A double synchronously pumped Raman laser amplification device and method

Abstract

The invention discloses a double synchronously pumped Raman laser amplification device and method, comprising: a picosecond multi-pulse laser, a Raman synchronous pump cavity A, a traveling wave amplifier and a Raman synchronous pump cavity B; a picosecond multi-pulse laser After the picosecond pulse output by the laser is split by the first beam splitter, the reflected light enters the traveling wave amplifier for amplification to obtain amplified fundamental frequency light; the transmitted light enters the Raman synchronous pump cavity A for stimulated Raman scattering to obtain Stokes seeds Light: the amplified fundamental frequency light and the Stokes seed light are combined by the second beam splitter and then enter the Raman synchronous pump cavity B for Raman synchronous amplification, and output the high-order Stokes light after Raman synchronous amplification. The present invention combines picosecond multi-pulse technology, Raman synchronous pumping technology, and Raman amplification technology, can effectively improve picosecond Raman gain, and obtain picosecond high-order Stokes light output with high energy.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a double synchronously pumped Raman laser amplification device and method. Background technique [0002] The spectrum in the picosecond infrared band has very important applications in the fields of laser ranging, laser remote sensing, national defense and security, and stimulated Raman scattering is one of the effective ways to obtain the infrared band. With the common 1064nm as the fundamental frequency light and high-quality Raman medium, the commonly used 1.3μm, 1.5μm, and even 2μm infrared spectra can be obtained. [0003] For picosecond stimulated Raman scattering, the ultra-short interaction time between light and the medium and the large quantum bandwidth between the fundamental frequency light in the infrared band and the Stokes light will lead to lower Raman gain, thus limiting the picosecond Stokes Light develops to a higher order. Therefore, it is of great research s...

AI Technical Summary

Problems solved by technology

[0004] Existing picosecond infrared Raman schemes mainly focus on picosecond laser pulses with a repetition frequency of MHz. The single pulse energy is weak, resulting in low Raman gain, which is not conducive to the excitation of high-order Stokes light, and the Raman synchronous pump cavity The cavity length is too long, the reliability is poor

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