CN202221483U - Four-fiber optical fiber collimator - Google Patents
Four-fiber optical fiber collimator Download PDFInfo
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- CN202221483U CN202221483U CN2011203156371U CN201120315637U CN202221483U CN 202221483 U CN202221483 U CN 202221483U CN 2011203156371 U CN2011203156371 U CN 2011203156371U CN 201120315637 U CN201120315637 U CN 201120315637U CN 202221483 U CN202221483 U CN 202221483U
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- spherical lens
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Abstract
The utility model provides a four-fiber optical fiber collimator including a four-fiber optical fiber head, an optical micro lens and a connecting piece. The four-fiber optical fiber head and the optical micro lens are arranged coaxially and horizontally through the connecting piece. The four-optical fiber head is composed of a four-hole capillary tube and four fibers penetrating through the four-hole capillary tube horizontally. The four fibers are arranged successively from top down on the same vertical plane. The upper two fibers and the lower two fibers are in symmetry relatively to a central axis of a collimator respectively. The optical micro lens is a variable-curvature spherical lens. The variable-curvature spherical lens includes two parts of a scalene cylinder and a variable-curvature sphere. An inclined face of the scalene cylinder is an incoming face of the variable-curvature spherical lens. The variable-curvature sphere is formed by combining two spherical crowns having sphere radiuses of R1 and R2 respectively. The inner two optical fibers arranged symmetrical relatively to the central axis of the collimator are corresponding to the sphere having the radius of R1 while the outer two optical fibers are corresponding to the sphere having the radius of R2. The four-fiber optical fiber collimator in the utility model has a high integration degree and can realize an arrangement of single side ports. And the four-fiber optical fiber collimator can be processed conveniently and has a low cost.
Description
Technical field
The utility model relates to the optical fiber collimator that uses in a kind of optical fiber communication, relates in particular to a kind of four-fiber optical fiber collimating device that can be applicable in the optical add-drop multiplexer.
Background technology
Optical fiber collimator is an optical passive component commonly used in a kind of optical fiber communication.It can be with the divergent beams of fiber end face outgoing through the lenticule collimation, or parallel or divergent beams are coupled in the single-mode fiber through lenticule with the external world.
The most frequently used optical fiber collimator is the single fiber collimating apparatus at present, and is as shown in Figure 1.101 is optical fiber among the figure, and 102 is that optical fiber 101 glues together the optical fiber head that constitutes with the optical fiber kapillary, and 103 is optical microlens, and it can be graded index (GRIN) lens (or claiming GRIN Lens), spherical lens or non-spherical lens.104 for connecting the sleeve pipe of fixed fiber head 102 and optical microlens 103.Optical fiber head 102 exit facets and optical microlens 103 planes of incidence all are coated with antireflective film, and the optical axis of normal line of butt end and optical fiber has 6～12 ° inclination (being generally 8 °), to improve return loss.Optical fiber head 102 and optical microlens 103 are enclosed within sleeve pipe 104 the insides, accurately adjust the distance between optical fiber head 102 and the optical microlens 103, make the along that luminous point places optical microlens that of optical fiber head.Optical fiber head 102, optical microlens 103 respectively with glue and sleeve pipe 104 gummeds, are promptly processed the single fiber optical fiber collimator.The single fiber collimating apparatus also has other a kind of form, and it has removed the sleeve pipe 104 among Fig. 1, but with refractive index match glue that the plane of incidence of the exit facet of optical fiber head 102 and optical microlens 103 is bonding, to reach the fixing effect that connects.
Except above-mentioned single fiber collimating apparatus, in addition two fine collimating apparatuss commonly used, as shown in Figure 2.201 and 202 is optical fiber among the figure, and 203 is the optical fiber head of two unthreaded hole kapillary gummed formations of optical fiber 201 and 202 and one fixed intervals, and 204 is optical microlens, and it can be graded index (GRIN) lens, spherical lens or non-spherical lens.205 for connecting the sleeve pipe of fixed fiber head 203 and optical microlens 204.Optical fiber head 203 exit facets and optical microlens 204 planes of incidence all are coated with antireflective film, and 6～12 ° inclination (being generally 8 °) is arranged, to improve return loss.Optical fiber 201 converges at the lenticule front end through the directional light that optical microlens 204 backs produce with the emergent light of optical fiber 202.Optical fiber head 203 and optical microlens 204 are enclosed within sleeve pipe 205 the insides; Accurately adjust the distance between optical fiber head 203 and the optical microlens 204; Make the along that luminous point places optical microlens that of optical fiber head; With optical fiber head 203, optical microlens 204 and sleeve pipe 205 gummeds, promptly process two fiber optical fiber collimating devices at last.
Optical fiber collimator is the important devices of making optical add-drop multiplexer.Chinese patent " optical add/drop multiplexer " (CN 1481101A) is in input, output and divide down/and the insertion port respectively used a single fiber optical fiber collimator.Two fine collimating apparatuss also can be used for making optical add-drop multiplexer, such as, the OADM 101 A/D series of Oplink company, 3 port add/drop filters of Browave company and 3 port CWDM products of Koncent company.But no matter be to use single fiber collimating apparatus or two fine collimating apparatuss to make optical add-drop multiplexers, its input, output, insertion and branch lower port must be positioned at the both sides of device, cause the device architecture size inconvenience of controlling bigger than normal, actual.If use the single fiber collimating apparatus, because device increases, more can increase device assembling complexity, be difficult to guarantee serviceability.Chinese patent " four-fiber optical fiber collimating device " is a kind of four optical fiber collimators (CN101344616), and it has utilized a kind of graded index lenticule of special shape, though can realize the OADM of high integration, one-sided port, processing difficulties, cost is higher.
Summary of the invention
For overcome existing optical fiber collimator technology integrated level when the structure optical add-drop multiplexer low, can not realize shortcomings such as one-sided port, processing difficulties, cost height, high integration when the utility model proposes a kind of structure optical add-drop multiplexer, can realize one-sided port and easy to process, four-fiber optical fiber collimating device cheaply.
The utility model solves the technical scheme that its technical matters adopted:
A kind of four-fiber optical fiber collimating device; Comprise a four-fiber optical fiber head, an optical microlens and web member; Said four-fiber optical fiber head and optical microlens are through the coaxial horizontal arrangement of web member; All there are the inclination angle in the exit facet normal line of butt end of said four-fiber optical fiber head, the plane of incidence normal line of butt end of optical microlens with the optical axis of optical fiber; Said four-fiber optical fiber head is made up of four optical fiber that four hole kapillaries and level are located in the said four hole kapillaries, and described four optical fiber are arranged in order in same vertical plane from top to bottom, and middle two optical fiber are with two optical fiber are symmetrical up and down about said collimating apparatus central shaft respectively up and down; Said optical microlens is the variable curvature spherical lens; Said variable curvature spherical lens comprises scalene cylinder and variable curvature spheroid two parts, and the inclined-plane of scalene cylinder is the plane of incidence of variable curvature spherical lens, and the variable curvature spheroid is respectively R by radius of sphericity
1And R
2Two spherical crown be combined intos, be R about the axisymmetric inboard 2 optical fiber respective radii in collimating apparatus center
1Sphere, the 2 optical fiber respective radii in the outside are R
2Sphere.
Further, said web member is for connecting the sleeve pipe of said four-fiber optical fiber head and variable curvature spherical lens, and described four-fiber optical fiber head and variable curvature spherical lens are installed in the said sleeve pipe.
Or: said web member is the refractive index match glue that the plane of incidence of the exit facet of said optical fiber head and variable curvature spherical lens is bonding.
The exit facet normal line of butt end of said four-fiber optical fiber head, the plane of incidence normal line of butt end of variable curvature spherical lens all become 6～12 ° of inclination angles with the optical axis of optical fiber.
Preferably, the plane of incidence normal line of butt end of the exit facet normal line of butt end of said four-fiber optical fiber head, variable curvature spherical lens all becomes 8 ° of inclination angles with the optical axis of optical fiber.
The outgoing end face of said four-fiber optical fiber head is coated with antireflective film, and the incident end face of said variable curvature spherical lens is coated with antireflective film.
Described four optical fiber are glued in the perforate capillaceous of said four holes.
The emergent light of two optical fiber in said centre converges at variable curvature spherical lens front end through the directional light that the variable curvature spherical lens produces; Its angle is 2 α; The emergent light of two optical fiber converges at variable curvature spherical lens front end through the directional light that the variable curvature spherical lens produces up and down; Its angle is 2 β, the R of two spherical crowns in the said variable curvature spherical lens
1And R
2Value make 2 α=2 β.
The effect that structural design reached of said variable curvature spherical lens is: the angle of the light of two optical fiber outputs after through the variable curvature spherical lens up and down in the said optical fiber head is identical with the light of the middle two optical fiber output angle after through the variable curvature spherical lens.
The beneficial effect of the utility model mainly shows: the variable curvature spherical lens adopts and processes with a kind of homogeneous material, and making is simple, cost is low; When the utility model is used for optical add-drop multiplexer, can make input, output, divide down and the light path of inserting all in same plane, thereby simplify the structure greatly, reduced the difficulty that mechanical hook-up is debug; Above-mentioned four ports all are positioned at the same side of optical add-drop multiplexer, have not only reduced the physical dimension of optical add-drop multiplexer, also make things convenient for controlling of device; Adopt the optical add-drop multiplexer of the utility model can realize leading directly to, divide down and inserting of wavelength simultaneously.
Description of drawings
Fig. 1 is a prior art single fiber optical fiber collimator structural representation.
Fig. 2 is the two fiber optical fiber collimating device structural representations of prior art.
Fig. 3 is the structural representation of the utility model four-fiber optical fiber collimating device.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the structural representation of the described variable curvature spherical lens of the utility model.
Fig. 6 is the structural representation that adopts the optical add-drop multiplexer of the utility model.
Embodiment
Further describe below in conjunction with the embodiment of accompanying drawing the utility model.
Embodiment 1
With reference to Fig. 1～Fig. 6, a kind of four-fiber optical fiber collimating device comprises a four-fiber optical fiber head 305, a variable curvature spherical lens 306 and web member 307, and said four-fiber optical fiber head and variable curvature spherical lens are through the coaxial horizontal arrangement of web member.Said web member is for connecting the sleeve pipe 307 of said four-fiber optical fiber head and variable curvature spherical lens, and described four-fiber optical fiber head 305 is glued in the said sleeve pipe 307 with variable curvature spherical lens 306.
Said four-fiber optical fiber head 305 is made up of four optical fiber 301,302,303,304 that four hole kapillaries and level are located in the said four hole kapillaries; Described four optical fiber are glued in the perforate capillaceous of said four holes; Described four optical fiber are arranged in order in same vertical plane from top to bottom, and middle two optical fiber are with two optical fiber are symmetrical up and down about said collimating apparatus central shaft respectively up and down.The exit facet normal line of butt end of said four-fiber optical fiber head 305, the plane of incidence normal line of butt end of variable curvature spherical lens all become 6～12 ° of inclination angles with the optical axis of optical fiber, be preferably 8 ° of inclination angles.The exit facet end face of described optical fiber head 305, the plane of incidence end face of variable curvature spherical lens all are coated with antireflective film, to improve return loss.
With reference to Fig. 5, said variable curvature spherical lens 306 is the lens through particular design, comprises that length is scalene cylinder and variable curvature spheroid two parts of w.The inclined-plane of scalene cylinder is used to improve the return loss of four-fiber optical fiber collimating device, reduces the interference of reflected light signal to incident optical signal; The variable curvature spheroid is respectively R by radius of sphericity
1And R
2Two spherical crown be combined intos.About the axisymmetric inboard 2 optical fiber respective radii in collimating apparatus center is R
1Sphere, the 2 optical fiber respective radii in the outside are R
2Sphere.The incident end face of said curvature spherical lens is coated with antireflective film, to reduce echo.Optical fiber outgoing end face need place lens focus in object space place, just can make from the Gaussian beam of optical fiber outgoing to obtain collimation.In addition, the distance of fiber end face and lensed endface is near more, and beam divergence is just more little, and the encircled energy of light beam is just good more, therefore needs big refraction materials.
Among Fig. 3, middle two optical fiber 302 converge at variable curvature spherical lens front end with 303 the emergent light directional light through 306 generations of variable curvature spherical lens, and its angle is 2 α.Two optical fiber 301 and 304 emergent light converge at variable curvature spherical lens front end through the directional light that variable curvature spherical lens 306 produces up and down, and its angle is 2 β.R in the said variable curvature spherical lens
1And R
2Value should make 2 α=2 β.Optical fiber head 305 and variable curvature spherical lens 306 are enclosed within sleeve pipe 307 the insides; Accurately adjust the distance between optical fiber head 305 and the variable curvature spherical lens 306; With optical fiber head 305, variable curvature spherical lens 306 and sleeve pipe 307 gummeds, promptly process the utility model four-fiber optical fiber collimating device at last.
With reference to Fig. 6, adopt the optical add-drop multiplexer of the utility model four-fiber optical fiber collimating device, comprise the utility model four-fiber optical fiber collimating device, dielectric multi-layer optical thin film wave filter 308 and catoptron 309.Four optical fiber are followed successively by from top to bottom and insert optical fiber 301, input optical fibre 302, output optical fibre 303, divide optical fiber 304 down, in order to transmission send into (from) insertion of variable curvature spherical lens 306 and input (output and divide down) signal.
Said variable curvature spherical lens 306 utilizes the structure and the optical characteristics of its particular design, can guarantee that the ray trajectory under above-mentioned insertion, input, output and the branch all is positioned at same plane.
Incide the plated film face of said dielectric multi-layer optical thin film wave filter 308 through the input signal behind the variable curvature spherical lens 306 with special angle, the light wave of its reflection is as through connect signal.Through the insertion signal transmission from said dielectric multi-layer optical thin film wave filter 308 behind the variable curvature spherical lens 306; Incide on the catoptron 309; The light wave of its reflection overlaps with above-mentioned through connect signal through dielectric multi-layer optical thin film wave filter 308 backs once more; Form the output signal, get into then in the said variable curvature spherical lens 306 and propagate, get into output optical fibre 303 until propagating.As dividing signal down, the said catoptron 309 of directive, its reflecting light through behind the wave filter 308, are injected described variable curvature spherical lens 306 once more through the input lightwave signal of wave filter 308 transmissions, divide the optical fiber 304 of function down until propagating to get into to carry out.
A kind of preferred examples is described.With reference to Fig. 3 and Fig. 4, choosing lens material is infra-red material SRTIO
3, its refractive index n=2.284; Get cylinder length w=0.5mm, fibre core spacing d=0.2mm, then collimator diameter is a=5d=1mm; Getting spherical crown 1 xsect radius is h
1=d=0.2mm, spherical crown 2 xsect radiuses are h
2=5d/2=0.5mm; Work as R
1=0.37mm, R
2=3R
1Satisfy 2 α=2 β during=1.11mm, at this moment l
1=0.058599mm, l
2=0.1188mm.Utilize the propagation of RSOFT software simulation light field in this device; Can find: through behind the lens deflection has taken place from the Gaussian beam of medial and lateral optical fiber input; Its width has kept unanimity basically in communication process, the encircled energy of light beam has obtained good collimation more than 90%.
Embodiment 2
The difference of present embodiment and embodiment 1 is that said web member is with the exit facet of said optical fiber head and the bonding refractive index match glue of the plane of incidence of variable curvature spherical lens.
Other structures of present embodiment and implementation and embodiment 1 are identical.
Claims (7)
1. four-fiber optical fiber collimating device; Comprise a four-fiber optical fiber head, an optical microlens and web member; Said four-fiber optical fiber head and optical microlens are through the coaxial horizontal arrangement of web member; All there are the inclination angle in the exit facet normal line of butt end of said four-fiber optical fiber head, the plane of incidence normal line of butt end of optical microlens with the optical axis of optical fiber; Said four-fiber optical fiber head is made up of four optical fiber that four hole kapillaries and level are located in the said four hole kapillaries, and described four optical fiber are arranged in order in same vertical plane from top to bottom, and middle two optical fiber are with two optical fiber are symmetrical up and down about said collimating apparatus central shaft respectively up and down; It is characterized in that: said optical microlens is the variable curvature spherical lens; Said variable curvature spherical lens comprises scalene cylinder and variable curvature spheroid two parts, and the inclined-plane of scalene cylinder is the plane of incidence of variable curvature spherical lens, and the variable curvature spheroid is respectively R by radius of sphericity
1And R
2Two spherical crown be combined intos, be R about the axisymmetric inboard 2 optical fiber respective radii in collimating apparatus center
1Sphere, the 2 optical fiber respective radii in the outside are R
2Sphere.
2. four-fiber optical fiber collimating device as claimed in claim 1 is characterized in that: said web member is for connecting the sleeve pipe of said four-fiber optical fiber head and variable curvature spherical lens, and described four-fiber optical fiber head and variable curvature spherical lens are installed in the said sleeve pipe.
3. four-fiber optical fiber collimating device as claimed in claim 1 is characterized in that: said web member is with the exit facet of said optical fiber head and the bonding refractive index match glue of the plane of incidence of variable curvature spherical lens.
4. like the described four-fiber optical fiber collimating device of one of claim 1～3, it is characterized in that: the exit facet normal line of butt end of said four-fiber optical fiber head, the plane of incidence normal line of butt end of variable curvature spherical lens all become 6～12 ° of inclination angles with the optical axis of optical fiber.
5. four-fiber optical fiber collimating device as claimed in claim 4 is characterized in that: the exit facet normal line of butt end of said four-fiber optical fiber head, the plane of incidence normal line of butt end of variable curvature spherical lens all become 8 ° of inclination angles with the optical axis of optical fiber.
6. four-fiber optical fiber collimating device as claimed in claim 4 is characterized in that: the outgoing end face of said four-fiber optical fiber head is coated with antireflective film, and the incident end face of said variable curvature spherical lens is coated with antireflective film.
7. like the described four-fiber optical fiber collimating device of one of claim 1～3, it is characterized in that: described four optical fiber are glued in the perforate capillaceous of said four holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203156371U CN202221483U (en) | 2011-08-26 | 2011-08-26 | Four-fiber optical fiber collimator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203156371U CN202221483U (en) | 2011-08-26 | 2011-08-26 | Four-fiber optical fiber collimator |
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| Publication Number | Publication Date |
|---|---|
| CN202221483U true CN202221483U (en) | 2012-05-16 |
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ID=46043507
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203156371U Expired - Fee Related CN202221483U (en) | 2011-08-26 | 2011-08-26 | Four-fiber optical fiber collimator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842429A (en) * | 2017-02-16 | 2017-06-13 | 深圳市鹏大光电技术有限公司 | For the packaged lens fiber array and its manufacture method of the coupling of VSCEL or PIN arrays |
| CN110262056A (en) * | 2019-07-18 | 2019-09-20 | 昂纳信息技术（深圳）有限公司 | A kind of smooth filter, system and encapsulating structure |
| CN113917614A (en) * | 2021-09-15 | 2022-01-11 | 武汉光迅科技股份有限公司 | Optical module |
-
2011
- 2011-08-26 CN CN2011203156371U patent/CN202221483U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842429A (en) * | 2017-02-16 | 2017-06-13 | 深圳市鹏大光电技术有限公司 | For the packaged lens fiber array and its manufacture method of the coupling of VSCEL or PIN arrays |
| CN110262056A (en) * | 2019-07-18 | 2019-09-20 | 昂纳信息技术（深圳）有限公司 | A kind of smooth filter, system and encapsulating structure |
| CN113917614A (en) * | 2021-09-15 | 2022-01-11 | 武汉光迅科技股份有限公司 | Optical module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120516 Termination date: 20140826 |
|
| EXPY | Termination of patent right or utility model |