Multi-wavelength femtosecond Raman fiber laser

Abstract

The invention relates to a multi-wavelength femtosecond Raman fiber laser. According to an adopted self-similarity pulse amplification method, a non-linear effect in optical fibers is utilized actively, and by adjusting the peak value in pulses in a pulse width control part, the main amplifying part laser has higher peak value, thereby triggering a high-order Raman effect, expanding pulse spectrum, and obtaining multi-order stokes and anti-stokes radiation to realize multi-wavelength output; and finally, the multi-wavelength femtosecond laser with central wavelength of 1,030nm and a spectral region of 860-1,330nm is obtained. In the high-power amplification engineering, each stokes and anti-stokes radiation has relatively high strength, so that the obtained laser of each wavelength has super-high peak value, relatively wide spectrum width and femtosecond-scale time width, which are advantages un-possessed by other multi-wavelength lasers.

Description

technical field [0001] The invention relates to a laser, in particular to a multi-wavelength femtosecond Raman fiber laser. Background technique [0002] Today's fiber lasers play a particularly important role in the development of lasers because of their good compatibility with fiber optic devices, good beam quality, and low cost. As a light source that can output multi-wavelength laser light, multi-wavelength fiber lasers have broad application prospects in optical fiber transmission, optical detection, and optical fiber communication systems. Ultrafast fiber lasers such as femtosecond fiber lasers have more advantages such as high single pulse energy and small heat-affected area. Therefore, it is more used in various fields such as micro-nano processing, medical surgical devices, super-resolution imaging, and mid-to-far infrared remote sensing. At present, there are few domestic reports on high-energy ultrafast fiber lasers that can achieve multi-wavelength output, so t...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that fiber femtosecond lasers cannot realize ultrashort pulse output at multiple wavelengths respectively, and proposes a multi-wavelength femtosecond Raman fiber laser to realize high-power multi-wavelength femtosecond laser output

Images