is about 6.21mm.From the light of the second surface 132b of collimator lens output as being provided with near directional light wire harness 53.Directional light wire harness 53 incides on the surface of diffraction grating with about 45 ° incident angle.Output light shafts 54 by diffraction grating 110 diffraction send with different angles according to the substrate surface 110b of wavelength from diffraction grating.
Reflection reduction film (not shown) by the dielectric multilayer film production is arranged on the substrate surface 110b.The output light shafts 54 that incide on the convergent lens 130 are assembled by convergent lens 130, incide respectively on the photoelectric detector 122 of photodetector array 120 according to wavelength then.In the case, the surface of the substrate 124 that photodetector array is mounted thereon that is to say, the Photoelectric Detection surface 122a of photoelectric detector 122 is parallel to the optic axis of optical fiber 160 to be fixed.The distance setting of Photoelectric Detection surface 122a from the second surface 130b of convergent lens to photoelectric detector 122 is about 6.17mm.
In the case, because the groove number in the diffraction grating equals the groove number in the aforementioned diffraction grating, so, have the incident ray of 1570nm wavelength and the angle between the output light and become about 90 °.That is to say, when using aforementioned structure, can realize simultaneously that demultiplexing and 90 ° of optical paths change.Because do not need to use any plane mirror, so, the quantity of part and convenient for assembly/collimating optical system can be reduced.Collimator lens, diffraction grating and convergent lens can be installed in the area of 10 * 10mm, so that can greatly reduce the size of demultiplexing module.
Though this embodiment has shown the discrete situation of wavelength of incident ray, the present invention also can be applied to the situation that wavelength has continuous wavelength spectrum.In the case, the output angle of diffracted ray continuously changes, but when photoelectric detector is placed on preposition, can detect the light shafts with predetermined wavelength.
Embodiment 2
Though the above-mentioned situation that has illustrated that light demultiplexing module forms, above-mentioned same optical system also can be used to form light demultiplexing module shown in Figure 8.For the formation part of optical system, the photodetector array of Fig. 7 can be replaced with light radiated element array.
In light emission element arrays 270, each four surperficial light emission semiconductor Laser device 272 that all have the effective sunlight emitting surface of 50 μ m diameters is provided with the interval of 200 μ m.Laser diode is launched the light shafts of 1510nm, 1530nm, 1550nm and 1570nm wavelength respectively.Be calibrated to respectively near parallel light shafts 56 by collimation lens 232 from the light shafts 55 of laser diode 272 outputs.Directional light wire harness 56 incides on the surface of diffraction grating with about 45 ° incident angle.Light shafts with a plurality of wavelength by diffraction grating 210 diffraction are by multiplexed and be output as the Wave division multiplexing light shafts.The output light 57 that incides on the convergent lens 230 is assembled by convergent lens 230, and the end surfaces with optical fiber 260 is connected then.
When using aforementioned structure, can realize multiplexed simultaneously and 90 ° of optical paths changes.Because do not need to use any plane mirror, so, the quantity of part and convenient for assembly/collimating optical system can be reduced.Collimator lens, diffraction grating and convergent lens can be installed in the area of 10 * 10mm, so that can greatly reduce the size of multiplexed module.
Can be used in combination structure shown in Figure 7 and structure shown in Figure 8.That is to say that the Wave division multiplexing light of propagating by optical fiber passes through light demultiplexing module by demultiplexing.When electric treatment was applied to the light shafts of demultiplexing as modulation according to wavelength, light shafts passed through the multiplexed module of light by multiplexed, so that final light shafts can be once more as Wave division multiplexing light shafts and optical fiber coupling.In the case, integrated onboard the time when photoelectric detector, light emission element and electronic circuit, that is to say, when forming so-called optical/electrical mixed mounting plate, can reduce the size of optics module on the whole.
Embodiment 3
Fig. 9 and 10 has shown according to embodiments of the invention 3.
Fig. 9 shows the cut-open view of cutting open along the central shaft of the optics module according to the present invention.The light input media is the collimator with optical fiber 350 and collimator lens 330.The light of exporting from the end surfaces of optical fiber 350 is calibrated to the directional light wire harness.The directional light wire harness incides on the transmission-type diffraction grating 10.Collimator keeps by first keeper (collimator keeper) 335.Collimator keeper 335 is a cylindrical shape, so that collimator lens 330 and be used to keep the lasso 360 of optical fiber 350, is inserted into and remains in the hollow parts of cylinder of collimator keeper 335.Hollow parts is a round section, and forms from the optical path of the parallel rays flux of collimator output.
Light by the diffraction grating diffraction is focused on the Photoelectric Detection surface as the photodetector array 20 of diffracted ray pick-up unit by convergent lens 40.Convergent lens 40 keeps by second keeper (convergent lens keeper) 345.Equally, convergent lens keeper 345 is circular, so that convergent lens 40 is inserted into and remains in the hollow parts of cylinder of convergent lens keeper 345.Hollow parts is a round section, and forms from the optical path of the diffracted ray of diffraction grating output.
Transmission-type diffraction grating 10 remains so that be placed between the end face of collimator keeper 335 and convergent lens keeper 345.
In addition, be used to keep the 3rd keeper (photoelectric detector keeper) 325 of photodetector array 20 to be connected to the convergent lens keeper.To specify the coupling part between photoelectric detector keeper 325 and the convergent lens keeper below.
Though previous embodiment has shown optical fiber 350 that remains in the lasso 360 and the situation of fixing by collimator keeper 335 as the plano-convex lens 330 of collimator lens 330, classification index lever lens etc. also can be used as collimator lens and use.In addition, the optical fiber collimator of making in advance as shown in figure 10 can fixedly advance in the collimator keeper 335.The optical fiber collimator forms for use in the lasso 360 of fixed optics fiber 350 and classification index lever lens 332 and is installed in the pipe fitting 334.
In the assembling of optical fiber collimator, the elevation angle of the optic axis of distance between fibre-optic light output end surface and the lens and optical fiber and/or lens needs to regulate according to the condition that is used to obtain good directional light wire harness.In optics module according to the present invention, governor motion is arranged in the collimator keeper.Specifically, use the governor motion of spiral as the embodiment setting shown in Figure 11 A or the 11B.In the embodiment shown in Figure 11 A, used measurement mechanism, wherein threaded hole is arranged on the side surface of collimator keeper 335 with symmetric position, so that the optic axis of lasso 360 is regulated according to the push-in stroke of regulating screw thread 338 and be fixing.In the embodiment shown in Figure 11 B, the optical fiber collimator is integrally-regulated in the same way.
As mentioned above, transmission-type diffraction grating 10 remains so that be placed between the end surfaces of collimator keeper 335 and convergent lens keeper 345.Therefore, the light outlet opening side end surface 317 of collimator keeper 335 is treated to inclination like this so that optic axis equals diffraction grating established angle θ relatively.
When the diffraction grating retaining part 315 of the end surfaces that is arranged on collimator keeper 335 is combined with the diffraction grating retaining part that is arranged on the end surfaces of convergent lens keeper, form cavity 318 so that the diffraction grating substrate fits into cavity 318 each other between the end surfaces of part adjacency.In special optimal way, being used to cooperate the degree of depth of the cavity 318 of diffraction grating is the 51-53% of the thickness of diffraction grating substrate 312, so that prevent that diffraction grating from breaking and displacement.One cavity also is arranged in the end surfaces of convergent lens keeper 345.Under the situation of transmission-type diffraction grating as mentioned above, because the permissible error of established angle is very big, so, any mechanism that does not need to be provided for especially regulating established angle.
Shown in Figure 12 A and 2B, a structure is arranged on the side of convergent lens keeper 345 of relative diffraction grating retaining part 348, so that structure may be fitted to photoelectric detector keeper 325 and rotates around optic axis.The end parts 347 that is coupled to the convergent lens keeper 345 of photoelectric detector keeper 325 specifically forms and resembles cylindrical shape.The through hole 326 that forms similar round section is arranged in the part of photoelectric detector keeper 325 of the end parts 347 that is coupled to convergent lens keeper 345.The internal diameter of through hole 326 forms less times greater than the external diameter of the cylinder end part 347 of convergent lens keeper 345, so that through hole 326 and cylinder end part 347 can rotatably cooperate each other.
Because photoelectric detector keeper 325 can be used to keep convergent lens keeper 345 rotations of diffraction grating relatively, the diffraction direction (scattering direction) of the different wave length by diffraction grating can regulate with photoelectric detector that direction is set is consistent.After the adjusting, photoelectric detector keeper 325 is installed by the set bolt 323 that is arranged in the photoelectric detector keeper.
Though previous embodiment has shown the optical system of the diffraction grating that is used for the about 90 ° incident ray of bending, bending angle is not limited to 90 °.When bending angle was 90 °, each in the diffraction grating retaining part of collimator keeper and the diffraction grating retaining part of convergent lens keeper was that 45 ° angle is handled with relative axle all.When diffraction grating need be with another fixed angle, in the scope angle and that be set at the angle between incident ray and diffracted ray between the angle between the end surfaces of collimator lens keeper and the axle side's direction and the end surfaces of convergent lens keeper and the axle side's direction.
The concrete structure of the small-sized spectrum distributed mode group of embodiment of the present invention will be described below.
This embodiment has shown to have the spectral distribution module of basic structure as shown in Figure 9.The spectral distribution module comprises optical fiber chip, collimator lens, transmission-type diffraction grating, convergent lens and photodetector array.
The quartzy monotype optics fiber 350 that fixedly advances to have the cylindrical ferrule 360 of 4mm external diameter is used as the optical fiber chip.By BK7 make and have the 4mm diameter and relatively the plano-convex lens of the 7.96mm focal length of 1550nm wavelength as collimator lens 330.
The same plano-convex lens that is used for collimator lens also is used for convergent lens 40.
Have the useful area of 4 * 6mm and the dark groove thin slice diffraction grating of 900 grooves of every mm and be used as diffraction grating 110.Diffraction grating is formed on the quartz base plate.Diffraction partly forms SiO
2And Ta
2O
5Double-layer structure.The degree of depth of each groove is approximately 1.45 μ m.Ratio (duty ratio) between the width of each groove and the spacing of groove (pitch) is set at 0.5.The thickness setting of diffraction grating substrate is 2mm.
Diffraction grating is fixed as so that its Difraction surface is arranged on as the light incidence surface on the side of collimator keeper 335, and simultaneously, its substrate rear surface is arranged on the side of convergent lens keeper 345 as the light output surface.For fixing, use following method: diffraction grating 10 is fitted in the cavity in the diffraction grating retaining part that is formed at collimator keeper 335, then collimator keeper 335 screw threads are installed to convergent lens keeper 345, clamp diffraction grating 10 by convergent lens keeper 345 simultaneously.
Be used as photodetector array 20 with the interval setting of 50 μ m and the setting of 22 photoelectric detectors that each all has the 35 μ m * effective Photoelectric Detection of 100 μ m surface.That is to say that photodetector array 20 has the setting of 22 passages.
Though each keeper is all installed each other by being threaded, in optimal way, keeper is finally by installations such as thermosetting bonding agents.
Though it is columnar situation that embodiment has shown collimator keeper and convergent lens keeper, the cross section of outer shape is not limited to circle.In optimal way, this shape is selected according to the condition that is used for this module is installed into housing.Though usually in optimal way, the cross section of each hollow parts is circular, because hollow parts is as the optical path setting of luminous flux, the cross sectional shape of hollow parts is not always to be confined to this.Each keeper and size of component, angle, material etc. just show as embodiment, rather than are confined to embodiment.
According to aforementioned structure, the following setting of each optical element.
Distance setting from the end surfaces of optical fiber 350 to the first surface of collimator lens 330 is about 6.21mm.As shown in figure 13, the distance Y between the summit of the first surface 40a of the optic axis 333 of collimator lens 330 and convergent lens is set at 4.0mm.The displacement D1 of optic axis 333 of collimator lens 330 of line that leaves the center line 10c of the substrate that passes diffraction grating 10 and be parallel to the optic axis 333 of collimator lens 330 is set at 1.1mm.At the center line 10c that passes the diffraction grating substrate and be parallel to the axle place of the surperficial 10a of diffraction grating, optic axis 343 distances of convergent lens 40 are set at 0.8mm by the displacement D2 of the axle of 33390 ° of acquisitions of optic axis of rotation collimator lens 330.Each element is set to so that the distance setting from the second surface of convergent lens 340 to the front surface of each photoelectric detector is about 6.17mm.
The light of the continuous spectrum in having from 1470nm to the 1590nm scope incides on the optical fiber 350 of spectral distribution module of making like this.When light is calibrated near the directional light wire harness by collimator lens 330, incide on the diffraction grating surface near the incident angle of parallel light shafts with 45 °.Therefore, export from the substrate surface of diffraction grating with different angles according to wavelength by the light shafts of diffraction grating 10 diffraction.The light shafts (diffracted ray) of output incide on the convergent lens 340 and by convergent lens 340 to be assembled, so that incide according to wavelength on each photoelectric detector of photodetector array 20.In this structure, can obtain to have the spectral distribution characteristic of about 5nm wavelength resolution ability.
The module that comprises housing and photodetector array can be installed in the space of 20 * 40 * 10mm, so that can significantly reduce the size of spectral distribution module.
Claims (22)
1. an optics module comprises and uses diffraction optical element to be used for the about 90 ° optical system of optic axis that bending has the incident light wire harness of specific wavelength.
2. optics module according to claim 1 is characterized in that:
Described diffraction optical element is the transmission-type diffraction grating.
3. optics module according to claim 2 is characterized in that:
The number N of described transmission-type diffraction grating further groove is passed through following formulate:
N＝±(cosα+sinα)/(mλ)
Wherein ± and for the light shafts that have a specific wavelength λ when m progression diffraction light wire harness are incident on incident angle α when using under the condition on the transmission-type diffraction grating, the symbol identical with the symbol of m.
4. optics module according to claim 3 is characterized in that:
The substrate of described transmission-type diffraction grating is installed in the angle of α ± 5 ° scope with described relatively incident light wire harness.
5. optics module according to claim 4 is characterized in that:
The substrate of described transmission-type diffraction grating is installed in the angle of α+Δ θ scope with relative incident light wire harness;
Light shafts by transmission-type diffraction grating diffraction are assembled by the lens with focal distance f, have on the photoelectric detector on Photoelectric Detection surface of width W so that be incident on to have along the direction of incident light wire harness; And
Satisfy following relation:
tan|Δθ|≤W/(2f)。
6. optics module according to claim 5 also comprises:
One that is used for making the light shafts with multiplexed wavelength to be incident on using described wavelength as the light input media on the transmission-type diffraction grating of specific wavelength; And
Being used to receive each all has by the transmission-type diffraction grating by demultiplexing and from a plurality of photoelectric detectors of each light shafts of the single wavelength of described transmission-type diffraction grating output.
7. optics module according to claim 6 is characterized in that:
The described light input media that is used to light shafts are incided on the transmission-type diffraction grating is optical fiber or waveguide, and it is fixed as so that optic axis is parallel with the plate that the optics module is installed;
Described transmission-type diffraction grating is fixed as when inciding on the transmission-type diffraction grating with convenient light shafts, and the light shafts with specific wavelength are being exported near the direction of hanging down as for described plate; And
Being used to receive the photoelectric detector that all has each light shafts of single wavelength from each of transmission-type diffraction grating output is a plurality of light sheets electrical detecting elements, and it is parallel to described optic axis and is arranged on wherein each and all has each position that reaches described plate from the light shafts of the single wavelength of transmission-type diffraction grating output.
8. optics module according to claim 4 also comprises:
Be used to launch a plurality of light launchers of light shafts with different wave length; And
Be used to receive the light shafts that have from the multiplexed wavelength of transmission-type diffraction grating output, so that the light shafts that send from a plurality of light launchers pass through the multiplexed photoelectric detector of transmission-type diffraction grating,
Wherein specific wavelength is in the described wavelength one.
9. optics module according to claim 4 also comprises:
Be used in predetermined wavelength range, making light shafts to incide light input media on the transmission-type diffraction grating with continuous wavelength; And
Be used to receive have and distribute and from the photoelectric detector of the light shafts of the predetermined wavelength of transmission-type diffraction grating output by transmission-type diffraction grating spectrum,
Wherein said specific wavelength is in the predetermined wavelength range of incident light wire harness.
10. optics module according to claim 1 also comprises:
Essence is used to calibrate the collimator that incides the light shafts on the described diffraction optical element.
11. optics module according to claim 1 also comprises:
Be used to assemble convergence apparatus from the light shafts of diffraction optical element output.
12. optics module according to claim 1 also comprises:
The first cylinder keeper with first hollow parts;
The second cylinder keeper with second hollow parts;
Be arranged on the diffraction grating between the first and second cylinder keepers;
Keep so that first hollow parts forms the light input media of the optical path of incident ray by first keeper in first hollow parts;
Be connected to the end parts of second keeper relative so that the hollow parts of second keeper forms the diffracted ray pick-up unit of the optical path of diffracted ray with diffraction grating;
Wherein diffraction grating is fixed as so that on the plane of light incidence of the diffraction grating adjacency end parts of first keeper, and the light output face of diffraction grating is on the end parts of second keeper.
13. optics module according to claim 12 is characterized in that:
Angle between the axial direction of the cylinder of the end surfaces of the end parts of first keeper on the adjacency diffraction grating and first keeper, and the angle between the axial direction of the cylinder of the end surfaces of the end parts of second keeper on the diffraction grating and second keeper and be set in the scope at the angle between incident ray and the diffracted ray.
14. optics module according to claim 12 is characterized in that:
Described light input media comprises collimator.
15. optics module according to claim 12 is characterized in that:
Described second keeper keeps convergence apparatus in second hollow parts.
16. optics module according to claim 14 is characterized in that:
Described first keeper has the mechanism that is used to regulate collimator.
17. optics module according to claim 12 is characterized in that:
Coupling part between described second keeper and the described diffracted ray pick-up unit is coupled to the keeper that is used to keep the diffracted ray pick-up unit, so that described coupling part can be around described optic axis rotation.
18. optics module according to claim 12 is characterized in that:
Groove number N in the described transmission-type diffraction grating is passed through following formulate:
N＝±(cosα+sinα)/(mλ)
Wherein ± incide when using under the condition on the transmission-type diffraction grating symbol identical with incident angle α for have the incident ray that is included in the wavelength X of importing from the light input media when the light shafts (m is an integer) of m progression diffraction with the symbol of m.
19. optics module according to claim 12 is characterized in that:
Described light input media has optical fiber and plane-convex lens.
20. optics module according to claim 12 is characterized in that:
Described light input media has optical fiber and classification index lever lens.
21. optics module according to claim 15 is characterized in that:
Described convergence apparatus is a plane-convex lens.
22. optics module according to claim 12 is characterized in that: described diffracted ray pick-up unit is a photodetector array.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102323668A (en) * | 2011-09-13 | 2012-01-18 | 武汉朗睿科技有限公司 | Tunable optical filter integrated with angle sensor |
| CN108369769A (en) * | 2015-08-30 | 2018-08-03 | 奥普迪科锁业公司 | By using the container anti-tampering protection of printing fiber manufacturing and integrated sensor |
| CN108535822A (en) * | 2018-04-03 | 2018-09-14 | 中国科学院半导体研究所 | Optical waveguide turns to coupled structure assembly and optical waveguide turns to alignment monitoring system |
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| JP2012022154A (en) * | 2010-07-14 | 2012-02-02 | Mitsubishi Electric Corp | Wavelength division multiplex receiver module |
| KR101262499B1 (en) * | 2010-12-24 | 2013-05-08 | 엘지이노텍 주식회사 | Optical printed circuit board and method for manufacturing the same |
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| CN107121782A (en) * | 2017-05-26 | 2017-09-01 | 武汉光迅科技股份有限公司 | A kind of compact multi-wavelength light component and its application method |
| KR102045476B1 (en) | 2018-06-28 | 2019-11-15 | 옵티시스 주식회사 | Optical connector |
| WO2023163224A1 (en) * | 2022-02-28 | 2023-08-31 | 株式会社エンプラス | Optical receptacle and optical module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102323668A (en) * | 2011-09-13 | 2012-01-18 | 武汉朗睿科技有限公司 | Tunable optical filter integrated with angle sensor |
| CN108369769A (en) * | 2015-08-30 | 2018-08-03 | 奥普迪科锁业公司 | By using the container anti-tampering protection of printing fiber manufacturing and integrated sensor |
| CN108369769B (en) * | 2015-08-30 | 2019-11-01 | 奥普迪科锁业公司 | By using the container anti-tampering protection of printing fiber manufacturing and integrated sensor |
| CN108535822A (en) * | 2018-04-03 | 2018-09-14 | 中国科学院半导体研究所 | Optical waveguide turns to coupled structure assembly and optical waveguide turns to alignment monitoring system |
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| CN101566711A (en) | 2009-10-28 |
| JP2006189672A (en) | 2006-07-20 |
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