High-stability all-solid-state laser

Abstract

The invention discloses a high-stability all-solid-state laser which comprises an all-solid-state laser, a Lambada second wave sheet, a polarization spectrometer, a photoelectric detector, a proportion integration differentiation (PID) controller and a temperature controller, wherein a non-linear frequency doubling crystal is inserted into a resonant cavity of the all-solid-state laser, an output light beam of the all-solid-state laser sequentially passes through the Lambada second wave sheet and the polarization spectrometer, reflected light of the polarization spectrometer enters the photoelectric detector, the output end of the photoelectric detector is connected with the PID controller, the output end of the PID controller is connected with a temperature setting end of the temperature controller, the working temperature of the non-linear frequency doubling crystal in the all-solid-state laser is controlled by the temperature controller, and transmission light of the polarization spectrometer serves as system output light. In the high-stability all-solid-state laser, the non-linear loss in a laser cavity is changed by controlling the working temperature of the non-linear frequency doubling crystal, the power fluctuation of the laser is compensated, and high-stability laser output is obtained.

Description

technical field [0001] The invention relates to the technical field of all-solid-state lasers, in particular to a high-stability all-solid-state laser. Background technique [0002] All-solid-state lasers have been widely used in coherent communication, lidar, gravitational wave detection and scientific research. . In order to stabilize the output power of the laser, it can be achieved by improving the mechanical stability, controlling the pump power, or introducing losses inside or outside the cavity. At present, there are several methods for stabilizing laser power: [0003] 1. Improve the mechanical stability of the laser system through reasonable design, thereby improving the stability of the laser output power; [0004] 2. Use the photoelectric negative feedback method to control the driving current of the pump laser diode, control the pump power, and then stabilize the laser power; [0005] 3. Realized by controlling the power controller placed in the output beam b...

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Problems solved by technology

[0007] Among the above methods for stabilizing laser power, the method of improving the mechanical stability of the laser has certain limitations, and the laser power will still change with changes in the external environment; The method, which will affect the stability of the output light wavelength while stabilizing the laser power, is not suitable for situations with high requirements for laser power and frequency stability; the method of controlling the power controller placed in the output beam, the device The design is complex, the cost is high, and there is a certain loss to the output optical power. In addition, due to the low optical damage threshold of the electro-optic modulation crystal, it is not suitable for high-power laser systems

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