CN1179548A - Optical isolator and its making method - Google Patents
Optical isolator and its making method Download PDFInfo
- Publication number
- CN1179548A CN1179548A CN 96120342 CN96120342A CN1179548A CN 1179548 A CN1179548 A CN 1179548A CN 96120342 CN96120342 CN 96120342 CN 96120342 A CN96120342 A CN 96120342A CN 1179548 A CN1179548 A CN 1179548A
- Authority
- CN
- China
- Prior art keywords
- light
- optical fibre
- optoisolator
- polariscope
- collimator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
An optical isolator is composed of collimator including input optical fibre and its fixture, isolator including polarizator, revolver and polarization analyzer, condenser consisting of output optical fibre and its fixture. Said optical isolator is made up by welding two units into a tubular whole including an internal disk to prevent the isolator from being affected by hot welded material, and a tubular body for isolating the polarizator, polarization analyzer and isolator with each other.
Description
The present invention relates in the fibre system, be used to isolate the optoisolator and the manufacture method thereof of light signal.
Optoisolator (Optical isolators) is the key element that is used in by in the optical fiber telecommunications system of laser generation light signal.For example, in a kind of projection-type high-speed information channel (projected information highway) system, in transmitter, adopt semiconductor laser to produce conduction (forward directed) light signal.As everyone knows, by the light signal that these laser produced, may carry: the information that presents with numeral, simulation or combined type form (format).
If employed laser signal is subjected to unwanted smooth reflected signal in a transmitter, several disadvantageous effects then will take place.These disadvantageous effects comprise: optical wavelength vibration (jitter), laser output intensity noise, and the optical power change of non-controlled.
The optical power change of non-controlled: a non-linear laser signal transfer function of the relation between expression laser drive current and Output optical power.This can cause: the degree of distortion (infidelity) that is used for representing to have the electric signal (RF) of a distortion light signal.This mistake degree may be in connecting circuit, and such as judging in (decision making) circuit, will should be the identification of one state mistake becomes " 0 " state.In the simulation system such as multichannel television (TV) system, non-linear in the laser transfer function may cause disturbing between channel.
The laser signal output intensity noise of responding to laser operations can be subjected to the non-required light retroeflection influence of wanting, and TV " signal-noise ratio " is reduced, thereby causes image quality to reduce.When light signal when fiber path is propagated, the optical wavelength vibration of transmitting in optical fiber can further cause television signal distortion because of signals disperse (dispersion).
In digital display circuit, can come carry information with 2,400,000,000 bit/second (that is: Gd/s) or higher speed by the bit symbol.Under this speed, bit just becomes more restricted gradually to the interval of bit.When the optical information bit when an optical fiber advances, these bits just easily disperse, and the signal level of bit is reduced.The signal bits that reduces will definitely cause the increase of bit error rate.Signals disperse can cause the diffusion (spreading) of signal, and causes bit overlapping.The overlapping of bit caused high bit error rate thereupon, and the fidelity (fidelity) in information transmission is reduced.
Therefore, stoping the reverse of light signal or retroeflection transmission to get back to transmitter on the one hand, is necessary and provide low decay in transmission direction on the other hand.
Moreover, in communication system and in some photosystems of hypervelocity information channel operation, be necessary to reduce the signal level of unwanted reflected optical power.
In fibre system, be necessary to make the optoisolator cheaply that reduces reflected optical power.
In photosystem, optoisolator uses with fiber amplifier, so that prevent to lead the vibration of factor reflection, and prevents that the emission of spontaneity (spontaneous) light is injected into the laser transmitter that produces light signal.Such as the light interference effect of spontaneity emission, can be with the accurate generation in reflection position of " 1,000,000/" (that is: 60 decibels (dB) below) of light.Jamming incoherent signal can increase the transmission noise of fibre-optic transmission system (FOTS), thereby causes the reduction and the distorted signals of signal one noise ratio.
Checked and approved to Pan Shi (Jing-Jong Pan) in 1994, and transfer the possession of and give " electronics technology utility companies " (E-Tek Dynamics, Inc,) No. the 5th, 317,655, United States Patent (USP) in, show a kind of optoisolator, have: an input optical fibre, a GRIN (graded index) lens, first polariscope (polarizer), one optical rotator (rotator), as second polariscope of analyzing light microscopic (analyzer), second grin lens, and an output optical fibre.Input optical fibre is connected to by the formed window element of a thin sheet glass (window elemnt).Glass is coated with one deck antireflection material.The thickness of antireflection material layer can be tested on glass sheet, so that whether the decision coating is satisfactory.When coating is satisfactory, just glass sheet is cut into fenestella.Again with one in fenestella optical fiber connector top that is installed on the inclined end portion that is positioned at glass lasso (ferrule).The manufacturing of this window and the process of configuration not only complexity but also costliness.
The object of the present invention is to provide a kind of signal one assorted letter than high optoisolator.
The present invention, in a configuration (arrangement) of a smooth shielding system, the non-signal level that needs of reverse optical signal power is suppressed.The light shielding system comprises that a tubulose is installed in body (tubular containment), to separate mode vertically, accommodates: (1) one collimator (optical collimator); (2) one smooth barrier assemblies, this collimator separates vertically; And (3) one optical collectors (optical collector), this light barrier assembly separates vertically.They are installed in tubulose respectively and are installed in the body.Comprise according to collimator of the present invention: an optical fiber installation component and a graded index (graded index) lens (that is: a grin lens).The optical fiber installation component comprises: an outer end face deflection kapillary (outwardly surface angled capillary) and an input optical fibre.Input optical fibre and outer end face deflection kapillary all are the outer end face deflection along a coincidence plane equally.According to the present invention, input optical fibre and outer end face deflection common plane shape capillaceous deflection surface comprise directly and go up a kind of common deposited anti-reflecting layer that forms at their shared same epitaxial surface (epitaxial surface).Kapillary central supported input optical fibre vertically distributes.Grin lens then is to separate vertically with the optical fiber installation component.
Smooth barrier assembly of the present invention comprises: first and second polariscope; Between first and second polariscope, to separate the optical rotator that mode is fixed vertically.One embodiment of the invention, first and second shield ring (masking ring) separates optical rotator with first and second polariscope respectively vertically.According to one embodiment of the invention, first and second polariscope all is wedge shape (wedge) polariscope, and the input of each wedge shape polariscope and output surface are also non-parallel, and make them produce interference figure line (patterns) between input and output surface.
Optical collector of the present invention comprises: an optical fiber installation component and a grin lens.The optical fiber installation component comprises: an internal end surface deflection kapillary and an output optical fibre.Output optical fibre and internal end surface deflection kapillary all overlap the plane along one equally and are the internal end surface deflection.According to the present invention, output optical fibre and internal end surface deflection common plane shape capillaceous deflection surface comprise a kind of common deposited anti-reflecting layer that directly forms on their shared same epitaxial surface.Kapillary central supported vertically output optical fibre.Grin lens then is inwardly to separate vertically from the optical fiber installation component.
A kind of low attenuate light isolator of one embodiment of the invention can be eliminated in a for example light " transmission of the reverse optical signal in the waveguide (waveguide) of an optical conductor or optical fiber.
Reach embodiment in conjunction with the accompanying drawings, the present invention be described as follows:
The simple declaration of accompanying drawing
Fig. 1 a is the side schematic view of an optoisolator of the present invention;
Fig. 1 b is in the collimator of optoisolator of the present invention, an an input optical fibre and outer end face deflection side skeleton diagram capillaceous;
Fig. 2 is installed in the stereographic map of first part of structure for one of optoisolator of the present invention;
Fig. 3 is the present invention, the schematic perspective view of second part that is installed in structure in first partly the axial contained structure that is installed in structure that assembling the time is fixed in that optoisolator uses.
Fig. 4 is a side-looking drawing in side sectional elevation of an optoisolator of the present invention;
Fig. 5 is a side-looking drawing in side sectional elevation of an optoisolator of the present invention, is used for illustrating: during manufacture, analyzing light microscopic and optical rotator are separated, to allow to insert the test and the measurement situation of loss and light isolation; And
Fig. 6 is a side-looking drawing in side sectional elevation of an optoisolator of the present invention, be used for illustrating: during manufacture, analyzing light microscopic and optical rotator are separated, utilize an electromagnet (electromagnet) to insert the test and the measurement situation of loss and light isolation to allow.
Detailed description of the invention
Fig. 1 a is a side schematic view of of the present invention one smooth shielding system 1.Comprise according to optoisolator of the present invention: a collimator 2, one smooth barrier assemblies 3, and an optical collector 4 (or condenser (optical condenser)).Collimator 2, light barrier assembly 3 and optical collector 4 keep each other apart from one another by the shaft orientation relation of opening.Comprise that according to optoisolator 1 of the present invention a tubulose is installed in body 5, is illustrated as follows with reference to figure 2 and 3 now.
More particularly, collimator 2 has axially spaced-apart apart from light barrier assembly 3, and light barrier assembly 3 also has axially spaced-apart with optical collector 4; They are installed in the tubulose of promptly being discussed with reference to Fig. 2 and Fig. 3 respectively and are installed in the body 5.For the ease of operation, light barrier assembly 3 is configured in an optimum position between collimator 2 and the optical collector 4.At this place, the light beam that collimator 2 and optical collector are 4 comes down to parallel.As shown in Figure 4, in being installed in body 5, can utilize fixed screw (set screws), finish collimator 2, light barrier assembly 3 and optical collector 4 and reach horizontal positioning action vertically, this is discussed in detail as follows.
In light shielding system 1, collimator 2, light barrier assembly 3, and the relation between the optical collector 4 are allowed on input optical fibre 6 reception to light signal, this will go through in after.According to the present invention, the structure of optoisolator 1 is allowed: the expansion (expansion) of the light signal between optical fiber installation component 2a and grin lens 2b; Permission is via the transmission of court's light signal forward of light barrier assembly 3, but the prevention reverse transfer; The contraction of the light signal in optical collector 4 (contraction), and the deviation of shrinking light signal again (departure) in an output optical fibre 6 '.A function of collimator 2 is: produce a collimated light beam of light signal, so that light barrier assembly 3 is carried out its isolation features; This will more go through in after.
Input optical fibre 6 and outer end face deflection kapillary 2a ' present the outer end face deflection along a coincidence plane equally.According to the present invention, the common plane shape deflection surface of input optical fibre 6 and outer end face deflection kapillary 2a ' comprises the anti-reflecting layer or the multilayer 2c of the common deposited that directly forms on their common epitaxial surface.The deposition of one deck or more anti-reflecting layers is thick film (thick film) technology that people know, and the material that utilizes people to know is finished, to reach the thickness of quarter-wave.Kapillary 2a ' is along its central shaft, supports input optical fibre 6 with the center axial manner.According to one embodiment of the invention, optical fiber 6 is fixed in the epoxy resin intracardiac among the insertion kapillary 2a '.Then, epoxy resin is solidified, so as in kapillary 2a ' needed axial positions, optical fiber 6 is fixed in the kapillary 2a '.Grin lens 2b and optical fiber installation component 2a are spaced apart vertically.In collimator 2,, optical fiber 6 is embedded (embedded) along the axis of kapillary 2a '.By for example sand milling (sanding) and polishing (polishing) operation, make the input end once selected of optical fiber 6 flush (flushed) with the end of kapillary 2a ', with the common deflection mask of guaranteeing kapillary 2a ' and optical fiber 6 one common angle is arranged.According to one embodiment of the invention, the angle from normal (normal) to the light signal working direction is about 8 degree.One embodiment of the invention are to utilize for example epoxy resin, and the selected end of the warp of optical fiber 6 and kapillary 2a ' is fixed each other.Grin lens 2b comprises first and second end, and both all are coated with antireflecting coating.
One embodiment of the invention, the warp of light 6 and kapillary 2a ' is selected terminal by grinding or utilizing additive method, make it tilt to the angle of about 8 degree.This selected angle guarantees can not make reflected light back coupling coupling, and minimum program is reduced in transmission transmission interference, and is a function of beam profile.This selected angle prevents that the reflection wave of luminous power from turning back to input optical fibre 6.Other surperficial angle at the end all can be carried out replacement, and all applicable in the scope of the present invention.
As shown in Fig. 1 b, the beveled end of optical fiber 6 and kapillary 2a ' is imposed further deposition: by the deposition of selected coating material, directly on their common deflection surface, deposition one deck or more multi-layered selected anti-reflecting layer.One or more layers anti-reflecting layer can improve the light-transfer characteristic of system, and can reduce undesired reflected optical power.A kind of progressive lens of refractive index of optimization gradual change is used to collimate the luminous power that sends from optical fiber 6.Anti-reflecting layer may be such as one deck or two-layer ZrO
2SiO
2Or ThF
2SiO
2Can utilize well-known " spraying plating: (sputter) technology is deposited this material; For example, use an electron gun to implement sputtering deposition.This operation then can: for example, (" Thinfilm Technology is Inc.) on behalf of handling in " the film scientific ﹠ technical corporation " that committee please California, USA Fu Ledun.
Among the present invention, the use of anti-reflecting layer can significantly improve luminous flux (throughput), particularly compares with the mode of cohering anti-reflection plate in a light end, and it can cause the reduction of luminous power processing power.For example, a kind of smooth binder (optical cement) is proved: its quality can reduce in 30 days along with 300 milliwatts (mw) the luminous power radiation under 1550 millimicrons (nm).By the binder interface of eliminating two plates, just can eliminate light reflection improvement luminous flux by way of parenthesis.
Polariscope 3a is the brilliant wedge (birefringent crystal wedge) of for example a kind of birefringence, for example as YvO
4According to one of the present invention embodiment, analyzing light microscopic 3c also is the brilliant wedge of a kind of birefringence.
One of the present invention embodiment, optical rotator 3b are a kind of " faraday " (Faraday) spinners.More particularly, optical rotator 3b is with (Bi YbTb)
3Fe
5O
12Form.In operation, receive input light from collimator 2.The polarization angle of incident ray is relatively from polarization angle rotation 45 degree of incident (incoming) light beam of collimator 2.The rotation adjustment of analyzing light microscopic 3c is set, so that the polarisation light that transmission has been rotated by optical rotator 3b.Light is just collected by optical collector 4, and is coupled in the output optical fibre 6 ' after transmission is through analyzing light microscopic 3c.
In the embodiments of the invention, make the entrance side surface of polariscope 3a, be with just be transmitted in light signal the direction of propagation forward into about 74 the degree angle excursions.Parallel input beam towards light barrier assembly 3 can enter the polariscope 3a of light barrier assembly 3, and is separated into twice light.Wherein a light is along the optical axis of crystal of birefringence polariscope and be subjected to polarization; Another light is then for being subjected to unusual (exraordinary) light of polarization along the direction perpendicular to the optical axis of crystal.Optical rotator 3b is in the reception light from polariscope 3a, with respect to optical axis rotation 45 degree of polariscope 3a.Analyzing light microscopic 3c is aligned (aligned) and becomes to receive ordinary ray and extraordinary light, and the mode that they are in addition compound.
In the embodiments of the invention, light barrier assembly 3 more comprises the first shield ring 3d and the second shield ring 3e, and they separate polariscope 3a and analyzing light microscopic 3c respectively from optical rotator 3b.According to embodiments of the invention, polariscope 3a and analyzing light microscopic 3c are a kind of wedge shape polariscope, and wherein: the input of each wedge shape polariscope and output surface in fact all are non-parallel.
During the combined light isolator, the use of shield ring 3d and 3e has solved a difficult problem.As shown in Figure 4, for example:, make the element of optoisolator in some the selected axial positions on selected aluminium sheet piece 3f.Utilize a kind of selected epoxy resin or viscose (adhesive), element is fixed on some selected positions on the plate., again plate 3f inserted tubulose magnet 3g in, reach being installed in the body of optoisolator thereafter.Unfortunately, viscose may enter between polariscope 3a and the optical rotator 3b, or in the gap between optical rotator 3b and analyzing light microscopic 3c.Viscose enters on optically active (optically active) surface of optical rotator 3b, polariscope 3a or analyzing light microscopic 3c, will seriously reduce their operation and performance quality.For example, the reflection from the surface of surface of polariscope 3a, analyzing light microscopic 3c or optical rotator 3b will cause the interference figure line, and make the performance reduction of optoisolator system 1.Therefore, be that shield ring 3d and 3e are set at respectively between polariscope 3a and the optical rotator 3b, and between optical rotator 3b and analyzing light microscopic 3c.These shield rings have 75 micron thickness approximately, and have 1 millimeter internal diameter and 2 mm outer diameter, are used as the distance piece (spacers) between two polariscopes and optical rotator 3b.Shield ring 3d and 3e prevent that viscose from entering between polariscope 3a and the optical rotator 3b, and in the light path between optical rotator 3b and the analyzing light microscopic 3c.Shield ring 3d and 3e protection are between polariscope 3a and optical rotator 3b; and the inside surface between optical rotator 3b and analyzing light microscopic 3c; thereby prevent to damage the interference that causes because of the viscose material causes; this interference is to lead because of in coming between comfortable polariscope 3a and the optical rotator 3b, and surperficial reflection between optical rotator 3b and analyzing light microscopic 3c.At last, according to the present invention, use shield ring 3d and 3e conduct to withstand polariscope 3a and optical rotator 3b, and the structural detail of all adjacently situated surfaces of optical rotator 3b and analyzing light microscopic 3c, for overall optical isolator 1 provides additional structural strength and robustness (robustness).
In the embodiments of the invention, polariscope 3a and analyzing light microscopic 3c are formed the wedge shape of about 16 degree respectively, and respectively are deposited a selected antireflecting coating; Be used for reducing the light-receiving of retroeflection, and improve the fl transmission state of light signal.As described above, first and second shield ring 3d and 3e provide physical strength improving stability, and improve light and isolate and reduce the luminous flux loss.
Embodiments of the invention can adopt a thin shim (thin shim), are used for making the second polariscope 3c to rotate around the longitudinal axis, with the correction of the rotation that allows optical rotator (that is: the second polariscope 3c), and improve luminous flux and light is isolated.
An one internal end surface deflection kapillary 4b ' and an output optical fibre 6 '.Output optical fibre 6 ' and internal end surface deflection kapillary 4b ' internal end surface deflection kapillary 4b ' present the internal end surface deflection along a coincidence plane equally.According to the present invention, the common plane deflection surface of output optical fibre 6 ' and internal end surface deflection kapillary 4b ' comprises: direct a kind of common deposited anti-reflecting layer of making on their shared same epitaxial surface.Kapillary 4b ' supports output optical fibre 6 ' with the center axial manner.Grin lens 4a inwardly has axially spaced-apart apart from optical fiber installation component 4b.
In optical collector (that is: condenser) 4,, optical fiber 6 ' is embedded along the axis of kapillary 4b '.The condenser light of self-isolation device of collecting, and focused on and enter in the output optical fibre 6 '.In the other direction, condenser becomes a collimator.The tool angular deflection has also been coated the optical fiber connector of anti-reflecting layer, also is a high return loss of output optical fibre.The analyzing light microscopic becomes polariscope now.Also can be from the collimated ray of condenser by polarisation, and be separated into ordinary ray and extraordinary light.Then, by Faraday rotator these light rotations 45 are spent.This rotation with from the rotation of collimator light in the opposite direction.The result is to exchange (swapped) ordinary ray from extraordinary light.These light can not in conjunction with, and can not be focused on by collimator and entered in the input optical fibre 6.
By for example meticulous sand milling and polishing operation, a selected end of optical fiber 6 ' is flushed with the end of kapillary 4b ', have a desirable common angle with the common deflection surface of guaranteeing kapillary 4b ' and optical fiber 6 '.One embodiment of the invention are to utilize for example epoxy resin, and the selected end with optical fiber 6 ' and kapillary 4b ' is interfixed.Then, will be ground or utilized other modes, and make its inclination reach the angles of about 8 degree through selected end.Another embodiment, the pitch angle is less than about 8 degree.The angle that this is selected can prevent that the reflection of luminous power from turning back to output optical fibre 6 '.Other surperficial angle at the end all can replace it, and all applicable in the scope of the present invention.Further more impose deposition,, directly on common deflection surface, deposit one or more layers selected anti-reflecting layer by the deposition of coating material in angled end.One or more layers anti-reflecting layer can improve the light-transfer characteristic of system, and can reduce undesired reflected optical power.A kind of the best is used to cohesion and leaves the luminous power of going forward side by side into optical fiber 6 ' from optoisolator 3 apart from the gradually changed refractive index lens of journey.
Embodiments of the invention, optoisolator can be transferred to output optical fibre 6 ' effectively with the input optical signal from input optical fibre 6, enters in the input optical fibre 6 but stop that the light that is derived from output optical fibre 6 ' returns.
The method that makes up the accurate instrument 2 of optical alignment of the present invention is: via an axial aperture (aperture) that is installed at tubulose on body 5a one end, insert optical fiber 6 and fiber fixed seat assembly 2a.Then, optical fiber installation component 2a is aimed at grin lens 2b, and be fixed in and be installed in the pipe.Penetrate from input optical fibre 6 when light becomes one parallel beam, and when leaving, promptly finished needed alignment function by grin lens 2b.
One embodiment of the invention, the use at the surplus layer of the lip-deep a kind of anti-reflective coating of the deflection of optoisolator can improve the light signal input quantity, and significantly reduces the light reflection.The final retroeflection loss of isolator of having coating and tool angle tilt by oneself is on 70 decibels grade.
Therefore, one embodiment of the invention, a low attenuate light isolator can be eliminated the transmission of the reverse optical signal in an optical waveguide such as an optical conductor or optical fiber.
Method of the present invention, polariscope are combined in the magnetic tube (magnetic tube), and the analyzing light microscopic is combined to magnetic tube to form a kind of optoisolator.In assembly, comprise a shim, adjust, finish tuning (tuning), improve isolation and improve luminous flux to allow around the reverse rotation (counterrotating) of optoisolator axis.For example,, can implement combination adjustment, thereby increase the qualification rate of making (yield) through a shim is inserted between Faraday rotator and the analyzing light microscopic.
Moreover, kapillary) and an input grin lens utilize an input optical fibre holder (for example:, input light capable 6 is combined in first partly first end in order to the tubulose of fixed light collimator 2 dress body.Secondly, optoisolator is inserted remaining space, that is tubulose be installed in body first partly second end in.Then, utilizing output kapillary and output grin lens that output optical fibre 6 ' is combined in tubulose is installed in second part of body.At last, for example utilize annular welds connection (annular soldering), first and second part that tubulose is installed in body is fixed together.One embodiment of the invention impose chamfering (chamferd off) to leading edge capillaceous, to prevent to be installed in to tubulose in Assemble Duration scratch (scraping) inside of two parts of body.
Fig. 2 is according to first stereographic map of 5b partly that is installed in structure 5 of optoisolator of the present invention system.The first part 5b comprises: first and second son part (subportions) 5b ' and 5b of having big and little external diameter respectively ".As shown in the figure, the present invention, second son is 5b partly " can be inserted in be installed in structure 5 second partly of 5a hold in the perforate; And when making combination, must soldered location.
Fig. 3 is the present invention, at second schematic perspective view of 5a partly that is installed in structure 5 of optoisolator system 1.In when combination, be installed in structure 5 first partly 5b be fixed in second partly of 5a axially be installed in the structure.The second part 5a comprises first and second son part 5a ' and the 5d with big and little internal diameter.5a " be the partly interior perimembranous of 5a ' of second son, it has bigger internal diameter, and allows the first son 5b partly of 5b partly " be inserted into partly 5a of son with connecting airtight " in; And make at least partly 5b of son " some insert partly 5a " in.The present invention is making Assemble Duration, is installed in the first part 5b of structure 5, can be welded in the location with the second part 5a that is installed in body 5, to produce suitable light shielding system.When make good first and second partly when 5b and 5a, just at son 5b partly " be installed in the son part 5a of structure 5 with being inserted into " and in the position, weld them together.
Fig. 4 is a side-looking drawing in side sectional elevation of optoisolator 1 of the present invention.Particularly, be installed in first and second part 5b of structure 5 and first and second overlapping tubular flange of 5a in Fig. 4 demonstration.Utilize scolder 5c that 5a and 5b two parts are welded together.Optoisolator 1 comprises a disk (disk) 4a '.Its central axial open allows light signal to have no the obstacle earth's axis to crossing (traversal); And during manufacture, over the ground in order to be installed in that structure 5 first and second part 5b and 5a interfix and the scolder used constitutes a direct obstacle.Therefore, can prevent any scaling powder towards optical element particularly the component orientation in the Optical isolator module 3 splash, and touch these sensitive elements in the optoisolator 1.
As shown in Figure 4, be installed in body 5 and offer five screws, the optical element of correspondence is fixed on some select locations that are installed in the body 5 to allow fixed screw.
Particularly, fixed screw 4b " make optical fiber installation component 4b prop up for the first interior week that is installed in body part 5b.Moreover, fixed screw 4a " make grin lens 4a prop up for the first interior week that is installed in body part 5b.
In addition, thus screw 3g " Optical isolator module 3 is fixed on second a selected axial positions that is installed in body part 5a week.In addition, fixed screw 2a " make optical fiber installation component 2a make optical fiber installation component 2a be fixed in for the second interior week that is installed in body part 5a.Moreover, fixed screw 2b " make grin lens 2b prop up for the second interior week that is installed in body part 5a.
Use method of the present invention, the manufacturing qualification rate is increased significantly.
Fig. 5 is that drawing in side sectional elevation is looked in the survey of an optoisolator of the present invention, is used for illustrating: during manufacture, polariscope 3a and optical rotator 3b are separated, to allow test and the optimization of inserting loss and light isolation.Smooth barrier assembly of the present invention comprises: a polariscope 3a; One optical rotator 3b; An and analyzing light microscopic 3c; The three is fixed with isolated configuration mode vertically.The light barrier assembly comprises one " two partly " formula tubular permanent magnet in addition, polariscope 3a is installed vertically, optical rotator 3b, and analyzing light microscopic 3c in it.In addition, light barrier assembly 3 is installed in a tubulose and is installed in the body 3h.
One embodiment of the invention, optical rotator 3b is a kind of Faraday rotator.More particularly, optical rotator 3b is with (BiYbTb) 3Fe
5O
12Material forms.In operation, receive input light from collimator 2.The polarization angle of incident ray is with respect to polarization angle rotation 45 degree from the incident beam of collimator 2.The rotation adjustment amount of analyzing light microscopic 3c is set, so that the polarisation light that transmission has been rotated by optical rotator 3b.Light is just collected by optical collector 4, and is coupled in the output optical fibre 6 ' after transmission is through analyzing light microscopic 3c.
One embodiment of the invention, light barrier assembly 3 still comprise optical rotator 3b and the isolated vertically shield ring 3e of analyzing light microscopic 3c.According to one embodiment of the invention, analyzing light microscopic 3c is a wedge shape polariscope.During the combined light isolator, the use of shield ring 3e has solved a difficult problem.The element of optoisolator is selected plate 3f ' and the 3f in selected axial positions " go up and make, and make by for example aluminium.Epoxy resin that each element utilization is selected or viscose are fixed on some the select location places on the plate.Wherein, polariscope 3a is installed in plate 3f " on, and optical rotator 3b and analyzing light microscopic 3c are installed on the plate 3f '.Thereafter, with two plate 3f ' and 3f " insert each tubulose magnet 3g ' and 3g " in, and being installed in the body of optoisolator.
As shown in Figure 5, be provided with external jacket (jacker) 3h, so that utilize epoxy resin 3h ' and 3h ", with each tubulose magnet 3g ' and 3g " be fixed on each hole 3q ' and 3q " in.Each tubulose magnet 3g ' and 3g " by being attached on each anchor clamps (fixture) 83 and 84 of can rotation mode adjusting, and can protect the stability of reverse rotation more.With regard to a specific wavelength, in case insert loss and isolate that to have reached a position best or that hoped accurate, just with epoxy resin with each tubulose magnet 3g ' and 3g " the reverse rotation desired location fixed.
Fig. 5 also shows an optical fiber installation component 2a and gradually changed refractive index lens (that is: a grin lens) 2b.Optical fiber installation component 2a comprises an outer end face deflection kapillary 2a ' and has the input optical fibre 6 of buffer coat 56a.At Assemble Duration, in order to insert among the kapillary 2a ', and buffer coat 6a is partly removed from optical fiber 6.Fig. 5 also shows optical fiber installation component 4b and gradually changed refractive index lens (that is: a grin lens) 4a.Optical fiber installation component 4b comprises surface deflection kapillary 4b ' and has the output optical fibre 6 ' of buffer coat 6a '.At Assemble Duration, in order to insert among the kapillary 4b ', and buffer coat 6a ' is partly removed from optical fiber 6a '.For the test that is often had in making, emitting the mode of (successive evolutions) one by one, will be provided to optical fiber 6 ' and optical fiber 6 from light such as a suitable light source of laser.Accordingly, locate to detect this light at optical fiber 6 and optical fiber 6 '.
Fig. 6 is a side-looking drawing in side sectional elevation of an optoisolator system of the present invention, in order to illustrate: during manufacture, polariscope and optical rotator are separated, utilize an electromagnet to insert the test and the optimization of loss and light isolation to allow.Polariscope 3a and optical rotator 3b, and the components apart of analyzing light microscopic 3c; The three is fixed with isolated configuration mode vertically.Tubulose electromagnet 111 is supported by a tubular bracket 110; And in this support, polariscope 3a, optical rotator 3b and analyzing light microscopic 3c are installed vertically then.Optical rotator 3b, and analyzing light microscopic 3c supports by plate 3f.And plate is supported by the anchor clamps 3p that is installed in the tubular bracket 110.The tubulose electromagnet is equipped with the electric energy of " polarity can reverse " (reversible polarrity), so that do not needing under mobile ammeter and the light source situation, promptly allows the measurement of inserting loss and light isolation towards twocouese.Polariscope 3a more is assembled in the rotatable clamp 3p ' clamping in the edge portion of tubular bracket 110.Tubulose electromagnet 111 is equipped with electric power 100 along line of electric force 101 and 102.Make the pole reversal of magnet, just can measure and insert and the light isolation towards other direction.
Claims (16)
1, a kind of optoisolator is provided with:
One collimator comprises:
One input optical fibre has one of tape skew angle and exposes face textural, is used for avoiding originally pointing to the retrodirective reflection of light signal of first preferential direction of a light path;
One fiber fixed seat has the output face that face presents planes overlapping of exposing with input optical fibre, and described collimator has on the coincidence face of this input optical fibre and fiber fixed seat, one deck non-reflective coatings that forms with extensional mode; And
One grin lens, this input optical fibre departs from vertically certainly;
One barrier assembly comprises:
One polariscope;
One spinner, coaxial with this polariscope; And
One analyzing light microscopic; With
One condenser comprises;
One output optical fibre has one of tape skew angle and exposes face textural, is used for avoiding originally pointing to the retrodirective reflection of light signal of a preferential direction of a light path;
One fiber fixed seat has the input face that face presents planes overlapping that exposes with described output optical fibre, and this collimator has on the coincidence face of output optical fibre and fiber fixed seat, one deck non-reflective coatings that forms with extensional mode; And
One grin lens departs from vertically from described input optical fibre.
2, optoisolator according to claim 1 is characterized in that, comprises that more one is installed in body, in order to fix described collimator, barrier assembly and condenser vertically.
3, optoisolator according to claim 2 is characterized in that, the described body that is installed in comprises first and second partly, this two partly have local overlapping and form a shell.
4, optoisolator according to claim 3 is characterized in that, described first and second partly is tubulose.
5, optoisolator according to claim 4 is characterized in that, comprises that more one is installed in this, in order to fix described collimator, barrier assembly and condenser vertically; Other comprises an annulus that is configured in vertically between barrier assembly and condenser.
6, optoisolator according to claim 3 is characterized in that, comprises that more one is installed in body, in order to fix this collimator, isolator vertically, to reach condenser; Other comprises and one of is configured between isolator and condenser annulus vertically.
7, the manufacture method of an optoisolator is combined in a kind of two part formula tubuloses in order to an optoisolator that will comprise a collimator, a barrier assembly and a condenser and is installed in the body, and the method comprises:
Described collimator and barrier assembly are separately fixed at first and second position that two part formula tubuloses are installed in the first selected part of body;
Described condenser is fixed on two part formula tubuloses and is installed in second part of body; And
Described tubulose is installed in first and second two part of body, and interfixing vertically forms a shell.
8, method according to claim 7 is characterized in that, described tubulose is installed in first and second two part of body, is welded into a shell.
9, method according to claim 8 is characterized in that, described isolator is avoided scolder and involved.
10, a kind of optoisolator is provided with:
One is installed in body, has first and second axially open, is used for connecting input and output optical fibre;
One collimator is installed in and is installed in the body, comprising:
One input optical fibre at a textural plane of exposure with band angular deflection, is used for avoiding the back reflection of light signal, these signals then initial directional one light path first through preferential direction,
One fiber fixed seat has an output face that presents planes overlapping with the plane of exposure of input optical fibre, and collimator comprises: on the common coincidence face of input optical fibre and fiber fixed seat, and with one deck non-reflective coatings of direct mode deposition, and
One grin lens, this input optical fibre departs from vertically certainly;
One barrier assembly comprises:
One polariscope,
One spinner, coaxial with polariscope, and
One analyzing light microscopic; With
One condenser is installed in this and is installed in the body, is used for receiving the forward light signal from this isolator.
11, optoisolator according to claim 10 is characterized in that, the described body that is installed in also comprises first and second tubulose part that has first and second flange that overlaps each other respectively.
12, optoisolator according to claim 11 system is characterized in that, more comprises: a structure that is used for separating isolator and described first and second flange.
13, optoisolator according to claim 12 is characterized in that, described separation structure in the form of a ring.
14, optoisolator according to claim 12 is characterized in that, described first and second flange is welded by scolder.
15, a kind of optoisolator is provided with:
One collimator comprises:
One input optical fibre has one of tape skew angle and exposes face textural, is used for avoiding originally pointing to the retrodirective reflection of light signal of first preferential direction of a light path;
One fiber fixed seat has the output face that face is planes overlapping of exposing with input optical fibre; And
One grin lens, this input optical fibre departs from vertically certainly;
One barrier assembly comprises:
One polariscope;
One spinner, coaxial with polariscope;
One analyzing light microscopic, and
One permanent magnet is located at first and second and axially departs from the part, and described polariscope is installed in described first part, and the analyzing light microscopic then is installed in second part; With
One condenser comprises:
One output optical fibre has one of tape skew angle and exposes face textural, is used for avoiding originally pointing to the retrodirective reflection of light signal of a preferential direction of a light path;
One fiber fixed seat has the input face that face presents planes overlapping that exposes with output optical fibre; And
One grin lens departs from vertically from described input optical fibre.
16, a kind of manufacture method of photosystem, this photosystem comprises: a polariscope, an optical rotator and an analyzing light microscopic; This manufacture method may further comprise the steps:
Align a polariscope, an optical rotator and an analyzing light microscopic in order vertically;
Set up the magnetic operating conditions of optoisolator, photosystem can be allowed in a light transmission on axially; And prevent along opposite shaft orientation, pass the light transmission of this photosystem;
To axially be applied to described polariscope towards one from the light of a LASER Light Source, and make this light pass described polariscope, optoisolator and analyzing light microscopic;
The light position standard that measurement is transmitted from described analyzing light microscopic; And
Insert loss and isolation at light, adjust described polariscope and analyzing light microscopic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96120342 CN1179548A (en) | 1996-10-16 | 1996-10-16 | Optical isolator and its making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96120342 CN1179548A (en) | 1996-10-16 | 1996-10-16 | Optical isolator and its making method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1179548A true CN1179548A (en) | 1998-04-22 |
Family
ID=5126276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96120342 Pending CN1179548A (en) | 1996-10-16 | 1996-10-16 | Optical isolator and its making method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1179548A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765267A (en) * | 2011-06-29 | 2014-04-30 | 古内化学株式会社 | Collimator and optical isolator with collimator |
| CN104035159A (en) * | 2014-06-25 | 2014-09-10 | 深圳市越海光通信科技有限公司 | Compact-type polarization-maintaining three-port optical circulator |
| CN110927881A (en) * | 2018-09-19 | 2020-03-27 | 苏州旭创科技有限公司 | Optical plug-in with isolator and optical module with optical plug-in |
-
1996
- 1996-10-16 CN CN 96120342 patent/CN1179548A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765267A (en) * | 2011-06-29 | 2014-04-30 | 古内化学株式会社 | Collimator and optical isolator with collimator |
| CN103765267B (en) * | 2011-06-29 | 2017-01-25 | 古内化学株式会社 | Collimator and optical isolator with collimator |
| CN104035159A (en) * | 2014-06-25 | 2014-09-10 | 深圳市越海光通信科技有限公司 | Compact-type polarization-maintaining three-port optical circulator |
| CN110927881A (en) * | 2018-09-19 | 2020-03-27 | 苏州旭创科技有限公司 | Optical plug-in with isolator and optical module with optical plug-in |
| CN110927881B (en) * | 2018-09-19 | 2021-06-18 | 苏州旭创科技有限公司 | Optical plug-in with isolator and optical module with optical plug-in |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5734762A (en) | Optical isolator system and method | |
| US4974944A (en) | Optical nonreciprocal device | |
| US6556733B2 (en) | Optical isolator and method for making same | |
| US5661829A (en) | Optical isolator | |
| EP0557542B1 (en) | Optical attenuator | |
| US6282339B1 (en) | Reliable low-cost wavelength division multiplexed coupler with flexible and precise optical path adjustment | |
| US4375910A (en) | Optical isolator | |
| US6907163B2 (en) | Multi-port optical coupling system | |
| CN1179548A (en) | Optical isolator and its making method | |
| AU750427B2 (en) | Multi-port optical isolator | |
| WO1986000718A1 (en) | Plural-channel optical rotary joint | |
| GB2031182A (en) | Optical waveguid arrangements | |
| US6347170B1 (en) | Low-cost wavelength division multiplexed (WDM) coupler with more flexible and precise optical faith adjustment | |
| US7474813B2 (en) | Connector mountable asymmetric free space optical isolators | |
| CA2130873C (en) | Method for assembling optical isolator and method for measuring isolation | |
| Koyabu et al. | Fabrication of two-dimensional fiber arrays using microferrules | |
| US6631220B1 (en) | Optical isolator | |
| Minowa et al. | Optical componentry utilized in field trial of single-mode fiber long-haul transmission | |
| US20020191881A1 (en) | Optical isolator | |
| JPH0827441B2 (en) | Optical isolator | |
| CN213042055U (en) | Card type lens system with coarse tracking and quantum key distribution system | |
| CN113376754A (en) | Fixed end cover and multi-path optical fiber rotary connector | |
| US20040184758A1 (en) | Ruggedized optical fiber collimator | |
| JP2000180789A (en) | Optical isolator | |
| CN219223935U (en) | Expandable multi-optical-path access device for optical fiber spectrometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1009494 Country of ref document: HK |