Collinear output multi-resonant cavity solid laser

Abstract

The utility model relates to a collinear output multi-resonant cavity solid laser, which comprises two groups of laser cavity mirrors, a laser gain medium and a pumping source, the system further comprises a laser output cavity mirror. Each group of laser cavity mirror, the laser gain medium, the pumping source and the laser output cavity mirror form a resonant cavity; an acousto-optic modulator is arranged between the pumping source and the laser output cavity mirror; the two groups of laser cavity mirrors, the laser gain medium and the pumping source are correspondingly provided with an acousto-optic modulator, laser emitted by one group is set to be conducted along the 0-level light direction of the acousto-optic modulator, and laser emitted by the other group is set to be conducted along the 1-level light direction of the acousto-optic modulator. According to the utility model, the multiple resonant cavities are output through one laser output cavity mirror through the acousto-optic modulator, so that the collinear output of the multiple resonant cavities is realized, and the operation of firstly carrying out frequency doubling and then carrying out beam combination on the frequency-doubled light by virtue of elements such as a dichroscope is not needed. The laser structure is simplified, and the stability of the laser is improved.

Description

Technical Field

[0001] The utility model relates to a co-linear output multi-resonance cavity solid laser, belonging to the technical field of solid lasers. Background Art

[0002] With the development of laser technology and applications, multi-resonant cavity lasers have become one of the hot topics in the research field. Multi-resonant cavity lasers are often used to generate high repetition rate pulse sequences, high average power pulse lasers, multi-wavelength lasers, etc. Their application areas include high-speed photography, holography, ultrafast physical process research, absolute distance measurement, etc.

[0003] Multi-resonance cavity lasers are mainly fiber-optic and solid-state types.

[0004] Fiber-based multi-resonant cavity lasers use fiber devices such as beam combiners, beam splitters, circulators, and Bragg gratings as the core to construct multi-resonant cavities. For example, the patent with application number 202111132248.X discloses a multi-cavity composite pulse laser and a multi-cavity composite pulse laser amplifier.

[0005] Solid-state multi-resonant cavity lasers have more diverse configurations and different functions. For example, in a multi-cavity solution with independent and parallel resonant cavities, the output laser is not collinear. The patent with publication number CN86209627U discloses a multi-cavity sequential pulse laser, which uses polarization devices to form multi-resonant cavities, and some devices are shared in the resonant cavity. The output laser is collinear, and usually only dual-frequency output can be achieved.

[0006] The prior art has the following problems:

[0007] Fiber-based multi-resonant cavity lasers are limited by the thin core diameter of the optical fiber and the low damage threshold, making it difficult to output high-power lasers.

[0008] For solid-state multi-resonance cavity lasers with the same or close fundamental wavelengths and fundamental frequency laser outputs, the output lasers cannot be co-linear;

[0009] For fundamental frequency wavelengths that are the same or close, and the output laser is a fundamental frequency laser, to obtain co-linear output, according to the literature studied, only dual-frequency dual-cavity can be achieved;

[0010] To achieve multi-cavity co-frequency and co-linear laser output, frequency conversion must be performed first, such as frequency doubling, and then the frequency-doubled light is combined with the help of components such as dichroic mirrors, such as the patent application number 200810017594.1. Utility Model Content

[0011] In order to overcome the above problems, the utility model provides a co-linear output multi-resonant cavity solid-state laser, which uses an acousto-optic modulator to allow the multi-resonant cavity to output through a laser output cavity mirror. While realizing the co-linear output of the multi-resonant cavity, it is no longer necessary to first double the frequency and then combine the doubled frequency light with the help of components such as dichroic mirrors. The laser structure is simplified and the stability of the laser is improved.

[0012] The technical solution of the utility model is as follows:

[0013] First aspect

[0014] A co-linear output multi-resonance cavity solid laser comprises two groups of laser cavity mirrors, a laser gain medium and a pump source;

[0015] Also included is a laser output cavity mirror;

[0016] Each group of the laser cavity mirror, the laser gain medium, the pump source and the laser output cavity mirror constitutes a resonant cavity;

[0017] An acousto-optic modulator is arranged between the pump source and the laser output cavity mirror;

[0018] Two groups of the laser cavity mirrors, the laser gain medium, and the pump source are correspondingly provided with an acousto-optic modulator, wherein the laser emitted by one group is arranged to be conducted along the 0th order light direction of the acousto-optic modulator, and the laser emitted by the other group is arranged to be conducted along the 1st order light direction of the acousto-optic modulator.

[0019] Furthermore, the laser wavelength output by the resonant cavity formed by the two groups of the laser cavity mirrors, the laser gain medium, the pump source and the laser output cavity mirror is the same.

[0020] Furthermore, the laser wavelengths output by the resonant cavity formed by the two groups of the laser cavity mirrors, the laser gain medium, the pump source and the laser output cavity mirror are different.

[0021] Second aspect

[0022] A co-linear output multi-resonance cavity solid laser, comprising 4 groups of laser cavity mirrors, a laser gain medium and a pump source;

[0023] Also included is a laser output cavity mirror;

[0024] Each group of the laser cavity mirror, the laser gain medium, the pump source and the laser output cavity mirror constitutes a resonant cavity;

[0025] An acousto-optic modulator is arranged between the pump source and the laser output cavity mirror;

[0026] Each two groups of the laser cavity mirror, the laser gain medium, and the pump source are provided with one acousto-optic modulator, wherein the laser emitted by one group is set to be conducted along the 0th order light direction of the acousto-optic modulator, and the laser emitted by the other group is set to be conducted along the 1st order light direction of the acousto-optic modulator;

[0027] A secondary acousto-optic modulator is arranged between the acousto-optic modulator and the laser output cavity mirror;

[0028] A secondary AOM is correspondingly arranged for each of the two AOMs, wherein the laser emitted by one of the AOMs is arranged to be conducted along the 0th order light direction of the secondary AOM, and the other is arranged to be conducted along the 1st order light direction of the secondary AOM.

[0029] Furthermore, the laser wavelengths output by the resonant cavity formed by the four groups of laser cavity mirrors, the laser gain medium, the pump source and the laser output cavity mirrors are all the same.

[0030] Furthermore, the laser wavelengths output by the resonant cavity formed by the four groups of laser cavity mirrors, the laser gain medium, the pump source and the laser output cavity mirrors are all different.

[0031] The third aspect

[0032] A co-linear output multi-resonance cavity solid laser, comprising three groups of laser cavity mirrors, a laser gain medium and a pump source;

[0033] Also included is a laser output cavity mirror;

[0034] Each group of the laser cavity mirror, the laser gain medium, the pump source and the laser output cavity mirror constitutes a resonant cavity;

[0035] An acousto-optic modulator is arranged between the pump source and the laser output cavity mirror;

[0036] Two groups of the laser cavity mirrors, the laser gain medium, and the pump source are correspondingly provided with an acousto-optic modulator, wherein the laser emitted by one group is set to be conducted along the 0th order light direction of the acousto-optic modulator, and the laser emitted by the other group is set to be conducted along the 1st order light direction of the acousto-optic modulator;

[0037] A secondary acousto-optic modulator is arranged between the acousto-optic modulator and the laser output cavity mirror;

[0038] The acousto-optic modulator and a group of the laser cavity mirror, the laser gain medium, and the pump source without the acousto-optic modulator are correspondingly provided with a secondary acousto-optic modulator, wherein the laser emitted by the acousto-optic modulator is arranged to be conducted along the 0th order light direction of the secondary acousto-optic modulator, and the group of the laser cavity mirror, the laser gain medium, and the pump source without the acousto-optic modulator are arranged to be conducted along the 1st order light direction of the secondary acousto-optic modulator.

[0039] Furthermore, the laser wavelengths output by the resonant cavity formed by the three groups of laser cavity mirrors, the laser gain medium, the pump source and the laser output cavity mirrors are all the same.

[0040] Furthermore, the laser wavelengths output by the resonant cavity formed by the three groups of the laser cavity mirrors, the laser gain medium, the pump source and the laser output cavity mirrors are all different.

[0041] The utility model has the following beneficial effects:

[0042] The laser disclosed in the utility model can make 2-4 resonant cavities output in a co-linear manner, and each resonant cavity is independently arranged to output the same or different laser gain media. While realizing the co-linear output of multiple resonant cavities, it is no longer necessary to first double the frequency and then combine the doubled frequency light with the help of components such as dichroic mirrors. The laser structure is simplified and the stability of the laser is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0044] Figure 2 It is a cross-sectional view of the utility model.

[0045] The reference numerals in the figure represent:

[0046] 1. Laser cavity mirror; 2. Laser gain medium; 3. Pump source; 4. Acousto-optic modulator; 5. Laser output cavity mirror; 6. Secondary acousto-optic modulator. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] First aspect

[0049] refer to Figure 1 , a co-linear output multi-resonant cavity solid laser, comprising two groups of laser cavity mirrors 1, a laser gain medium 2 and a pump source 3;

[0050] Also includes a laser output cavity mirror 5;

[0051] Each group of the laser cavity mirror 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 constitutes a resonant cavity;

[0052] An acousto-optic modulator 4 is provided between the pump source 3 and the laser output cavity mirror 5;

[0053] Two groups of the laser cavity mirrors 1, the laser gain medium 2, and the pump source 3 are correspondingly provided with an acousto-optic modulator 4, wherein the laser emitted by one group is set to be conducted along the 0th order light direction of the acousto-optic modulator 4, and the laser emitted by the other group is set to be conducted along the 1st order light direction of the acousto-optic modulator 4.

[0054] When the RF signal is not loaded on the AOM 4, the 0th order light direction of the AOM 4 is turned on. When the RF signal is loaded on the AOM 4, the 1st order light direction of the AOM 4 is turned on, and the laser is output through the laser output cavity mirror.

[0055] In one embodiment of the present utility model, the laser wavelength output by the resonant cavity formed by the two groups of the laser cavity mirrors 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 is the same.

[0056] In one embodiment of the present invention, the wavelengths of lasers output by the resonant cavity formed by two groups of the laser cavity mirrors 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 are different.

[0057] Second aspect

[0058] refer to Figure 2 , a co-linear output multi-resonance cavity solid laser, comprising 4 groups of laser cavity mirrors 1, a laser gain medium 2 and a pump source 3;

[0059] Also includes a laser output cavity mirror 5;

[0060] Each group of the laser cavity mirror 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 constitutes a resonant cavity;

[0061] An acousto-optic modulator 4 is provided between the pump source 3 and the laser output cavity mirror 5;

[0062] Each two groups of the laser cavity mirror 1, the laser gain medium 2, and the pump source 3 are provided with one acousto-optic modulator 4, wherein the laser emitted by one group is set to be conducted along the 0th order light direction of the acousto-optic modulator 4, and the laser emitted by the other group is set to be conducted along the 1st order light direction of the acousto-optic modulator 4;

[0063] When the RF signal is not loaded on the AOM 4, the 0th order light direction of the AOM 4 is turned on. When the RF signal is loaded on the AOM 4, the 1st order light direction of the AOM 4 is turned on, and the laser is output through the laser output cavity mirror.

[0064] A secondary acousto-optic modulator 6 is arranged between the acousto-optic modulator 4 and the laser output cavity mirror 5.

[0065] One secondary AOM 6 is correspondingly arranged for each of the two AOMs 4, wherein the laser emitted by one of the AOMs 4 is arranged to be conducted along the 0th order light direction of the secondary AOM 6, and the other is arranged to be conducted along the 1st order light direction of the secondary AOM 6.

[0066] When the secondary AOM 6 is not loaded with a radio frequency signal, the 0th order light direction of the secondary AOM 6 is turned on; when the secondary AOM 6 is loaded with a radio frequency signal, the 1st order light direction of the secondary AOM 6 is turned on, and the laser is output through the laser output cavity mirror.

[0067] In one embodiment of the present invention, the laser wavelengths output by the resonant cavity formed by the four groups of the laser cavity mirrors 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 are all the same.

[0068] In one embodiment of the present invention, the laser wavelengths output by the resonant cavity formed by the four groups of the laser cavity mirrors 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 are all different.

[0069] The third aspect

[0070] A co-linear output multi-resonance cavity solid laser comprises three groups of laser cavity mirrors 1, a laser gain medium 2 and a pump source 3;

[0071] Also includes a laser output cavity mirror 5;

[0072] Each group of the laser cavity mirror 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 constitutes a resonant cavity;

[0073] An acousto-optic modulator 4 is provided between the pump source 3 and the laser output cavity mirror 5;

[0074] Two groups of the laser cavity mirrors 1, the laser gain medium 2, and the pump source 3 are correspondingly provided with an acousto-optic modulator 4, wherein the laser emitted by one group is set to be conducted along the 0th order light direction of the acousto-optic modulator 4, and the laser emitted by the other group is set to be conducted along the 1st order light direction of the acousto-optic modulator 4;

[0075] When the RF signal is not loaded on the AOM 4, the 0th order light direction of the AOM 4 is turned on. When the RF signal is loaded on the AOM 4, the 1st order light direction of the AOM 4 is turned on, and the laser is output through the laser output cavity mirror.

[0076] A secondary acousto-optic modulator 6 is arranged between the acousto-optic modulator 4 and the laser output cavity mirror 5.

[0077] The acousto-optic modulator 4 and a group of the laser cavity mirror 1, the laser gain medium 2, and the pump source 3 without the acousto-optic modulator 4 are correspondingly provided with a secondary acousto-optic modulator 6, wherein the laser emitted by the acousto-optic modulator 4 is configured to be conducted along the 0th order light direction of the secondary acousto-optic modulator 6, and the group of the laser cavity mirror 1, the laser gain medium 2, and the pump source 3 without the acousto-optic modulator 4 are configured to be conducted along the 1st order light direction of the secondary acousto-optic modulator 6.

[0078] When the secondary AOM 6 is not loaded with a radio frequency signal, the 0th order light direction of the secondary AOM 6 is turned on; when the secondary AOM 6 is loaded with a radio frequency signal, the 1st order light direction of the secondary AOM 6 is turned on, and the laser is output through the laser output cavity mirror.

[0079] In one embodiment of the present utility model, the laser wavelengths output by the resonant cavity formed by the three groups of the laser cavity mirrors 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 are all the same.

[0080] In one embodiment of the present invention, the wavelengths of lasers output by the resonant cavity formed by the three groups of the laser cavity mirrors 1, the laser gain medium 2, the pump source 3 and the laser output cavity mirror 5 are all different.

[0081] The working principle of the utility model is as follows:

[0082] When the utility model is in use, by loading or not loading the radio frequency signal on the acousto-optic modulator 4 or the secondary acousto-optic modulator 6, selection of different resonant cavities is realized, and finally the co-linear output of multiple resonant cavities is realized.

[0083] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure made using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A co-linear output multi-resonance cavity solid-state laser, characterized in that: It comprises two groups of laser cavity mirrors (1), a laser gain medium (2) and a pump source (3); It also includes a laser output cavity mirror (5); Each group of the laser cavity mirror (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) constitutes a resonant cavity; An acousto-optic modulator (4) is arranged between the pump source (3) and the laser output cavity mirror (5); Two groups of the laser cavity mirrors (1), the laser gain medium (2), and the pump source (3) are provided with a corresponding acousto-optic modulator (4), wherein the laser light emitted by one group is arranged to be conducted along the 0th order light direction of the acousto-optic modulator (4), and the laser light emitted by the other group is arranged to be conducted along the 1st order light direction of the acousto-optic modulator (4).

2. The co-linear output multi-resonance cavity solid-state laser according to claim 1, characterized in that: The laser wavelength output by the resonant cavity formed by the two groups of laser cavity mirrors (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) is the same.

3. The co-linear output multi-resonance cavity solid-state laser according to claim 1, characterized in that: The laser wavelengths output by the resonant cavity formed by the two groups of laser cavity mirrors (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) are different.

4. A co-linear output multi-resonance cavity solid-state laser, characterized in that: It includes four groups of laser cavity mirrors (1), a laser gain medium (2) and a pump source (3); It also includes a laser output cavity mirror (5); Each group of the laser cavity mirror (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) constitutes a resonant cavity; An acousto-optic modulator (4) is arranged between the pump source (3) and the laser output cavity mirror (5); Each two groups of the laser cavity mirror (1), the laser gain medium (2), and the pump source (3) are provided with a corresponding acousto-optic modulator (4), wherein the laser light emitted by one group is arranged to be conducted along the 0th order light direction of the acousto-optic modulator (4), and the laser light emitted by the other group is arranged to be conducted along the 1st order light direction of the acousto-optic modulator (4); A secondary acousto-optic modulator (6) is arranged between the acousto-optic modulator (4) and the laser output cavity mirror (5). A corresponding secondary acousto-optic modulator (6) is provided for each of the two acousto-optic modulators (4), wherein the laser light emitted by one of the acousto-optic modulators (4) is arranged to be conducted along the 0th order light direction of the secondary acousto-optic modulator (6), and the laser light emitted by the other acousto-optic modulator (4) is arranged to be conducted along the 1st order light direction of the secondary acousto-optic modulator (6).

5. The co-linear output multi-resonance cavity solid-state laser according to claim 4, characterized in that: The laser wavelengths output by the resonant cavity formed by the four groups of laser cavity mirrors (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) are all the same.

6. The co-linear output multi-resonance cavity solid-state laser according to claim 4, characterized in that: The laser wavelengths output by the resonant cavity formed by the four groups of laser cavity mirrors (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) are all different.

7. A co-linear output multi-resonance cavity solid-state laser, characterized in that: It includes three groups of laser cavity mirrors (1), a laser gain medium (2) and a pump source (3); It also includes a laser output cavity mirror (5); Each group of the laser cavity mirror (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) constitutes a resonant cavity; An acousto-optic modulator (4) is arranged between the pump source (3) and the laser output cavity mirror (5); Two groups of the laser cavity mirrors (1), the laser gain medium (2), and the pump source (3) are provided with a corresponding acousto-optic modulator (4), wherein the laser light emitted by one group is arranged to be conducted along the 0th order light direction of the acousto-optic modulator (4), and the laser light emitted by the other group is arranged to be conducted along the 1st order light direction of the acousto-optic modulator (4); A secondary acousto-optic modulator (6) is arranged between the acousto-optic modulator (4) and the laser output cavity mirror (5). The acousto-optic modulator (4) and a group of the laser cavity mirror (1), the laser gain medium (2), and the pump source (3) without the acousto-optic modulator (4) are provided with a corresponding one of the two-stage acousto-optic modulator (6), wherein the laser light emitted by the acousto-optic modulator (4) is arranged to be conducted along the 0th order light direction of the two-stage acousto-optic modulator (6), and the group of the laser cavity mirror (1), the laser gain medium (2), and the pump source (3) without the acousto-optic modulator (4) are arranged to be conducted along the 1st order light direction of the two-stage acousto-optic modulator (6).

8. The co-linear output multi-resonance cavity solid-state laser according to claim 7, characterized in that: The laser wavelengths output by the resonant cavity formed by the three groups of laser cavity mirrors (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) are all the same.

9. The co-linear output multi-resonance cavity solid-state laser according to claim 7, characterized in that: The laser wavelengths output by the resonant cavity formed by the three groups of laser cavity mirrors (1), the laser gain medium (2), the pump source (3) and the laser output cavity mirror (5) are all different.

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