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CN101013187A - Optical fibre coupling device of multiple beam laser concave surface reflecting mirror - Google Patents

Optical fibre coupling device of multiple beam laser concave surface reflecting mirror Download PDF

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Publication number
CN101013187A
CN101013187A CN 200710004928 CN200710004928A CN101013187A CN 101013187 A CN101013187 A CN 101013187A CN 200710004928 CN200710004928 CN 200710004928 CN 200710004928 A CN200710004928 A CN 200710004928A CN 101013187 A CN101013187 A CN 101013187A
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optical fiber
coupling
fiber
reflectors
coupling device
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CN100456070C (en
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马晓辉
史全林
徐莉
王玲
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Changchun Hi Tech Co Ltd
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Changchun University of Science and Technology
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Abstract

多束激光凹面反射镜光纤耦合装置是一种采用了凹面反射镜实现来自多只单发射区激光二极管的激光与一根光纤耦合的装置，属于激光光纤耦合技术领域。现有技术采用聚焦透镜组实现多束激光与单根光纤的耦合，其不足是结构复杂，聚焦透镜组由包括柱面透镜在内的至少三个透镜组成；调整困难，需要反复、精确地调整多个一级反射镜、二级反射镜以及各透镜。本发明采用多个光纤柱透镜、多个平面反射镜以及凹面反射镜，光纤的端面位于凹面反射镜的曲率中心，多束发散的光束经准直、反射、聚焦后与光纤耦合。结构简单、调整容易，并保证了大功率输出、耦合效率。可应用于大功率半导体激光与光纤耦合技术领域。

Figure 200710004928

A multi-beam laser concave reflector fiber coupling device is a device that uses a concave reflector to realize the coupling of lasers from multiple single-emitting laser diodes with an optical fiber, and belongs to the technical field of laser fiber coupling. The prior art uses a focusing lens group to realize the coupling of multiple laser beams and a single optical fiber. The disadvantage is that the structure is complex. The focusing lens group is composed of at least three lenses including cylindrical lenses; adjustment is difficult and requires repeated and precise adjustments A plurality of primary reflectors, secondary reflectors and lenses. The invention adopts a plurality of optical fiber cylindrical lenses, a plurality of plane reflectors and concave reflectors, the end face of the optical fiber is located at the curvature center of the concave reflector, and multiple divergent light beams are collimated, reflected and focused and then coupled with the optical fiber. The structure is simple, easy to adjust, and ensures high power output and coupling efficiency. It can be applied in the field of high-power semiconductor laser and fiber coupling technology.

Figure 200710004928

Description

Optical fibre coupling device of multiple beam laser concave surface reflecting mirror
Technical field
The present invention is that a kind of concave mirror that adopted is realized belonging to laser fiber coupling technique field from the device of many single transmit district laser diodes and an optical fiber coupling.
Background technology
The general continuous output of the luminous power of single high power laser diode also has only 4 watts, in order to obtain more high-power output, and with an optical fiber coupling, its scheme of a kind of prior art is seen shown in Figure 1, stepped equally distributed a plurality of single transmit district laser diode LD 1, LD 2, LD 3..., LD nEmission wavelength is the laser of λ respectively, respectively through a plurality of first order reflection mirror M 1, M 2, M 3..., M nReflex to secondary reflex mirror 1, reflex to optical system 2 through secondary reflex mirror 1 again, focus on back and optical fiber 3 couplings.Optical system 2 is focus lens group, and its effect is with multi beam and the laser focusing dispersed, with end face diameter be optical fiber 3 couplings of hundreds of micron number magnitude.The light beam that this device can send many single transmit district laser diodes and simple optical fiber coupling and output, thus can realize more high-power output; Because each laser diode LD location interval is bigger, thereby be easy to heat radiation, the reliability and the life-span of having improved laser diode; Coupling efficiency can reach 60%.
Summary of the invention
The problem that prior art exists at first is a complex structure, shows that on the employed optical system 2, this system is made up of three lens that comprise cylindrical lens at least.Next is to adjust difficulty, a plurality of first order reflection mirror M 1, M 2, M 3..., M nPosition and angle, the position of secondary reflex mirror 1 and angle, and the position of inner each lens of optical system 2 etc. be one group relevant, directly influence the factor of coupling efficiency, need repeatedly, accurately adjust, can realize the coupling of greater efficiency.In order to simplify the device of multiple laser and optical fiber coupling, be easy to adjust, and have higher coupling efficiency, we have invented the present invention's optical fibre coupling device of multiple beam laser concave surface reflecting mirror.
The present invention is achieved in that and sees shown in Figure 2ly that this installs by a plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL n, a plurality of plane mirror PM 1, PM 2, PM 3..., PM nAnd concave mirror 4 is formed a plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL nBe separately positioned on a plurality of single transmit district laser diode LD 1, LD 2, LD 3..., LD nBright dipping place, a plurality of plane mirror PM 1, PM 2, PM 3..., PM nBe separately positioned on a plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL nThe top, word order and all tilt 44～46 the degree angles, the reflecting surface of concave mirror 4 with from a plurality of plane mirror PM 1, PM 2, PM 3..., PM nFolded light beam relative, concave mirror 4 is 1～5 degree with the angle α of vertical direction, the end face of optical fiber 3 is positioned at the center of curvature O of concave mirror 4.
A plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL nFormed by fiber cut, and compare by the cylindrical lens of optics processing and fabricating, make easily, its effect is to a plurality of single transmit district laser diode LD 1, LD 2, LD 3..., LD nSend " fast axle " angle of divergence of light beam and compress, realize the collimation of light beam, be beneficial to the raising of coupling efficiency.A plurality of plane mirror PM 1, PM 2, PM 3..., PM nEffect be to change the direction of propagation of light beam, each light beam is projected on the reflecting surface of concave mirror 4.Concave mirror 4 with multi-beam reflection and when focusing on the end face of optical fiber 3 on " slow axis " direction the every Shu Guang of compression.The present invention's device final effect shows, is the laser diode of 100 μ m when adopting the launch site width, and when optical fiber 3 core diameters were 100 μ m, coupling efficiency can reach 80%.The power of single laser diode is 4 watts, and when selecting 5 for use, then output power can reach 16 watts.A plurality of single transmit district laser diode LD 1, LD 2, LD 3..., LD nDistribution in device is same as the prior art, and stepped even distribution is so thereby still have long characteristics of good heat dissipation life-span.Guaranteeing under coupling efficiency, output power and the brightness and the prerequisite in a plurality of laser diode life-span that this device simple in structure is by a plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL nFinish the collimation and the focusing of light beam with concave mirror 4, replaced the secondary reflex mirror 1 and the optical system 2 of prior art.And, a plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL nOnly need be placed on a plurality of laser diode LDs respectively 1, LD 2, LD 3..., LD nAdjust a little before the output beam and get final product; A plurality of plane mirror PM 1, PM 2, PM 3..., PM nInclined degree also only need in 44～46 degree scopes, roughly to adjust beam reflection got final product to the reflecting surface of concave mirror 4; In the scope of 1～5 degree, adjust concave mirror 4 with the angle α of vertical direction, the end face of falling optical fiber 3 up to its center of curvature gets final product.The adjustment of the present invention's device is simple than prior art thus.
Description of drawings
Fig. 1 is the coupling device structure and the light path synoptic diagram of prior art.Fig. 2 is the present invention's coupling device structure and a light path synoptic diagram, and this figure is simultaneously as Figure of abstract.
Embodiment
Specific embodiments of the present invention is still seen shown in Figure 2, and this installs by a plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL n, a plurality of plane mirror PM 1, PM 2, PM 3..., PM nAnd concave mirror 4 is formed.A plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL nForm by the fiber cut that numerical aperture is 0.22, core diameter is 200 μ m, be separately positioned on a plurality of laser diode LDs in a plurality of single transmit district 1, LD 2, LD 3..., LD nBright dipping place.A plurality of laser diode LDs 1, LD 2, LD 3..., LD nThe launch site size be 1 μ m * 100～200 μ m, optical fiber 3 core diameters are greater than the width that equals the laser diode LD launch site; Stepped even distribution, promptly in the xy plane between the adjacent laser diode LD horizontal range difference Dx equate with vertical range difference Dy, thereby guarantee that every laser diode LD emitted light beams arrives the equivalent optical path of the reflecting surface of concave mirror 4, its relation can be represented by the formula:
L 11+L 12＝L 21+L 22＝L 31+L 32＝…＝L n1+L n2
To realize converging of multi-beam.A plurality of plane mirror PM 1, PM 2, PM 3..., PM nBe separately positioned on a plurality of optical fiber cylinder lens CL 1, CL 2, CL 3..., CL nThe top, word order, its degree of tilt angle is adjusted in 44～46 degree scopes, when making folded light beam all project on the reflecting surface of concave mirror 4, can also obtain L 11+ L 12≈ L 1, L 21+ L 22≈ L 2, L 31+ L 32≈ L 3..., Ln 1+ Ln 2The effect of ≈ Ln.The reflecting surface of concave mirror 4 is a sphere, and from a plurality of plane mirror PM 1, PM 2, PM 3..., PM nFolded light beam relative.The angle α of concave mirror 4 and vertical direction is relevant with the core diameter of optical fiber 3, and in order to guarantee to obtain higher coupling efficiency, when core diameter during more than or equal to 100 μ m, angle α is 1～5 degree.The end face of optical fiber 3 is positioned at the center of curvature O of concave mirror 4, and the reflecting surface of concave mirror 4 equals the radius of curvature R of concave mirror 4 to the distance L n of the end face of optical fiber 3 in other words.The radius of curvature R of the reflecting surface of concave mirror 4 depends on number of elements and spacing distance Dx, the Dy of a plurality of laser diode LDs, and when number of elements is 3～6, when Dx (Dy) was 4～8mm, radius of curvature R was between 40～60mm.For example, work as n=5, promptly adopt 5 laser diode LDs, horizontal range difference Dx between adjacent a plurality of laser diode LD and vertical range difference Dy are 6mm, when the core diameter of optical fiber 3 was 100 μ m, desirable concave mirror 4 reflector curvature radius Rs were 50mm, with the angle α of vertical direction be 3 degree.

Claims (4)

1、一种多束激光光纤耦合装置，其特征在于，该装置由多个光纤柱透镜(CL1、CL2、CL3、…、CLn)，多个平面反射镜(PM1、PM2、PM3、…、PMn)以及凹面反射镜(4)组成，多个光纤柱透镜(CL1、CL2、CL3、…、CLn)分别设置在多个单发射区激光二极管(LD1、LD2、LD3、…、LDn)的出光处，多个平面反射镜(PM1、PM2、PM3、…、PMn)分别设置在多个光纤柱透镜(CL1、CL2、CL3、…、CLn)上方，一字排列且均倾斜44～46度角，凹面反射镜(4)的反射面与来自多个平面反射镜(PM1、PM2、PM3、…、PMn)的反射光束相对，凹面反射镜(4)与垂直方向的夹角(α)为1～5度，光纤(3)的端面位于凹面反射镜(4)的曲率中心(O)。1. A multi-beam laser fiber coupling device, characterized in that the device consists of a plurality of fiber cylindrical lenses (CL 1 , CL 2 , CL 3 , ..., CL n ), a plurality of plane reflectors (PM 1 , PM 2 , PM 3 ,..., PM n ) and concave reflectors (4), a plurality of fiber cylindrical lenses (CL 1 , CL 2 , CL 3 ,..., CL n ) are respectively arranged on a plurality of single-emitting laser diodes (LD 1 , LD 2 , LD 3 ,..., LD n ), multiple planar reflectors (PM 1 , PM 2 , PM 3 ,..., PM n ) are respectively arranged on multiple fiber cylindrical lenses (CL 1 , CL 2 , CL 3 , ..., CL n ), arranged in a line and inclined at an angle of 44 to 46 degrees, the reflection surface of the concave reflector (4) and the reflection surface from a plurality of plane reflectors (PM 1 , PM 2 , PM 3 , ..., PM n ) are opposite to the reflected light beam, the angle (α) between the concave reflector (4) and the vertical direction is 1 to 5 degrees, and the end face of the optical fiber (3) is located at the center of curvature (O) of the concave reflector (4) . 2、根据权利要求1所述的耦合装置，其特征在于，多个光纤柱透镜(CL1、CL2、CL3、…、CLn)为数段数值孔径为0.22、芯径为200μm的光纤。2. The coupling device according to claim 1, characterized in that the plurality of fiber cylindrical lenses (CL 1 , CL 2 , CL 3 , . . . , CL n ) are several sections of optical fiber with a numerical aperture of 0.22 and a core diameter of 200 μm. 3、根据权利要求1所述的耦合装置，其特征在于，多个激光二极管(LD)的只数为3～6只，相邻多个激光二极管LD之间的水平距离差Dx与垂直距离差Dy相等且均为为4～8mm。3. The coupling device according to claim 1, characterized in that the number of multiple laser diodes (LD) is 3 to 6, and the horizontal distance difference Dx and the vertical distance difference between adjacent multiple laser diodes LD Dy is equal and both are 4-8 mm. 4、根据权利要求1所述的耦合装置，其特征在于，凹面反射镜(4)的反射面为球面，曲率半径(R)在40～60mm之间。4. The coupling device according to claim 1, characterized in that, the reflecting surface of the concave reflecting mirror (4) is a spherical surface, and the radius of curvature (R) is between 40-60 mm.
CNB2007100049287A 2007-02-12 2007-02-12 Multi-beam laser concave mirror fiber coupling device Expired - Fee Related CN100456070C (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106067657A (en) * 2016-07-12 2016-11-02 中国科学院半导体研究所 Bundle coupling device and coupled system are reversely closed in a kind of N × 1
CN106886086A (en) * 2008-10-27 2017-06-23 通快光子学公司 Laser beam interleaving
CN114384647A (en) * 2020-10-19 2022-04-22 青岛海信宽带多媒体技术有限公司 an optical module
CN114545565A (en) * 2020-11-24 2022-05-27 华为技术有限公司 Optical device
CN115016080A (en) * 2022-08-09 2022-09-06 武汉乾希科技有限公司 Optical transmission assembly and method for assembling the optical transmission assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902093A (en) * 1988-07-22 1990-02-20 Amp Incorporated Laser diode to fiber reflective coupling
US7254296B2 (en) * 2003-01-16 2007-08-07 Sae Magnetics (Hong Kong) Limited Apparatus for improved fiber optic coupling efficiency
KR20040102553A (en) * 2003-05-28 2004-12-08 삼성전자주식회사 Optical coupling lens system and fabrication mathod thereof
JP2005309370A (en) * 2003-10-27 2005-11-04 Nec Tokin Corp Optical module, optical multiplexer/demultiplexer, and optical multiplexing/demultiplexing unit using it

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106886086A (en) * 2008-10-27 2017-06-23 通快光子学公司 Laser beam interleaving
CN106886086B (en) * 2008-10-27 2021-06-04 通快光子学公司 Laser beam interleaving
CN106067657A (en) * 2016-07-12 2016-11-02 中国科学院半导体研究所 Bundle coupling device and coupled system are reversely closed in a kind of N × 1
CN114384647A (en) * 2020-10-19 2022-04-22 青岛海信宽带多媒体技术有限公司 an optical module
CN114545565A (en) * 2020-11-24 2022-05-27 华为技术有限公司 Optical device
WO2022110921A1 (en) * 2020-11-24 2022-06-02 华为技术有限公司 Optical device
CN115016080A (en) * 2022-08-09 2022-09-06 武汉乾希科技有限公司 Optical transmission assembly and method for assembling the optical transmission assembly

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