A short pulse laser system and control method based on burst mode

Abstract

The embodiment of the present invention provides a Burst mode-based short-pulse laser system and control method, including an external control circuit, an optical oscillator module, a mode matcher, and an optical amplifier module, wherein: the external control circuit is used to generate a trigger signal, and Send the trigger signal to the optical oscillation level module for controlling the optical oscillation level module; wherein, the trigger signal is a pulse electrical signal, including a pump trigger signal and a Q-switching trigger signal; the optical oscillation level module is used to The trigger signal generates a narrow pulse laser; the mode matcher is used to adjust the size of the narrow pulse laser, and sends the narrow pulse laser after size adjustment to the optical amplifier module; the optical amplifier module is used to adjust the size The adjusted narrow pulse laser is amplified to generate short pulse laser based on Burst mode. The embodiments of the present invention can maintain stable output of short-pulse laser strings under a wide range of working repetition frequencies, and the pulse width is approximately stable.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a Burst mode-based short-pulse laser system and a control method. Background technique [0002] Among existing lasers, high-gain Q-switched solid-state subnanosecond lasers have the advantages of high output peak power and good stability, and are widely used in fine processing, biomedicine, and spectral analysis. However, due to the high heat generation of the high-gain solid-state Q-switched laser, the thermal effect in the gain region is serious, which limits its further application. [0003] In order to improve the thermal performance of the laser, most high-gain solid-state Q-switched lasers adopt low repetition frequency pulse pumping, or limit the pump power density in the gain region, which limits the application of high repetition frequency of short pulses. Moreover, when adjusting the repetition frequency of the laser, the pulse width of the Q-switched laser generally be...

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Problems solved by technology

However, due to the high heat generation of high-gain solid-state Q-switched lasers, the thermal effect in the gain region is serious, which limits its further application.

[0003] In order to improve the thermal performance of the laser, most high-gain solid-state Q-switched lasers adopt low repetition frequency pulse pumping, or limit the pump power density in the gain region, which limits the application of high repetition frequency of short pulses.

Moreover, when adjusting the repetition frequency of the laser, the pulse width of the Q-switched laser will generally become significantly wider as the repetition frequency increases, which also has a negative impact on the use of high-repetition frequency Q-switched lasers.

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