CN102540360A - Optical fiber coupling head - Google Patents

Optical fiber coupling head Download PDF

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Publication number
CN102540360A
CN102540360A CN2010106168436A CN201010616843A CN102540360A CN 102540360 A CN102540360 A CN 102540360A CN 2010106168436 A CN2010106168436 A CN 2010106168436A CN 201010616843 A CN201010616843 A CN 201010616843A CN 102540360 A CN102540360 A CN 102540360A
Authority
CN
China
Prior art keywords
optical fiber
laser
coupling head
fiber coupling
cylindrical lens
Prior art date
Application number
CN2010106168436A
Other languages
Chinese (zh)
Inventor
樊仲维
唐熊忻
邱基斯
张晶
张国新
Original Assignee
北京国科世纪激光技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 北京国科世纪激光技术有限公司 filed Critical 北京国科世纪激光技术有限公司
Priority to CN2010106168436A priority Critical patent/CN102540360A/en
Publication of CN102540360A publication Critical patent/CN102540360A/en

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Abstract

The invention provides a laser-to-optical-fiber coupling head, which is used for coupling laser emitted by the laser to the optical fiber. The laser-to-optical-fiber coupling head includes a cylindrical lens, wherein the cylindrical lens includes a first bottom surface, a second bottom surface and a side surface; the first bottom surface is a convex surface with first curvature radius; the second bottom surface is a concave surface with second curvature radius; the side face is connected with the first bottom surface and the second bottom surface respectively; the centers of the first bottom surface and the second bottom surface are on the same straight line; and the first curvature radius, the second curvature radius and the length of the side surface are mutually matched, so that incident laser from the convex surface is refracted to the concave surface completely. According to the manner, the laser-to-optical-fiber coupling head has the advantages of simplicity in assembly, low cost and high reliability.

Description

Optical fiber coupling head

[technical field]

The present invention relates to a kind of optical fiber coupling head, and be particularly related to the coupling head of a kind of laser to optical fiber.

[background technology]

When the laser of laser instrument generation need utilize optical fiber to transmit; Because the hot spot bore that laser had that laser instrument produces tends to different with the fiber core radius of optical fiber; The laser that therefore, need utilize coupling head to make laser instrument penetrate can import in the optical fiber.

In the prior art, generally use lens combination to realize coupling function, promptly utilize a plurality of lens that the parallel laser that laser instrument penetrates is assembled with different curvature radius; But because employed aperture of lens is the same; Thickness is similar again, therefore, and in the process that coupling head is installed; Easily that the order dress of eyeglass is wrong, cause the coupling result to occur than large deviation.Simultaneously, the thinner thickness of eyeglass in the process that coupling head is installed, makes eyeglass generation deformation when pressing tightly easily, causes the coupling precise decreasing.And more to use transition rings between lens and the lens, cause forming comparatively numerous and diverse.In addition, owing to process a plurality of transition rings, and, because multi-disc lens meeting radius-of-curvature is different, cause making comparatively complicated.In addition, prior art more has the higher deficiency of cost.

Therefore, to the existing all deficiencies of prior art scheme, a kind of laser-optical fiber coupling head need be provided, to solve above technical matters.

[summary of the invention]

The technical matters that the present invention solves provides a kind of optical fiber coupling head.

The present invention for the technical scheme that the technical solution problem adopts is: a kind of optical fiber coupling head is provided; Being used for will be from the laser coupled of laser emitting to optical fiber; Laser-optical fiber coupling head comprises: a cylindrical lens; Cylindrical lens comprises: one first bottom surface comprises a convex surface with first curvature radius; One second bottom surface comprises a concave surface with second curvature radius; A side connects first bottom surface and second bottom surface respectively; The length of the first curvature radius of said convex surface, the second curvature radius of said concave surface and said side is worked in coordination, and makes all to be refracted to said concave surface from the laser of said convex surface incident.

The preferred embodiment one of according to the present invention, the material of cylindrical lens is glass BK7.

The preferred embodiment one of according to the present invention, described optical fiber coupling head further comprises housing, and housing comprises cylindrical containing cavity, and cylindrical containing cavity cooperates with the cylindrical lens size, and cylindrical lens is contained in the containing cavity.

The preferred embodiment one of according to the present invention, described housing further comprises delivery outlet, and the center of delivery outlet and the center of concave surface are on same straight line, and the radius of delivery outlet is greater than the radius of concave surface, and delivery outlet is used for optical fibre.

The preferred embodiment one of according to the present invention, described housing further comprises the input port, and the center of the center of input port and the convex surface of cylindrical lens is on same straight line, and laser beam enters into cylindrical lens through the input port.

The preferred embodiment one of according to the present invention, described optical fiber coupling head further comprises trim ring, trim ring cooperates with the input port size, is placed in the input port, is used for fixing cylindrical lens.

The preferred embodiment one of according to the present invention, the material of described housing is a brass.

By the way, optical fiber coupling head provided by the invention has the advantage that installation is simple, cost is lower and reliability is high.

[description of drawings]

Fig. 1 is the schematic perspective view of disclosed laser-optical fiber coupling head;

Fig. 2 is the sectional view of disclosed laser-optical fiber coupling head;

Fig. 3 is the index path of disclosed laser-optical fiber coupling head;

Fig. 4 is the index path according to the laser-optical fiber coupling head of first embodiment of the invention;

Fig. 5 is the structural representation according to the recessed optical fiber coupling head of laser of second embodiment of the invention; And

Fig. 6 is the application synoptic diagram of disclosed laser-optical fiber coupling head.

[embodiment]

Relevant characteristic of the present invention and technology contents please refer to following detailed description and accompanying drawing, and accompanying drawing only provides reference and explanation, are not to be used for the present invention is limited.

Disclosed optical fiber coupling head be used for from the laser coupled of laser emitting to optical fiber, can make after via laser-optical fiber coupling head of the present invention, to become the laser that has than the small light spot bore from the laser that has than the large spot bore of laser emitting.

At first see also Fig. 1, Fig. 1 is the schematic perspective view of disclosed laser-optical fiber coupling head.As shown in Figure 1, disclosed optical fiber coupling head comprises cylindrical lens 100, and it comprises: first bottom surface (unmarked), second bottom surface (unmarked) and side 101.Wherein, described first bottom surface comprises a convex surface 102, and described second bottom surface comprises a concave surface 103, and described side 101 connects first bottom surface and second bottom surface respectively, and the center of described convex surface 102 and described concave surface 103 is on same straight line.

It should be noted that in a preferred embodiment of the invention the material of described cylindrical lens 100 is preferably glass BK7.

See also Fig. 2, Fig. 2 is the sectional view of disclosed laser-optical fiber coupling head.As shown in Figure 2, described convex surface 102 has first curvature radius R, and described concave surface 103 has second curvature radius r.In a preferred embodiment of the invention; Length L through adjustment first curvature radius R, second curvature radius r and side can make and all be refracted to concave surface 103 from the laser of convex surface 102 incidents; And laser reflects on concave surface 103 once more, thereby makes laser get into optical fiber.

Described column type lens 100 can be set the length L three's of its first curvature radius R, second curvature radius r and described side concrete numerical value by optical design software, to guarantee all to be refracted to described concave surface 103 from the laser of described convex surface 102 incidents.

Please further referring to Fig. 3, Fig. 3 is the index path of disclosed laser-optical fiber coupling head.As shown in Figure 3; Parallel laser gets into described convex surface 102 from left direction; On described convex surface 102, carry out the refraction first time; The described concave surface 103 of the whole directives of laser after refraction for the first time, and, become convergent laser after the refraction second time of described concave surface 103, penetrating from described concave surface 103.

See also Fig. 4, Fig. 4 is the index path according to the laser-optical fiber coupling head of first embodiment of the invention.As shown in Figure 4; In the first embodiment of the present invention, be that 532nm, spot diameter F are that the laser coupled of 10mm is in the optical fiber of core diameter 800 μ m, before inciding convex surface 102 with wavelength; The spot diameter F of laser is 10mm; And after the refraction second time of the refraction first time of process convex surface 102 and concave surface 103, the spot diameter E of laser becomes 0.7mm, can be coupled in the optical fiber that core diameter is 800 μ m to transmit.It should be noted that in the present embodiment first curvature radius R is 10mm; Second curvature radius r is 1.1mm, and the length L of side 101 is 25mm, and height H is 14mm; Its concrete numerical value can be provided with gained by optical design software; When can not guaranteeing that the laser from convex surface 102 incidents all is refracted to concave surface 103, and when on concave surface 103, reflecting once more, can carry out emulation through optical design software; The concrete numerical value of one or more among the length L three of adjustment first curvature radius R, second curvature radius r and side; Guaranteeing all to be refracted to concave surface 103, and on concave surface 103, reflect once more, make from concave surface 103 emitting lasers to be converging light from the laser of convex surface 102 incidents.

See also Fig. 5, Fig. 5 is the structural representation according to the laser-optical fiber coupling head of second embodiment of the invention.As shown in Figure 5, disclosed laser-optical fiber coupling head 210 can further comprise housing 204 and trim ring 205.

Wherein, described housing 204 comprises cylindrical containing cavity 206, and described cylindrical containing cavity 206 cooperates with described cylindrical lens 200 sizes, and described cylindrical lens 200 is contained in the described cylindrical containing cavity 206.Described housing 204 also comprises input port 207 and delivery outlet 208, and the center of the center of input port 207 and convex surface 202 is on same straight line, and cylindrical lens 200 is placed in the cylindrical containing cavity 206 via input port 207.The center of the center of delivery outlet 208 and concave surface 203 is on same straight line, and the radius of delivery outlet 208 is greater than the radius of concave surface 203, and optical fiber 209 is placed in the delivery outlet 208.

And trim ring 205 cooperates with input port 207 sizes, and trim ring 205 is placed in the input port 207, is used for fixing cylindrical lens 200.

Therefore, when disclosed laser-optical fiber coupling head is installed, can cylindrical lens 200 directly be placed in housing 204, and utilizes trim ring 205 that cylindrical lens 200 is pressed in the housing 204, thus holding cylindrical lens 200.Above mounting means is very convenient, and simple to operate.

It should be noted that in a preferred embodiment of the invention the material of housing 204 is preferably brass.

See also Fig. 6, Fig. 6 is the application synoptic diagram of the laser-optical fiber coupling head of second enforcement according to the present invention.As shown in Figure 6, disclosed laser-optical fiber coupling head 210 specifically is applied between laser instrument 211 and the optical fiber 209, and the parallel laser that laser instrument 211 penetrates couples directly to optical fiber 209 via laser-optical fiber coupling head 210.

Through above setting; Technical scheme provided by the present invention has designed the used eyeglass of laser-optical fiber coupling head again; Utilize a cylindrical lens to substitute the combination of multi-disc lens; Simplified the structure of laser coupled, reduced production cost, made the process of installation laser-optical fiber coupling head become extremely simple and be difficult for making eyeglass to produce deformation simultaneously to optical fiber coupling head.In addition, because cylindrical lens has thicker thickness, therefore when installation is squeezed, be difficult for deformation takes place, thereby guaranteed reliability.Therefore, laser-optical fiber coupling head provided by the invention has the advantage that installation is simple, cost is lower and reliability is high.

Above with reference to description of drawings various preferred embodiments of the present invention, but only otherwise deviate from essence of the present invention and scope, those skilled in the art can carry out modification and change on the various forms to it, all belongs to protection scope of the present invention.

Claims (7)

1. optical fiber coupling head, be used for from the laser coupled of laser emitting to optical fiber, it is characterized in that said optical fiber coupling head comprises:
A cylindrical lens, said cylindrical lens comprises:
One first bottom surface comprises a convex surface with first curvature radius;
One second bottom surface comprises a concave surface with second curvature radius;
A side connects said first bottom surface and said second bottom surface respectively;
Wherein, the center of said convex surface and said concave surface is on same straight line, and the length of the first curvature radius of said convex surface, the second curvature radius of said concave surface and said side is worked in coordination, and makes all to be refracted to said concave surface from the laser of said convex surface incident.
2. optical fiber coupling head according to claim 1 is characterized in that, the material of said cylindrical lens is glass BK7.
3. optical fiber coupling head according to claim 1; It is characterized in that said laser-optical fiber coupling head further comprises housing, said housing comprises cylindrical containing cavity; Said cylindrical containing cavity cooperates with said cylindrical lens size, and said cylindrical lens is contained in the said containing cavity.
4. optical fiber coupling head according to claim 3; It is characterized in that said housing further comprises delivery outlet, the center of said delivery outlet and the center of said concave surface are on same straight line; The radius of said delivery outlet is greater than the radius of said concave surface, and said delivery outlet is used for optical fibre.
5. optical fiber coupling head according to claim 4; It is characterized in that; Said housing further comprises the input port, and the center of the center of said input port and the convex surface of said cylindrical lens is on same straight line, and laser beam enters into said cylindrical lens through said input port.
6. optical fiber coupling head according to claim 5 is characterized in that said laser-optical fiber coupling head further comprises trim ring, and said trim ring cooperates with said input port size, is placed in the said input port, is used for fixing said cylindrical lens.
7. optical fiber coupling head according to claim 3 is characterized in that, the material of said housing is a brass.
CN2010106168436A 2010-12-31 2010-12-31 Optical fiber coupling head CN102540360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010106168436A CN102540360A (en) 2010-12-31 2010-12-31 Optical fiber coupling head

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Application Number Priority Date Filing Date Title
CN2010106168436A CN102540360A (en) 2010-12-31 2010-12-31 Optical fiber coupling head

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CN102540360A true CN102540360A (en) 2012-07-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104216070A (en) * 2013-05-30 2014-12-17 恩普乐股份有限公司 Optical socket and optical module containing same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2173414Y (en) * 1993-06-12 1994-08-03 华中理工大学 Semiconductor laser straight corrector
CN1711487A (en) * 2002-11-12 2005-12-21 安捷伦科技有限公司 Optical lenses
US20090226133A1 (en) * 2008-03-04 2009-09-10 Jds Uniphase Corporation Low-noise optical transmitter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2173414Y (en) * 1993-06-12 1994-08-03 华中理工大学 Semiconductor laser straight corrector
CN1711487A (en) * 2002-11-12 2005-12-21 安捷伦科技有限公司 Optical lenses
US20090226133A1 (en) * 2008-03-04 2009-09-10 Jds Uniphase Corporation Low-noise optical transmitter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104216070A (en) * 2013-05-30 2014-12-17 恩普乐股份有限公司 Optical socket and optical module containing same
CN104216070B (en) * 2013-05-30 2018-01-23 恩普乐股份有限公司 Optical receptacle and the optical module with this optical receptacle

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Application publication date: 20120704