All-fiber high-energy super-continuum spectrum laser

Abstract

The invention relates to an all-fiber high-energy super-continuum spectrum laser. The laser comprises a pump laser, an optical fiber amplifier, an optical fiber amplifier tail fiber, a transition optical fiber and a multi-core high-nonlinearity optical fiber, wherein a tail fiber of the optical fiber amplifier, the transition optical fiber and the multi-core high-nonlinearity optical fiber are sequentially welded, so the tail fiber of the optical fiber amplifier is matched with the mode field of the multi-core high-nonlinearity optical fiber, and all-fiber and high-energy output of the super-continuum spectrum laser are guaranteed. According to the all-fiber high-energy super-continuum spectrum laser, the laser with monopulse energy reaching the hundred-microfocus magnitude is used for pumping the multi-core high-nonlinearity optical fiber, and defects of low damage threshold of the single-core high-nonlinearity optical fiber, large welding loss of the multi-core high-nonlinearity optical fiber and the amplifier tail fiber and low coupling efficiency are overcome; the single pulse energy of the super-continuum spectrum laser generated by the invention reaches the micro-focus magnitude, and the working distance of the super-continuum spectrum laser is further improved.

Description

technical field [0001] The invention relates to the field of fiber lasers, in particular to an all-fiber high-energy supercontinuum laser. Background technique [0002] A supercontinuum laser is a high-brightness ultra-broadband laser source, specifically referring to coupling an ultrashort pulse laser with high peak power into a highly nonlinear fiber, and using various nonlinear effects of the fiber to greatly broaden the spectrum of the output light , so as to achieve ultra-wide spectral output. Such laser light sources play a role in many application scenarios. Among them, high-energy supercontinuum light sources can be applied to long-range hyperspectral radar detection and other fields, and supercontinuum light sources with different working bands can be used to detect different biological species, which greatly promotes the development of biodiversity remote sensing detection technology. [0003] At present, the two main reasons for realizing all-fiber supercontinuu...

AI Technical Summary

Problems solved by technology

High-energy supercontinuum often requires more than 100 microjoules of laser to pump, and the conventional single-core high nonlinear fiber cannot bear such a large energy

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