Multi-color femtosecond laser generator

A technology of femtosecond laser and generating device, which is applied in the field of femtosecond laser, can solve the problems of complex device, expensive experimental equipment and space occupation, narrow spectrum range of polychromatic light, etc.

CN104914645BActive Publication Date: 2018-02-13SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-02-13

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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.
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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...

Examples

Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0017] Such as figure 1 As shown, it can be seen from the figure that the multicolor femtosecond laser generating device of the present invention includes: a first focusing element 1, a first transparent solid sheet 2, a second transparent solid sheet 3, and a second focusing element 4 are sequentially arranged along the direction of the incident light path , filter pinhole 5, first chirped mirror 6, second chirped mirror 7, neutral density attenuation sheet 8, third focusing element 9, dichroic mirror 10, described dichromatic mirror 10 laser pulse after spectral broadening It is divided into reflected light and transmitted light. After the reflected light passes through the first reflector 11, the second reflector 12 and the third reflector 15, it is incident on the nonlinear transparent...