Multi-color femtosecond laser generation device based on white light generation

Abstract

A white light generation based multi-color femtosecond laser generation device is characterized in that a splitting piece is arranged on a main light path to divide incident light into reflected light and transmission light; the reflected light is focused on a nonlinear crystal after sequentially passing a first attenuation piece, a first lens, a white gem piece, a first concave surface reflecting mirror, a small hole diaphragm, a chirp mirror and a second concave surface reflecting mirror; the transmission light is focused on the nonlinear crystal to be served as pump light after sequentially passing a second attenuation piece, a delay line which is formed by a first reflective mirror and the second reflective mirror, a third reflective mirror, a fourth reflective mirror, a fifth reflective mirror and a second lens. The white light generation based multi-color femtosecond laser generation device has the advantages of being simple in adjustment, compact in structure, stable in light of output signals and the like.

Description

technical field [0001] The invention relates to a multicolor femtosecond laser, in particular to a multicolor femtosecond laser generating device based on white light generation. Background technique [0002] Multicolor femtosecond lasers have important applications in many cutting-edge scientific experiments such as physical optics, chemical optics, and biological optics. The pulse width is short enough, the energy is strong enough, and the center wavelength of the multicolor femtosecond laser is adjustable. The development of cutting-edge science has a very important meaning. In the past, cascaded four-wave mixing polychromatic femtosecond laser generation devices either used hollow-core fibers to expand the spectrum of the incident pump, which made the experimental device more space-consuming and complicated to adjust the hollow-core fibers, or used NOPA to generate adjustable incident pumps. Pump light, which leads to an uncompact arrangement of experimental devices, re...

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Problems solved by technology

In the past, cascaded four-wave mixing polychromatic femtosecond laser generation devices either used hollow-core fibers to expand the spectrum of the incident pump, which made the experimental device more space-consuming and complicated to adjust the hollow-core fibers, or used NOPA to generate adjustable incident pumps. Pumping light, which leads to the experimental device arrangement is not compact, the cost of the experiment is relatively large, and the spectral range of polychromatic light produced in the past is narrow, these factors limit the application of polychromatic femtosecond laser to a certain extent

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