CN104035159A - Compact-type polarization-maintaining three-port optical circulator - Google Patents
Compact-type polarization-maintaining three-port optical circulator Download PDFInfo
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- CN104035159A CN104035159A CN201410293702.3A CN201410293702A CN104035159A CN 104035159 A CN104035159 A CN 104035159A CN 201410293702 A CN201410293702 A CN 201410293702A CN 104035159 A CN104035159 A CN 104035159A
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- polarization maintaining
- maintaining optical
- optical fibre
- compact
- collimation lens
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Abstract
The invention discloses a compact-type polarization-maintaining three-port optical circulator. The compact-type polarization-maintaining three-port optical circulator comprises a double-polarization-maintaining fiber collimator, a circulator core and a single-polarization-maintaining fiber collimator which are sequentially arranged from left to right; the double-polarization-maintaining fiber collimator comprises a first polarization-maintaining optical fiber, a third polarization-maintaining optical fiber, a double-fiber thin tube, a first collimating lens and a first fixed glass tube; the circulator core comprises a permanent magnetic ring and further comprises a Wollaston prism, a Faraday rotary optical plate and a polarizing film, and the Wollaston prism, the Faraday rotary optical plate and the polarizing film are sequentially fixed in the permanent magnetic ring from left to right; the single polarization-maintaining fiber collimator comprises a second polarization-maintaining optical fiber, a single-fiber thin tube, a second collimating lens and a second fixed glass tube. The compact-type polarization-maintaining three-port optical circulator is compact in structure, small in size, simple in manufacturing technology, low in assembling difficulty, low in cost and excellent in performance.
Description
Technical field
The present invention relates to fiber optic communication field, relate in particular to a kind of optical circulator.
Background technology
Along with optical fiber communication, the application of Fibre Optical Sensor in telecommunications, Aero-Space, navigation and industry manufacture field are more and more general, therefore also increasing to the demand of the various optical devices of optical fiber telecommunications system and optical fiber sensing system.This demand is not only the quantity increase in demand of sun adjuster part, and also the requirement of the aspects such as kind, performance, volume and cost of sun adjuster part is also more and more higher simultaneously.
In the fields such as optical fiber communication and Fibre Optical Sensor, circulator is as a kind of critical elements in optical passive component, it can carry out to the light of input and output the switching of nonreciprocity, namely have light forward conduction, oppositely end and the characteristic of other port that leads, can realize the separation of the light signal of forward and reverse transmission.In the fields such as therefore, circulator download in bidirectional optical fiber transmission communication system, optical wavelength, adjustable dispersion compensating, dynamic PMD compensation and dense wave division multipurpose, obtain a wide range of applications.Existing three port photocirculator bodies have complex process and the high in cost of production problem large, that assembling is made amassed; Do not there is the function of the polarizer simultaneously yet.
Summary of the invention
To the object of the invention is to propose in order addressing the above problem compact and to protect inclined to one side three ports light rings; This compact is protected inclined to one side three ports light rings compact conformations, and the technique that assembling is made is simple, and cost is low; There is super inclined to one side effect simultaneously, can significantly improve extinction ratio.
Technical scheme of the present invention is as follows:
The present invention is that compact is protected inclined to one side three ports light rings, and this compact is protected inclined to one side three ports light rings and comprised two polarization maintaining optical fiber collimators, circulator core and the single polarization maintaining optical fiber collimator of placing successively from left to right;
Described pair of polarization maintaining optical fiber collimator comprises the first polarization maintaining optical fibre, the 3rd polarization maintaining optical fibre, two optical fiber tubule, the first collimation lens and the first fixing glass pipe; Described the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre penetrate and are ground into 8 degree angles from the left side of two optical fiber tubules, the slow axis of the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre is orthogonal, the slow axis of the fibre core line of the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre and they self is perpendicular or parallel, the first polarization maintaining optical fibre is also vertical with the high low side of two optical fiber tubules with the fibre core line of the 3rd polarization maintaining optical fibre, and described the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre are fixed in two optical fiber tubules; In described the first fixing glass pipe, be fixed with successively from left to right two optical fiber tubules and the first collimation lens, and the right side of the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre is positioned on the back focal plane of the first collimation lens;
Described circulator core comprises magnet ring; Also comprise the wollaston prism, faraday rotator and the polaroid that are fixed on successively from left to right in described magnet ring; Described wollaston prism is comprised of two single axial birefringence crystal wedge gusset plates that optical axis is orthogonal and optical axis is vertical with incident light direction, and the anglec of rotation of described faraday rotator is 45 degree; The printing opacity direction of described polaroid becomes miter angle with the optical axis of described single axial birefringence crystal wedge gusset plate;
Described single polarization maintaining optical fiber collimator comprises the second polarization maintaining optical fibre, single fiber tubule, the second collimation lens and the second fixing glass pipe; Described the second polarization maintaining optical fibre penetrates and is ground into 8 degree angles from the right side of single fiber tubule, and described the second polarization maintaining optical fibre is fixed in single fiber tubule; In described the second fixing glass pipe, be fixed with successively from left to right the second collimation lens and single fiber tubule, and the left side of the second polarization maintaining optical fibre is positioned on the back focal plane of the second collimation lens.
More preferably, the right side of described the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre is polished polishing, and is coated with anti-reflection film.
More preferably, described the second polarization maintaining optical fibre left side is polished polishing, and is coated with anti-reflection film.
More preferably, described the first collimation lens is C-Lens.
More preferably, described the second collimation lens is C-Lens.
More preferably, each logical light end face of described the first collimation lens, the second collimation lens, wollaston prism, faraday rotator and polaroid is all coated with anti-reflection film.
More preferably, described compact is protected inclined to one side three ports light rings and is also comprised the 3rd fixing glass pipe, is fixed with successively from left to right two polarization maintaining optical fiber collimators, circulator core and single polarization maintaining optical fiber collimator in described the 3rd fixing glass pipe.
More preferably, described compact protect inclined to one side three ports light rings also comprise one for last encapsulation without magnetic metal tube.
Beneficial effect of the present invention:
1. described in, compact is protected the compact conformation of inclined to one side three ports light rings, and volume is little;
2. the introducing of polaroid makes described compact protect inclined to one side three ports light rings to have very high extinction ratio;
3. manufacture craft is simple, and assembly difficulty is low, and cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation that compact of the present invention is protected inclined to one side three ports light rings.
Embodiment
For better explanation the present invention, be now described further with accompanying drawing in conjunction with the embodiments.
As shown in Figure 1, compact of the present invention is protected inclined to one side three ports light rings and is comprised from left to right two polarization maintaining optical fiber collimators, circulator core and the single polarization maintaining optical fiber collimator of placing successively.
Described pair of polarization maintaining optical fiber collimator comprises the first polarization maintaining optical fibre 11, the 3rd polarization maintaining optical fibre 12, two optical fiber tubule 13, the first collimation lens 14 and the first fixing glass pipe 10; Described the first polarization maintaining optical fibre 11 and the 3rd polarization maintaining optical fibre 12 penetrate and are ground into 8 degree angles from the left side of two optical fiber tubules 13, the slow axis of the first polarization maintaining optical fibre 11 and the 3rd polarization maintaining optical fibre 12 is orthogonal, the slow axis of the fibre core line of the first polarization maintaining optical fibre 11 and the 3rd polarization maintaining optical fibre 12 and they self is perpendicular or parallel, the first polarization maintaining optical fibre 11 is also vertical with the high low side of two optical fiber tubules 13 with the fibre core line of the 3rd polarization maintaining optical fibre 12, and described the first polarization maintaining optical fibre 11 and the 3rd polarization maintaining optical fibre 12 stick with glue agent and be fixed in two optical fiber tubules 13; In described the first fixing glass pipe 10, stick with glue successively from left to right agent and be fixed with two optical fiber tubules 13 and the first collimation lens 14, and the right side of the first polarization maintaining optical fibre 11 and the 3rd polarization maintaining optical fibre 12 is positioned on the back focal plane of the first collimation lens 14; More preferably, the right side grinding and polishing of the first polarization maintaining optical fibre 11 and the 3rd polarization maintaining optical fibre 12, with inhibitory reflex light, and is plated to the performance of anti-reflection film to be optimized.The first collimation lens 14 can adopt C-Lens to obtain good collimation effect.
Described circulator core comprises magnet ring 30; Also comprise that sticking with glue successively from left to right agent is fixed on wollaston prism 31, faraday rotator 32 and the polaroid 33 in described magnet ring 30, described wollaston prism 31, faraday rotator 32 and polaroid 33 are close to; For obtaining good light splitting function and performance, described wollaston prism 31 is comprised of two single axial birefringence crystal wedge gusset plates that optical axis is orthogonal and optical axis is vertical with incident light direction, and the anglec of rotation of described faraday rotator 32 is 45 degree; The printing opacity direction of described polaroid 33 becomes miter angle with the optical axis of described single axial birefringence crystal wedge gusset plate; The introducing of polaroid 33 makes the present invention have very high extinction ratio.
Described single polarization maintaining optical fiber collimator comprises the second polarization maintaining optical fibre 21, single fiber tubule 22, the second collimation lens 23 and the second fixing glass pipe 20; Described the second polarization maintaining optical fibre 21 penetrates and is ground into 8 degree angles from the right side of single fiber tubule 22, sticks with glue agent the second polarization maintaining optical fibre 21 is fixed in single fiber tubule 22; In described the second fixing glass pipe 20, stick with glue successively from left to right agent and be fixed with the second collimation lens 23 and single fiber tubule 22, and the left side of the second polarization maintaining optical fibre 21 is positioned on the back focal plane of the second collimation lens 23.More preferably, the second polarization maintaining optical fibre 21 left side grinding and polishings, to resist reflected light, and are plated to the performance of anti-reflection film to be optimized.The second collimation lens 23 can adopt C-Lens to obtain good collimation effect.
For reducing light loss, each logical light end face of described the first collimation lens 14, the second collimation lens 23, wollaston prism 31, faraday rotator 32 and polaroid 33 is all coated with anti-reflection film.
Compact of the present invention is protected inclined to one side three ports light rings and is also comprised the 3rd fixing glass pipe 40, sticks with glue successively from left to right agent and be fixed with two polarization maintaining optical fiber collimators, circulator core and single polarization maintaining optical fiber collimator in described the 3rd fixing glass pipe 40; Also comprise one for last encapsulation without magnetic metal tube 50.
For concrete device involved in the present invention, also have some parameters to determine:
Described pair of optical fiber tubule 13 has the doubled via that can pierce into the first polarization maintaining optical fibre 11 and the second polarization maintaining optical fibre 12, and the axis of doubled via is parallel with the axis of two optical fiber tubules 13, and the distance between through-bore axis is made as d in pairs;
The first collimation lens 14 is all selected the same C-Lens with the second collimation lens 23, the focal length of the first collimation lens 14 and the second collimation lens 23 too, its focal length
wherein, R is the radius-of-curvature of the sphere of the first collimation lens 14 and the second collimation lens 23, and n is the refractive index of the first collimation lens 14 and the second collimation lens 23;
The subtended angle of the light of the first polarization maintaining optical fibre 11 and the 3rd polarization maintaining optical fibre 12 after the first collimation lens 14 is approximately
The angle [alpha] of the two-beam that wollaston prism 31 separates, according to the principle of high crystal optics, is approximately α=2arcsin (n
e-n
o) tg θ; Wherein, θ is the angle of wedge of two angle of wedge sheets of described wollaston prism 31, n
ethe refractive index of 31 pairs of non-ordinary lights of setted wavelength of wollaston prism, n
oit is the refractive index of 31 pairs of setted wavelength ordinary lights of wollaston prism.
When α=β, after wollaston prism 31 deviations, be coupled into smoothly the second polarization maintaining optical fibre 21 just making the light that enters from the first polarization maintaining optical fibre 11 by the first collimation lens 14 collimations; Equally also just can make the light entering from the second polarization maintaining optical fibre 21 after wollaston prism 31 deviations, be coupled into smoothly the 3rd polarization maintaining optical fibre 12 after the second collimation lens 23 collimations, thereby realize the function of circulator.Thus, can select the wedge angle of two angle of wedge sheets of described wollaston prism 31.
During concrete encapsulation, for guaranteeing efficient debugging and high-performance of the present invention, available multidimensional regulating system clamps respectively two polarization maintaining optical fiber collimators and single polarization maintaining optical fiber collimator, magnet ring 30 is enclosed within on the second collimation lens 23, and the geometric center that simultaneously makes to be fixed on the wollaston prism 31 in magnet ring 30 is positioned in the focus of the first collimation lens.Repeatedly tune afterwards circulator core, two polarization maintaining optical fiber collimator and single polarization maintaining optical fiber collimator, make the light efficient coupling entering from the slow axis of the first polarization maintaining optical fibre 11 enter the slow axis of the second polarization maintaining optical fibre 21, and make the light efficient coupling entering from the slow axis of the second polarization maintaining optical fibre 21 enter the 3rd polarization maintaining optical fibre 12 and there is good extinction ratio.After tuning, stick with glue agent magnet ring 30 and the second collimation lens 23 is fixing; Two polarization maintaining optical fiber collimators, circulator core and single polarization maintaining optical fiber collimator being sticked with glue to agent is fixed in the 3rd fixing glass pipe 40 and carries out encapsulation process again; Finally with one shield without magnetic metal tube 50, carry out outer package.
Claims (8)
1. compact is protected inclined to one side three ports light rings, it is characterized in that: comprise two polarization maintaining optical fiber collimators, circulator core and the single polarization maintaining optical fiber collimator placed successively from left to right;
Described pair of polarization maintaining optical fiber collimator comprises the first polarization maintaining optical fibre, the 3rd polarization maintaining optical fibre, two optical fiber tubule, the first collimation lens and the first fixing glass pipe; Described the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre penetrate and are ground into 8 degree angles from the left side of two optical fiber tubules, the slow axis of the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre is orthogonal, the slow axis of the fibre core line of the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre and they self is perpendicular or parallel, the first polarization maintaining optical fibre is also vertical with the high low side of two optical fiber tubules with the fibre core line of the 3rd polarization maintaining optical fibre, and described the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre are fixed in two optical fiber tubules; In described the first fixing glass pipe, be fixed with successively from left to right two optical fiber tubules and the first collimation lens, and the right side of the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre is positioned on the back focal plane of the first collimation lens;
Described circulator core comprises magnet ring; Also comprise the wollaston prism, faraday rotator and the polaroid that are fixed on successively from left to right in described magnet ring; Described wollaston prism is comprised of two single axial birefringence crystal wedge gusset plates that optical axis is orthogonal and optical axis is vertical with incident light direction, and the anglec of rotation of described faraday rotator is 45 degree; The printing opacity direction of described polaroid becomes miter angle with the optical axis of described single axial birefringence crystal wedge gusset plate;
Described single polarization maintaining optical fiber collimator comprises the second polarization maintaining optical fibre, single fiber tubule, the second collimation lens and the second fixing glass pipe; Described the second polarization maintaining optical fibre penetrates and is ground into 8 degree angles from the right side of single fiber tubule, and described the second polarization maintaining optical fibre is fixed in single fiber tubule; In described the second fixing glass pipe, be fixed with successively from left to right the second collimation lens and single fiber tubule, and the left side of the second polarization maintaining optical fibre is positioned on the back focal plane of the second collimation lens.
2. compact as claimed in claim 1 is protected inclined to one side three ports light rings, it is characterized in that: the right side of described the first polarization maintaining optical fibre and the 3rd polarization maintaining optical fibre is polished polishing, and is coated with anti-reflection film.
3. compact as claimed in claim 1 is protected inclined to one side three ports light rings, it is characterized in that: described the second polarization maintaining optical fibre left side is polished polishing, and is coated with anti-reflection film.
4. compact as claimed in claim 1 is protected inclined to one side three ports light rings, it is characterized in that: described the first collimation lens is C-Lens.
5. compact as claimed in claim 1 is protected inclined to one side three ports light rings, it is characterized in that: described the second collimation lens is C-Lens.
6. compact as claimed in claim 1 is protected inclined to one side three ports light rings, it is characterized in that: each logical light end face of described the first collimation lens, the second collimation lens, wollaston prism, faraday rotator and polaroid is all coated with anti-reflection film.
7. compact as claimed in claim 1 is protected inclined to one side three ports light rings, it is characterized in that: also comprise the 3rd fixing glass pipe, in described the 3rd fixing glass pipe, be fixed with successively from left to right two polarization maintaining optical fiber collimators, circulator core and single polarization maintaining optical fiber collimator.
8. compact as claimed in claim 7 is protected inclined to one side three ports light rings, it is characterized in that: also comprise one for last encapsulation without magnetic metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293702.3A CN104035159A (en) | 2014-06-25 | 2014-06-25 | Compact-type polarization-maintaining three-port optical circulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293702.3A CN104035159A (en) | 2014-06-25 | 2014-06-25 | Compact-type polarization-maintaining three-port optical circulator |
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| CN1179548A (en) * | 1996-10-16 | 1998-04-22 | 魁洛光电科技股份有限公司 | Optical isolator and its making method |
| CN2482105Y (en) * | 2001-06-07 | 2002-03-13 | 福建华科光电有限公司 | Circulator |
| CN1450371A (en) * | 2002-04-09 | 2003-10-22 | 奥普林克通信公司 | Three-port circulator |
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| CN2609001Y (en) * | 2003-03-06 | 2004-03-31 | 珠海保税区光联通讯技术有限公司 | Three-port circulator |
| CN2631130Y (en) * | 2003-04-24 | 2004-08-04 | 珠海保税区光联通讯技术有限公司 | Bias-retaining circulator |
| CN2807288Y (en) * | 2005-04-15 | 2006-08-16 | 北京航空航天大学 | Micro optics optical fibre ring-shaped device |
| US7362504B2 (en) * | 2002-02-06 | 2008-04-22 | Lightwave 2020, Inc. | Miniature circulator devices and methods for making the same |
| CN201331599Y (en) * | 2008-12-29 | 2009-10-21 | 飞康技术(深圳)有限公司 | Optical fiber connecting device |
| CN202548363U (en) * | 2012-03-19 | 2012-11-21 | 光越科技(深圳)有限公司 | Four-port circulator |
| CN202956502U (en) * | 2012-11-27 | 2013-05-29 | 福州高意通讯有限公司 | Optical circulator |
| CN202975391U (en) * | 2012-10-10 | 2013-06-05 | 光越科技(深圳)有限公司 | Multifunctional high power device |
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2014
- 2014-06-25 CN CN201410293702.3A patent/CN104035159A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179548A (en) * | 1996-10-16 | 1998-04-22 | 魁洛光电科技股份有限公司 | Optical isolator and its making method |
| CN2482105Y (en) * | 2001-06-07 | 2002-03-13 | 福建华科光电有限公司 | Circulator |
| US7362504B2 (en) * | 2002-02-06 | 2008-04-22 | Lightwave 2020, Inc. | Miniature circulator devices and methods for making the same |
| CN1450371A (en) * | 2002-04-09 | 2003-10-22 | 奥普林克通信公司 | Three-port circulator |
| CN1470893A (en) * | 2002-06-04 | 2004-01-28 | �����ֿ�ͨ�Ź�˾ | Three-port polarisation-retaining circulator with isolation function |
| CN2609001Y (en) * | 2003-03-06 | 2004-03-31 | 珠海保税区光联通讯技术有限公司 | Three-port circulator |
| CN2631130Y (en) * | 2003-04-24 | 2004-08-04 | 珠海保税区光联通讯技术有限公司 | Bias-retaining circulator |
| CN2807288Y (en) * | 2005-04-15 | 2006-08-16 | 北京航空航天大学 | Micro optics optical fibre ring-shaped device |
| CN201331599Y (en) * | 2008-12-29 | 2009-10-21 | 飞康技术(深圳)有限公司 | Optical fiber connecting device |
| CN202548363U (en) * | 2012-03-19 | 2012-11-21 | 光越科技(深圳)有限公司 | Four-port circulator |
| CN202975391U (en) * | 2012-10-10 | 2013-06-05 | 光越科技(深圳)有限公司 | Multifunctional high power device |
| CN202956502U (en) * | 2012-11-27 | 2013-05-29 | 福州高意通讯有限公司 | Optical circulator |
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Application publication date: 20140910 |