Mid-infrared ultra-fast laser source device

Abstract

The invention provides a mid-infrared ultrafast laser source device. The device comprises: a supercontinuum module which is used for broadening the spectrum of a seed source laser to form supercontinuum lasers and outputting to a frequency selecting module; the frequency selecting module which is used for selecting a low frequency laser and a high frequency laser in the supercontinuum lasers and making a preparation for the subsequent difference frequency generation; and a self-difference frequency generation module which is used for carrying out difference frequency generation on the low frequency and the high frequency laser selected by the frequency selecting module, thereby generating a mid-infrared ultrafast laser. The device provided by the invention has the beneficial effects that the mid-infrared ultrafast laser is obtained by adopting a supercontinuum self-difference frequency generation scheme, so that the bottleneck that limited to the factors of the absorption emission spectrum range of a laser gain medium, the working wavelength and bandwidth of a mode-locked device, the radiation wavelength of a pumping source, the efficiency and the like, the purpose of directly obtaining the wavelength range and the pulse width of the mid-infrared ultrafast laser from an all-solid-state ultrafast laser is limited is broken through.

Description

technical field [0001] The invention relates to the technical field of mid-infrared ultrafast lasers, in particular to a mid-infrared ultrafast laser source device. Background technique [0002] Mid-infrared ultrafast laser has the advantages of both mid-infrared band and ultrafast laser, and has important applications in scientific research, medical treatment, industry, military and other fields, and has become a research hotspot. [0003] At present, there are two main methods for producing mid-infrared ultrafast lasers: direct generation of ultrafast lasers and indirect generation of nonlinear frequency conversion. Ultrafast lasers that directly generate ultrafast lasers in the mid-infrared band include all-solid-state ultrafast lasers, quantum cascade lasers, and so on. As far as the all-solid-state ultrafast laser is concerned, the gain medium, mode-locking device, and pump source are three important factors for obtaining ultrafast laser with wide wavelength range and ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned defects in the prior art, and provide a mid-infrared ultrafast laser source device using supercontinuum self-difference frequency, which solves the problem of complex structure of the existing system, difficult adjustment, and The pump source and nonlinear crystal requirements are relatively high

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