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Laser pulse width control method and device

A pulse width control and laser technology, which is applied in lasers, laser components, optics, etc., can solve the problems of laser pulse width control, ultraviolet laser pulse width control, etc., and achieve the effect of no synchronization stability problem, convenient and flexible use

Inactive Publication Date: 2006-11-08
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0006] The object of the present invention is to provide a laser pulse width control method and device to solve the problem of the stability of laser pulse width control and the control of ultraviolet laser pulse width

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  • Laser pulse width control method and device

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0020] see first figure 1 , figure 1 It is a structural schematic diagram of the laser pulse width control device of the present invention. The embodiment of the present invention is a control device for controlling the pulse width of a 532nm or 355nm frequency-doubled laser by using a 1064nm pump laser.

[0021] A laser pulse width control method. When the solid-state frequency-doubling laser 1 is used to output 532nm or 355nm frequency-doubling laser, the same laser beam also contains the remaining 1064nm pump laser, and two beam splitters are used to separate the pump laser and frequency-doubling Laser, the separated pump laser 3 uses the optical path retarder 4 to change the optical path, and then focuses with the first lens 6 to generate plasma 8 on the air and coppe...

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Abstract

This invention relates to a control method for laser pulse width and a device, in which, said method utilizes the pump laser output by a solid multiple frequency laser at the same time to generate plasmas in air and on a copper target after being focused to control the pulse width of the multiple frequency laser, the device is composed of a solid multiple frequency laser, a light splitting filter, an optical path delay, a first lens, a copper target in air and a second lens, the focusing point region after focusing of the multiple frequency laser and that of the pump laser are coincident, which solves the problem of controlling the pulse width of multiple frequency laser and its stability by adjusting range of pump laser and altering the time for generating plasmas.

Description

technical field [0001] The present invention relates to laser pulse width control, especially a laser pulse width control device, which uses the plasma generated by the focus of the remaining pump laser after generating frequency-doubled laser as a switch to control the laser pulse width, and can also be within a certain range The pulse width is continuously adjusted. Background technique [0002] The existing mature technology to realize laser pulse width control is to use some crystals to change the polarization direction of the passing laser under the action of an external electric field, and to synchronize or change the time of the external electric field and the laser reaching the crystal to control the passing laser pulse width. The main difficulties with this method are: [0003] 1. The rising edge of the applied electric field pulse on the crystal is very demanding, and the time must reach or be less than the rising edge of the laser pulse width; [0004] 2. Synchr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35H01S3/00H01S3/08H01S3/10
Inventor 楼祺洪董景星李红霞魏运荣周军
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI