Stimulated Brillouin scattering and stimulated Raman scattering combined compression ultrashort pulse laser

Abstract

The invention relates to a stimulated Brillouin scattering and stimulated Raman scattering combined compression ultrashort pulse laser, which comprises a pumping source, an optical isolation system, a half-wave plate, a first polaroid, a pulse width adjustable SBS pulse width compression system, a first reflector and an SRS generation amplification system, and is characterized in that a single longitudinal mode laser is used as the pumping source to emit pumping light; sequentially passing through an optical isolation system, a half-wave plate and a first polaroid and then entering an SBS pulse width compression system; pump light is compressed into hundred-picosecond laser in the SBS pulse width compression system, and the compressed hundred-picosecond laser is reflected by the first polaroid and the first reflector and then enters the SRS generation amplification system to be further compressed and amplified. Through the technical scheme of combined compression of the SBS pulse width compression technology and the SRS pulse width compression technology, the compression limit restriction of the SBS pulse width compression technology is overcome, and laser pulse width output with narrower pulse width than that of the Q-switched technology and higher energy than that of the mode-locked technology is achieved.

Description

technical field [0001] The invention relates to the technical field of high-energy short-pulse lasers, in particular to a compressed ultrashort-pulse laser combined with stimulated Brillouin scattering and stimulated Raman scattering. Background technique [0002] Ultrashort pulse laser has a wide range of applications in many fields such as shock dynamics, laser precision ranging, ultra-long-distance laser radar, laser medical equipment, and laser microprocessing. has important meaning. [0003] At present, there are three main ways to obtain short-pulse laser: (1) Q-switching technology, by shortening the cavity length, sub-nanosecond short-pulse laser can be obtained, combined with traveling wave amplification, sub-nanosecond high-energy laser can be obtained [such as Invention Patent Publication No. : CN110880672B, patent name: a high-repetition-frequency high-energy nanosecond-level pulse laser and its application method], but this method can no longer obtain shorter p...

AI Technical Summary

Problems solved by technology

[0003] At present, there are three main ways to obtain short-pulse laser: (1) Q-switching technology, by shortening the cavity length, sub-nanosecond short-pulse laser can be obtained, combined with traveling wave amplification, sub-nanosecond high-energy laser can be obtained [such as Invention Patent Publication No. : CN110880672B, patent name: a high-repetition-frequency high-energy nanosecond-level pulse laser and its application method], but this method can no longer obtain shorter pulses; (2) mode-locking technology, which can obtain femtosecond to Picosecond ultrashort and ultrafast pulses, but the generated pulse energy is small, usually in the nanojoule to microjoule level, and the subsequent amplification is more complicated [such as the invention patent publication number: CN101562310, patent name: passive mode-locked picosecond laser ]; (3) Stimulated Brillouin Scattering (SBS) to compress nanosecond pulses to the order of hundreds of picoseconds, and this method can obtain high-energy hundreds of picosecond lasers , but limited by physical limits, it is impossible to obtain ultrashort ultrafast pulse laser

Images