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Single Grating Multipass Pulse Width Stretcher

A single grating and stretcher technology, applied in the laser field, can solve problems such as inconvenience of use, and achieve the effect of increasing the effect of pulse width stretching

Inactive Publication Date: 2015-10-28
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the existing stretchers use the single-grating four-way stretching method. In order to increase the stretching effect in this way, the parameters must be changed and the optical path must be readjusted.
[0003] In addition, with the increase of the stretching amount, the volume of the stretcher also increases rapidly, which brings inconvenience to the use

Method used

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  • Single Grating Multipass Pulse Width Stretcher

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Such as figure 1 As shown, in one embodiment of the present invention, the present invention provides a single-grating multi-pass pulse width stretcher, which includes: an optical isolation unit for the introduction and export of incident light and outgoing light, wherein the incident light is Horizontally polarized light; a four-pass single grating stretching unit, used to stretch the laser pulse; a pass number control unit, used to control the laser pulse stretching multiple.

[0034] Such as figure 2 As shown, the optical isolation unit in the present invention includes a film polarizer A1, a Faraday rotator 2 and a half-wave plate A3, wherein the film polarizer A1, the Faraday rotator 2 and the half-wave plate A3 are arranged in sequence along the incident light direction. First, the incident light first passes through the film polarizer A1, and then pass...

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Abstract

The invention relates to the technical field of laser, in particular to a single-grating multi-pass pulse widening device which comprises an optical isolation unit, a four-pass single-grating widening unit and a pass number control unit. The optical isolation unit is used for leading in and leading out of incident light and emergent light, the four-pass single-grating widening unit is used for widening laser pulses, and the pass number control unit is used for controlling laser pulse widening magnification. The single-grating multi-pass pulse widening device with the structure has the advantages that a pulse widening effect can be multiplied under the condition that the structure of the widening device is unchanged, and optical paths are not required to be adjusted when the pulse widening effect is multiplied; and the widening magnification can be controlled optionally, so that a perfect widening effect can be realized.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a single-grating multi-pass pulse width stretcher. Background technique [0002] At present, with the demand for ultrashort pulse lasers with high repetition frequency and high pulse energy, the requirements for their single pulse energy are also getting higher and higher. In order to obtain more single pulse energy, it is generally necessary to broaden the ultrashort pulse width first. Then zoom in, which can improve the energy extraction efficiency and increase the damage threshold. However, most of the existing stretchers use the single-grating four-way stretching method. In order to increase the stretching effect in this way, the parameters must be changed and the optical path must be readjusted. [0003] In addition, with the increase of the stretching amount, the volume of the stretcher also increases rapidly, which brings inconvenience to use. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35G02F1/09
Inventor 陈檬陈立元李港彭志刚樊仲维杨军红麻云凤
Owner BEIJING UNIV OF TECH
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