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Self-correlation instrument for measuring ultra-short laser impulse width

A technology of pulse width and autocorrelator, applied in instruments and other directions, can solve problems such as low measurement sensitivity, achieve high measurement accuracy, wide measurement range, and increase measurement accuracy.

Inactive Publication Date: 2008-08-20
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide an autocorrelator for measuring ultra-short pulse width in order to overcome the shortcomings of existing intensity autocorrelator optical path occlusion and relatively low measurement sensitivity, which overcomes the problem of optical path occlusion in the measurement process , improved measurement sensitivity, able to measure femtosecond or austosecond laser pulse width

Method used

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  • Self-correlation instrument for measuring ultra-short laser impulse width
  • Self-correlation instrument for measuring ultra-short laser impulse width

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Embodiment Construction

[0011] The present invention will be described in further detail below in conjunction with the embodiment given with accompanying drawing.

[0012] refer to figure 1 , an autocorrelator for measuring ultra-short pulse width, consisting of a fixed focusing mirror 1, a moving focusing mirror 2 driven by a motor 3, a nonlinear optical harmonic generator 4, an optical filter 5 and a photodetector 6 , which is characterized in that the nonlinear optical harmonic generator 4 is arranged outside the propagation path of the incident light beam, the incident light pulse is reflected by the fixed focusing mirror 1 and the moving focusing mirror 2 and divided into two beams of light, and the two beams of light are focused simultaneously into the nonlinear optical harmonic generator 4.

[0013] The incident light pulse is reflected by the fixed focusing mirror 1 and the moving focusing mirror 2 and divided into two beams of light, and the two beams of light are focused off-axis into the...

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Abstract

The present invention relates to a measuring device for measuring the width of the ultrashort laser impulse, especially a self-correlation device which can realize the non-single beam harmonic ambient light and measures the width of the ultrashort laser impulse. The measuring device is composed of a fixed focusing reflecting mirror, a mobile focusing reflecting mirror driven by the motor, a nonlinear optical harmonic producer, a spectral filter and a photodetector, the nonlinear crystal is arranged outside the transmitting path of the incident beam, the incident light impulse is divided into two beams of light after the reflection of the fixed focusing reflecting mirror and the movable focusing reflecting mirror, and the two beams of light simultaneously focus into the nonlinear crystal. The invention can eliminate the single beam harmonic ambient light and the higher measurement precision is provided, the off-axis measurement eliminates the blocking problem of the light path and increases the measuring sensitivity and wider measuring rage is provided, and the measurement of femtosecond (10<-15>) and attosecond (10<-18>) laser pulsewidth.

Description

technical field [0001] The invention relates to a test device for measuring the ultrashort laser pulse width, in particular to an autocorrelator capable of realizing the test pulse width without single-beam harmonic background light measurement and optical path unblocked measurement. Background technique [0002] At present, the known ultrashort pulse measurement mostly uses the intensity autocorrelation method. The existing autocorrelator for measuring the ultrashort laser pulse width mainly consists of a moving focusing mirror (driven by a motor), a fixed focusing mirror, a nonlinear optical harmonic Composed of generator and detector. [0003] Nonlinear optical harmonic generators are usually made of nonlinear optical crystals (BBO, KDP, KTP, etc.), nonlinear optical polymer films (azo-doped polyimide, etc.) or nonlinear optical liquids. [0004] There are two types of autocorrelators, collinear and non-collinear. Generally, the one-way displacement scanning method is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
Inventor 王希军
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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