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Large-energy high-power SBS beam-combining method and beam-combining laser
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A high-power, high-energy technology, applied in the optical field, can solve the problems of poor anti-interference ability of Stokes light, and achieve the effect of improving anti-interference ability, easy production and maintenance, and energy improvement space
Inactive Publication Date: 2015-09-02
吕志伟
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem of poor anti-interference ability of the Stokes light obtained by simply using the main oscillation power a
Method used
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specific Embodiment approach 1
[0020] Specific implementation manner 1: The high-energy and high-power SBS grouping method described in this embodiment includes the following steps:
[0021] Step 1: Divide the single longitudinal mode seed light into two beams, one beam is used to generate first-order Stokes light, and the other beam is used as the pump light seed;
[0022] Step 2: Divide the first-order Stokes light and pumped light seeds into m groups and inject them into m amplification modules, where m is an integer greater than 1.
[0023] Step 3: In each amplification module, amplify the pump light, and use the amplified pump light to amplify the first-order Stokes light to obtain the amplified first-order Stokes light;
[0024] Step 4. Select one group from m groups of amplified first-order Stokes light to generate second-order Stokes light, use the remaining m-1 groups of amplified first-order Stokes light as pumping light, and perform processing on the second-order Stokes light Amplify to obtain the amplif...
specific Embodiment approach 2
[0026] Specific embodiment 2: This embodiment further defines the high-energy and high-power SBS beam combining method described in Embodiment 1. In step 3, the method for amplifying the pumping light is: dividing the pumping light into n beams, The n beams of pumping light are respectively amplified, and n is an integer greater than one.
specific Embodiment approach 3
[0027] Specific embodiment three: this embodiment is a further limitation to the high-energy and high-power SBS beam combining method described in the first embodiment. The method of second-order Stokes optical amplification in step four is: the serial beam combining method is used, and the second Step by step Stokes zoom.
[0028] Inject m-1 groups of amplified first-order Stokes light into m-1 serial SBS amplification cells, and make the second-order Stokes pass through m-1 SBS amplification cells in turn, and finally obtain the amplified second-order Stokes light .
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Abstract
The invention discloses a large-energy high-power SBS beam-combining method and a beam-combining laser, and relates to the technology of serial beam combination of laser. The invention solves a problem that the anti-interference capability of Stokes light obtained through main oscillation power amplification in a serial beam-combining laser with superlarge energy output is poor. The method comprises the steps: dividing single longitudinal-mode sub light into two beams, wherein one beam is used for generating first-order Stokes light and the other beam serves as a pumping light seed; respectively dividing the first-order Stokes light and pumping light into m groups which are injected into m amplification modules; amplifying the pumping light through the amplification modules, and employing the amplified pumping light to amplify the first-order Stokes light; employing the amplified first-order Stokes light to generate second-order Stokes light, enabling the residual first-order Stokes light to serve as pumping light for amplifying the second-order Stokes light, and obtaining beam-combining laser. The method is high in interference resistance, and is suitable for large-energy high-power solid beam-combining lasers.
Description
Technical field [0001] The invention relates to laser serial beam grouping technology and belongs to the optical field. Background technique [0002] In high-energy solid-state lasers, as the laser repetition frequency and energy increase, a large amount of waste heat cannot be avoided in the laser crystal. Especially in order to further increase the laser output energy and increase the crystal size, it will cause greater difficulty in the increase of the repetition frequency and the heat dissipation of the medium, resulting in a series of problems such as the degradation of the beam quality and the damage of the medium. So far, in the field of solid-state lasers, the energy, repetition frequency, and beam quality that can be obtained by the step-by-step amplification technology of a single laser beam are still greatly restricted. At present, the laser beam grouping technology, which combines several low-power and low-energy lasers to obtain high-energy and high-power laser outp...
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