Microchip laser device with reliable structure convenient for optical fiber output

Abstract

The invention discloses a microchip laser device with a reliable structure convenient for optical fiber output. Pump space light is received through a beam shaping lens module, and situations of a unstable output mode and a unstable repetition frequency of the microchip laser device due to changes of a multimode optical fiber when the multimode optical fiber is adopted to receive pump light are avoided. Besides, pump light output has two-dimensional direction light beam quality non-uniformity, a general output shape is an oval light cone, the pump space light is shaped through the light beam shaping lens module to improve light beam quality, structural stability is good, and packaging is convenient. In the scheme, a linear arrangement structure is stable and reliable, light path adjustmentis realized, and mass production is facilitated. A coated optical fiber head is installed at a tail end of a second collimating and focusing lens module, optical fiber output connection is facilitated, application is convenient, and optical fiber amplification of a subsequent laser is facilitated.

Description

technical field [0001] The invention relates to a microchip laser device with reliable structure and convenient fiber output. Background technique [0002] The microchip solid-state laser can realize laser output with narrow pulse width and high repetition frequency, amplify the microchip laser seed signal, and the peak pulse power can reach kW or even MW level. The conventional amplifier mainly uses the post-stage solid gain crystal to amplify the microchip laser. Amplification, and the solid device of the microchip seed source increases the instability of the optical path, making it restricted in industrial applications. In addition, the pump light input fiber of the existing microchip laser device is mostly a multimode fiber, and the swing and coiling of the multimode fiber will cause changes in the optical parameters such as the mode and power of the pump laser, and then affect the output of the microchip laser crystal. Parameters have an impact, such as causing instabi...

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Problems solved by technology

[0002] The microchip solid-state laser can realize laser output with narrow pulse width and high repetition frequency, amplify the microchip laser seed signal, and the peak pulse power can reach kW or even MW level. The conventional amplifier mainly uses the post-stage solid gain crystal to amplify the microchip laser. Amplification, and the solid device of the microchip seed source increases the instability of the optical path, making it restricted in industrial applications

In addition, the pump light input fiber of the existing microchip laser device is mostly a multimode fiber, and the swing and coiling of the multimode fiber will cause changes in the optical parameters such as the mode and power of the pump laser, and then affect the output of the microchip laser crystal. Parameters affect, such as causing the output laser mode to be unstable, the repetition frequency to be unstable, etc.

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