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Signal to noise ratio improving device and method for chirped pulse laser

A chirped pulse and signal-to-noise ratio technology, which is applied in the field of devices for improving the signal-to-noise ratio of chirped pulse lasers, can solve the problems of ineffective suppression of noise, difficult control of parameters, and low conversion efficiency, achieving low loss and high conversion efficiency , to avoid the effects of non-linear effects

Active Publication Date: 2014-02-12
先进光电子(重庆)有限公司
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Problems solved by technology

[0009] The object of the present invention is to provide a signal-to-noise ratio improvement device and method for chirped pulse lasers, which solves the problem of low conversion efficiency, difficult control of parameters, and inability to effectively suppress down to Hundreds of ps noise and high cost technical problems

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  • Signal to noise ratio improving device and method for chirped pulse laser
  • Signal to noise ratio improving device and method for chirped pulse laser
  • Signal to noise ratio improving device and method for chirped pulse laser

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Embodiment Construction

[0034] like figure 1 , a device for improving the signal-to-noise ratio of a chirped pulse laser, comprising at least one stage of Mach-Zehnder filter for filtering the laser light emitted by the chirped pulse amplifying laser system 1; the Mach-Zehnder filter includes two arms Mach-Zehnder structure with equal optical length, half-wave plate 4 inserted into one arm of Mach-Zehnder structure, Pockel cell 8 inserted into the other arm of Mach-Zehnder structure, and n-order full-wave plate 9, general The positions of the Kerr cell 8 and the n-stage full-wave plate 9 can be interchanged.

[0035] The optical axis of the half-wave plate 4 is 45° to the polarization direction of the incident laser light, and the half-wave plate 4 is a zero-order half-wave plate 4 for the center wavelength of the laser, so that the polarization of the center wavelength is rotated by 90°. The optical axis of the n-order full-wave plate 9 is at 45° to the polarization direction of the incident laser ...

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Abstract

The invention provides a signal to noise ratio improving device and method for chirped pulse laser. The signal to noise ratio improving device and method for the chirped pulse laser solves the technical problems that an existing signal to noise ratio improving device for ultrashort pulse is low in transformation efficiency, parameters are hard to control, noise under ns and even ps cannot be restrained effectively, and cost is high are solved. A pockels cell and a specially designed n-level full-wave plate are inserted into one path in a Mach-Zehnder structured light path, a half wave plate is inserted into another path, and the pockels cell is driven to carry out scanning and filtering by adopting a conductive switch. The signal to noise ratio improving device and method for the chirped pulse laser have the advantages that conversion efficiency is high, the signal to noise ratio improving device can be used in a cascade connection mode, and an unnecessary nonlinearity function is avoided at the same time.

Description

technical field [0001] The invention relates to a device and method for improving the signal-to-noise ratio of chirped pulse laser. Background technique [0002] In recent years, ultrashort pulse laser technology has developed rapidly. The laser pulse generation and amplification technology of picosecond to femtosecond level has been able to generate ultrashort pulses with peak power of terawatts or even pawatts at the mesa size. At present, the main amplification technology for generating strong laser ultrashort pulses, chirped pulse amplification (CPA), produces strong spontaneous emission amplification (ASE) at the front and rear edges of the laser pulse during the amplification process, and it is When a seed pulse is selected, it will also have a sub-pulse. Although these leading-edge and sub-pulse noises are orders of magnitude smaller in intensity than the main laser pulse, they are extremely unfavorable factors in experiments where ultra-intense ultra-short pulse las...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28
Inventor 王屹山王向林赵卫贺俊芳刘百玉
Owner 先进光电子(重庆)有限公司
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