Multi-color femtosecond laser generator

Abstract

Provided is a multi-color femtosecond laser generating device. The multi-color femtosecond laser generating device is composed of a first focusing element, two transparent solid-state wafers, a second focusing element, a filtering small hole and two chirped mirrors, all of which are arranged on a main light path. The two transparent solid-state wafers are located at focusing lens points. By adoption of the above technical scheme, femto-second laser pulse with the widening spectrum is obtained. After a third focusing element is used, laser pulse with the widening spectrum is subjected to light-splitting operation by one of chirped mirrors. The reflected light of a dichroic mirror is incident upon transparent non-linear material by means of a delay line composed of two reflecting mirrors and another reflecting mirror. The transmission light is incident upon the non-linear material by means of the two reflecting mirrors. Multi-color femtosecond laser is obtained in such a manner that two light beams in glass sheets coincide with each other regarding time and space. The multi-color femtosecond laser generating device has following characteristics: a compact structure is obtained; the multi-color femtosecond laser generating device is economical and practical; the device is conveniently set up; and a wide spectral region and the adjustable central wavelength of polychromatic light are obtained.

Description

technical field [0001] The invention relates to a femtosecond laser, in particular to a multi-color femtosecond laser generating device. It has application prospects in many related fields such as femtosecond laser spectroscopy and femtosecond laser microscopic imaging. technical background [0002] Femtosecond lasers have important applications in many cutting-edge scientific experiments such as physical optics, chemical optics, and bio-optics. Multiple femtosecond laser spots with adjustable center wavelength can be generated at one time by cascaded four-wave mixing, which has a good application prospect. Cascaded four-wave mixing requires two beams of incident light, which can come from a hollow fiber compression device, a non-collinear parametric amplifier, or a broadband Ti:sapphire amplifier, but the device is complex, and the experimental equipment is expensive and takes up a lot of space; this The two beams of incident light can also be generated from white sapphir...

AI Technical Summary

Problems solved by technology

The cascaded four-wave mixing requires two beams of incident light, which can come from a hollow fiber compression device, a non-collinear parametric amplifier, or a broadband Ti:sapphire amplifier, but the device is complicated, and the experimental equipment is expensive and takes up a lot of space; this The two beams of incident light can also be generated from white sapphire sheets, or air filaments, but the spectral range of polychromatic light produced in this way is relatively narrow, and the aforementioned factors limit the application of devices based on cascaded four-wave mixing polychromatic light

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