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Laser device based on cascaded stimulated scattering

A stimulated Raman scattering and laser technology, applied in the field of nonlinear optics, can solve the problems of low compression efficiency and unsatisfactory output light compression ratio, and achieve the effects of low cost, easy operation and strong practicability

Pending Publication Date: 2019-07-16
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Moreover, after only one SBS and one SRS effect, the final output light compression ratio is not very ideal, and the compression efficiency is low. This application provides a laser based on cascaded stimulated scattering

Method used

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  • Laser device based on cascaded stimulated scattering
  • Laser device based on cascaded stimulated scattering

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Experimental program
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Embodiment

[0074] see figure 1 , using Nd:YAG pulsed solid-state laser output wavelength 1064nm, energy 200mJ, pulse width 8ns, exit beam diameter ф7mm, divergence angle 3mrad of s-polarized light as the pump source, fill the SBS liquid pool with highly transparent 1064nm light SBS liquid medium FC-40. It is measured that after the pump light passes through the SBS compact double-cell module 2, the pulse width of the first-order compressed light output by the first analyzer 4 is compressed to about 1.3ns, and the energy is 150mJ. Then it is amplified by a traveling wave amplifier, and the detected energy after amplification is about 550mJ.

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Abstract

The invention relates to a laser device based on cascaded stimulated scattering. An existing gas Raman laser device is only subjected to one-time SBS and one-time SRS effects, so that the output lightcompression efficiency is low. The invention provides the laser device based on the cascaded stimulated scattering. A first stimulated scattering part comprises a pulse laser device and an SBS compact two-cell assembly; the SBS compact two-cell assembly comprises a first polarization analyzer; a second stimulated scattering part is arranged below the first polarization analyzer; the second stimulated scattering part comprises a first travelling wave amplifier and an SBS focusing single-cell assembly; the SBS focusing single-cell assembly comprises a second polarization analyzer; a third stimulated scattering part is arranged below the second polarization analyzer; the third stimulated scattering part comprises a second travelling wave amplifier and an SRS focusing single-cell assembly; the SRS focusing single-cell assembly comprises a third polarization analyzer; and a light output part is arranged below the third polarization analyzer. The cascaded SBS effect and the travelling waveamplifiers improve the peak power of seed light and improve the SRS effect.

Description

technical field [0001] The application belongs to the technical field of nonlinear optics, in particular to a laser based on cascaded stimulated scattering. Background technique [0002] Stimulated scattering (including SBS and SRS) is an important technical means to obtain high-energy narrow pulses, including stimulated Brillouin scattering and stimulated Raman scattering. The SRS effect not only has good directionality, pulse compression Compared with the SBS effect, it can not only realize the compression of the pulse width, but also realize the wavelength conversion, and can obtain different multiple spectrums for different scattering media, which has always been a hot spot of people's attention and research. For SRS media, the selected media for stimulated Raman scattering are generally solid and gas, both of which have different advantages and disadvantages. Although solid Raman scattering media have a high gain coefficient, they are limited by the thermal damage thres...

Claims

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Application Information

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IPC IPC(8): H01S3/30
CPCH01S3/305
Inventor 李永亮王驰张翼鹏张英明
Owner CHANGCHUN UNIV OF SCI & TECH
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