CN200944495Y - External cavity coherent phase-locking device of semiconductor laser for optical coupling - Google Patents
External cavity coherent phase-locking device of semiconductor laser for optical coupling Download PDFInfo
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- CN200944495Y CN200944495Y CN 200620119427 CN200620119427U CN200944495Y CN 200944495 Y CN200944495 Y CN 200944495Y CN 200620119427 CN200620119427 CN 200620119427 CN 200620119427 U CN200620119427 U CN 200620119427U CN 200944495 Y CN200944495 Y CN 200944495Y
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Abstract
The utility model relates to external cavity coherent phase-locking device of semiconductor laser for optical coupling, belonging to the technical field of laser multi-beam shaping, coupling and coherent light mode locking. In the device, a focusing collimating lens (2) is arranged in front of a semiconductor laser array (1); another side of the focusing collimating lens (2) is stuck with fibers corresponding to each luminescent unit of the semiconductor laser array (1); the stuck fiber forms a fiber array (3). Suppose the number of the luminescent units is N, the fiber array (3) is directly melted in a multimode fiber (5), and another end of the multimode fiber (5) is melted with N fibers through a multimode fiber beam splitter (6), then a fiber grating is melted as an external cavity mirror at the position in the same length with the N fibers. The device can effectively make high efficiency feedback to the laser output light, avoid the effect of the external factor on the laser external cavity, and reduce the optical loss during resonance and transmission.
Description
Technical field
The utility model relates to a kind of outer cavity coherent phase-locking device of using the semiconductor laser of optical fiber coupling, belongs to the shaping of laser multiple beam, coupling and coherent light mode locking technical field thereof.
Background technology
Isolate because each luminescence unit of high power semiconductor lasers is a photoelectricity, output radiation spatially be incoherent, optical field distribution is inhomogeneous, beam quality is poor.If the light that the laser that Several Parameters is identical sends is realized stack in a total resonant cavity,, the phase place process that automatically locks in resonant cavity, forms the coherent laser vibration thereby can taking place.The phase-locked coherent technique of exocoel realizes the technology of coherent laser vibration just, and it is to form new resonant cavity to lock the position phase of each laser cell outside semiconductor laser, thereby obtains the relevant output of nearly diffraction.This technology has improved the beam quality and the brightness of semiconductor laser.
Present exocoel Phase Lock Technique forms exocoel, the phase-locked effect of diffraction generation when utilizing light radiation to propagate by add optics external cavity mirror with certain reflectivity or phase conjugate lens etc. outside semiconductor laser in exocoel.Mainly contain initiatively phase control act, spatial filtering method and Talbot exocoel method.Wherein, initiatively phase control act by the exterior light electro-detection, control the position phase of each laser cell, make to reach the phase place unanimity between each unit, obtain coupling and export, improve beam quality.But need phase-locked semiconductor laser unit very many in high power laser output, be difficult to quick, the accurate and complicated phase place observing and controlling of realization each unit.Spatial filtering method has adopted complicated filtering optical element, need carry out meticulous design and adjust could realizing, and the filtration afterwards loss ratio of laser in exocoel is bigger.Talbot exocoel method will realize the relevant phase-locked of output light from methods such as imagings after utilizing the luminescence unit of periodic arrangement to pass through the Talbot distance, these methods all are to form the space resonator, utilize optical lens components, this structural mechanism is complicated and unstable, promptly increased loss, exist again and regulate difficulty, cost is crossed problems such as height, is difficult to realize the relevant phase-locked of exocoel.
The utility model content
The complex structure, the loss that exist in employing active phase control act, spatial filtering method and the Talbot exocoel method in the background technology are big, adjusting is inconvenient, cost is crossed problems such as height in order to solve, the utility model provides a kind of outer cavity coherent phase-locking device of using the semiconductor laser of optical fiber coupling, and this device can obtain the relevant phase-locked laser output of semiconductor of narrow linewidth, high-peak power.
To achieve these goals, the utility model has been taked following technical scheme.This device mainly includes semiconductor laser array 1, focussed collimated lens 2, multimode fiber 5, wherein, front at semiconductor laser array 1 luminescence unit is provided with focussed collimated lens 2, the another side of condenser lens collimating lens 2, and the position of each luminescence unit of corresponding semiconductor laser array 1 be pasted with optical fiber respectively, the optical fiber of being pasted is formed fiber array 3, the number of supposing the luminescence unit of semiconductor laser array is N, and promptly the fiber count in the fiber array 3 is N; Fiber array 3 directly is fused in the root multimode fiber 5, at the other end of multimode fiber 5 by multimode fiber beam splitter 6 N root optical fiber in the welding again, position welding in the equal length of this N root optical fiber has the Bragg fiber grating, perhaps will be wherein N-1 root optical fiber directly be fused on the multi-mode optica lfiber grating 28, in the welding of another root master output with the fiber grating S29 of multi-mode optica lfiber grating 28 same diameter and core diameter.
Bragg fiber grating in the position welding of described equal length at N root optical fiber or the preparation, the reflectivity that wherein has only one road antiradar reflectivity fiber grating 25 is between 4～10%, and the reflectivity of other each road fiber grating is between 80～99.9%.
The reflectivity of described multi-mode optica lfiber grating 28 is between 80～99.9%, and the reflectivity of fiber grating S29 is between 4～10%.
Outer cavity coherent phase-locking device of the present utility model, utilize optical fiber by luminescence unit man-to-man be coupled of focussed collimated lens 2 with semiconductor laser 1, realize that each luminescence unit one dimension is reset to the transformation of two dimension in the high-power semiconductor laser, and then the fiber bundle formed of the multifiber after will being coupled directly closes and restraints in the large-diameter fibre-optical, the other end at this root large-diameter fibre-optical adopts multifiber to close bundle output equally, Bragg fiber grating in the position welding of the equal length of output or preparation, wherein the reflectivity of one tunnel fiber grating is lower, remain between 4～10%, the reflectivity of the fiber grating of other multichannels is higher in addition, remains in 80～99.9% the scope.By the feedback of fiber grating, realized that two-dimentional relevant coupling improves the purpose of beam quality.In this course, increased the numerical value of exocoel phase-locked pairing " luminescence unit " fill factor, curve factor.The number of adjacent " luminescence unit " is increased to 4 or 6 by 2 simultaneously, and this helps improving the phase-locked relevant coupling efficiency of exocoel.The fiber grating that wherein has only antiradar reflectivity in the output optical fibre welding is as output channel.Optical-fiber bundling device adopts polarization maintaining optical fibre, the battle array property unanimity partially of really going bail for.The outer cavity coherent of having formed the semiconductor laser of an all optical fibre structure like this closes the Shu Suoxiang reaction cavity, semiconductor laser radiation light resonance in optical fiber, by fiber grating reflected back semiconductor laser active area, it is phase-locked to realize being concerned with between the adjacent luminescence unit of active area, by one road optical fiber output narrow linewidth of antiradar reflectivity fiber grating, the relevant phase-locked laser of semiconductor of high-peak power.
Adopt speculum and the full optical-fiber bundling device of fiber grating, can effectively carry out high efficiency feedback like this, can avoid the influence of environmental factors again, reduced the optical loss in resonance and the transmission laser external cavity to laser output light as exocoel; Need not to add optical element, its compact conformation is simple, has realized full fiberize structure, and cost reduces.
Description of drawings
Fig. 1 is the open all-fiber coherent Coupled Feedback of a utility model chamber schematic diagram
Fig. 2 is the closed all-fiber coherent Coupled Feedback of a utility model chamber schematic diagram
Among the figure: 1, semiconductor laser array, 2, the focussed collimated lens, 3, fiber array, 4, the multimode fiber bundling device, 5 multimode fibers, 6 multimode fiber beam splitters, 7, fiber grating A, 8, fiber grating B, 9, fiber grating C, 10, fiber grating D, 11, fiber grating E, 12, fiber grating F, 13, fiber grating G, 14, fiber grating H, 15, fiber grating I, 16, fiber grating G, 17, fiber grating K, 18, fiber grating L, 19, fiber grating M, 20, fiber grating N, 21, fiber grating O, 22, fiber grating P, 23, fiber grating Q, 24, fiber grating R, 25, the antiradar reflectivity fiber grating, 26, the semiconductor laser linear array shape, 27, fiber bundle, 28, the multimembrane fiber grating, 29, fiber grating S.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified, but the utility model is not limited to these embodiment.
Embodiment 1: Figure 1 shows that first embodiment of the present utility model.Choose a semiconductor laser linear array 1, wherein luminescence unit is chosen for 19, approximately the 0.5mm place is equipped with focussed collimated lens 2 before the light-emitting area of semiconductor laser 1, be close to the parallel one to one corresponding luminescence unit of focussed collimated lens output face at the another side of focussed collimated lens 2 and be bonded with 19 optical fiber, form fiber array 3, the other end of pasting the fiber array 3 of 19 optical fiber compositions after being coupled is bundled into fiber bundle, this fiber bundle directly is fused in the major diameter multimembrane optical fiber 5, the other end at this root major diameter multimembrane optical fiber 5 adopts 1 * (18+1) multimembrane fiber optic splitter 6 in the welding equally, wherein 18 outputs are secondary output, and 1 is main output.Fiber grating A7 in welding on 18 secondary outputs on (18+1) of this multimembrane fiber optic splitter 6 root output, fiber grating B8, fiber grating C9, fiber grating D10, fiber grating E11, fiber grating F12, fiber grating G13, fiber grating H14, fiber grating I15, fiber grating G16, fiber grating K17, fiber grating L18, fiber grating M19, fiber grating N20, fiber grating O21, fiber grating P22, fiber grating Q23, fiber grating R24, these fiber gratings are the multimembrane fiber grating, its reflectivity all is 95%, and its realization will give reflected back secondary output optical fibre with 95% efficient by the light that these 18 Optical Fiber Transmission are come.The antiradar reflectivity fiber grating 25 of same diameter and core diameter in the welding of another root master output, this antiradar reflectivity fiber grating 25 is a multi-mode optica lfiber grating, its reflection efficiency is 8%, realizes that like this light by this root master output optical fibre has 8% amount to be reflected back toward in the main output optical fibre.
Embodiment 2: Figure 2 shows that second embodiment of the present utility model.Choose a semiconductor laser linear array 1, wherein luminescence unit is chosen for 19, approximately the 0.5mm place is equipped with focussed collimated lens 2 before the light-emitting area of semiconductor laser 1, be close to the parallel one to one corresponding luminescence unit of focussed collimated lens output face at the another side of focussed collimated lens 2 and be bonded with 19 optical fiber, form fiber array 3, and then the other end that will paste the fiber array 3 of 19 optical fiber compositions after the coupling is bundled into fiber bundle, this fiber bundle directly is fused in the major diameter multimembrane optical fiber 5, the other end at this root major diameter multimembrane optical fiber 5 adopts 1 * (18+1) multimembrane fiber optic splitter 6 in the welding equally, wherein 18 outputs are secondary output, and 1 is main output.
18 secondary outputs are bundled into fiber bundle 27, this fiber bundle directly is fused on the major diameter multimembrane fiber grating 28, the reflectivity of this root major diameter multimembrane fiber grating 28 is 95%, and its realization will be given in 18 secondary output optical fibres of reflected back with 95% efficient by this root major diameter multimembrane fiber grating 28 by the light that these 18 secondary output optical fibre transmission come.The fiber grating S29 of same diameter and core diameter in the welding of another root master output, this fiber grating S29 is a multi-mode optica lfiber grating, its reflection efficiency is 8%, realizes that like this light by this root master output optical fibre has 8% amount to be reflected back toward in the main output optical fibre.
Claims (6)
1, a kind of outer cavity coherent phase-locking device of using the semiconductor laser of optical fiber coupling, it is characterized in that: this device mainly includes semiconductor laser array (1), focussed collimated lens (2), multimode fiber (5), wherein, front at semiconductor laser array (1) luminescence unit is provided with focussed collimated lens (2), another side in condenser lens collimating lens (2), and the position of each luminescence unit of corresponding semiconductor laser array (1) is pasted with optical fiber respectively, the optical fiber of being pasted is formed fiber array (3), the number of supposing the luminescence unit of semiconductor laser array is N, and promptly the fiber count in the fiber array (3) is N; Fiber array (3) directly is fused in the root multimode fiber (5), at the other end of multimode fiber (5) by multimode fiber beam splitter (6) N root optical fiber in the welding again, position welding in the equal length of this N root optical fiber has the Bragg fiber grating, perhaps will be wherein N-1 root optical fiber directly be fused on the multi-mode optica lfiber grating (28), in the welding of another root master output with the fiber grating S (29) of same diameter of multi-mode optica lfiber grating (28) and core diameter.
2, a kind of outer cavity coherent phase-locking device of using the semiconductor laser of optical fiber coupling according to claim 1, it is characterized in that: Bragg fiber grating in the position welding of described equal length at N root optical fiber or the preparation, the reflectivity that wherein has only one road antiradar reflectivity fiber grating (25) is between 4～10%, and the reflectivity of the fiber grating on other each road is between 80～99.9%.
3, a kind of outer cavity coherent phase-locking device of using the semiconductor laser of optical fiber coupling according to claim 1, it is characterized in that: the reflectivity of described multi-mode optica lfiber grating (28) is between 80～99.9%, and the reflectivity of fiber grating S (29) is between 4～10%.
4, a kind of outer cavity coherent phase-locking device of using the semiconductor laser of optical fiber coupling according to claim 4, it is characterized in that: the distance between semiconductor laser array (1) and the focussed collimated lens (2) is 0.1～10mm.
5, a kind of outer cavity coherent phase-locking device of using the semiconductor laser of optical fiber coupling according to claim 4, it is characterized in that: multimode fiber beam splitter (6) is a polarization maintaining optical fibre.
6, a kind of outer cavity coherent phase-locking device of using the semiconductor laser of optical fiber coupling according to claim 4, it is characterized in that: described semiconductor laser array (1) is linear array shape or folded shape array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620119427 CN200944495Y (en) | 2006-09-08 | 2006-09-08 | External cavity coherent phase-locking device of semiconductor laser for optical coupling |
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| CN 200620119427 CN200944495Y (en) | 2006-09-08 | 2006-09-08 | External cavity coherent phase-locking device of semiconductor laser for optical coupling |
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| CN200944495Y true CN200944495Y (en) | 2007-09-05 |
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| CN 200620119427 Expired - Fee Related CN200944495Y (en) | 2006-09-08 | 2006-09-08 | External cavity coherent phase-locking device of semiconductor laser for optical coupling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879909A (en) * | 2012-09-25 | 2013-01-16 | 长春德信光电技术有限公司 | Spectral beam combining device with one optical grating shared by multiple beams and method thereof |
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2006
- 2006-09-08 CN CN 200620119427 patent/CN200944495Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879909A (en) * | 2012-09-25 | 2013-01-16 | 长春德信光电技术有限公司 | Spectral beam combining device with one optical grating shared by multiple beams and method thereof |
| CN102879909B (en) * | 2012-09-25 | 2015-08-05 | 长春德信光电技术有限公司 | Multiple beam shares the method that a grating carries out spectrum beam combination |
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| CF01 | Termination of patent right due to non-payment of annual fee |