Chirp laser pulse spectrum shaping system based on Mach-Zehnder interferometer

Abstract

The invention provides a chirp laser pulse spectrum shaping system based on a Mach-Zehnder interferometer, and relates to the technical field of laser pulse amplification. The chirp laser pulse spectrum shaping system based on a Mach-Zehnder interferometer includes a laser emitting module and a beam splitting module, an optical length adjusting module and a beam combining module. The beam splitting module is arranged behind the laser emitting module. The laser emitting module is configured to generate a chirp laser pulse. The beam splitting module is configured to split the chirp laser pulse into multiple optical paths. The optical length adjusting module is arranged behind the beam splitting module, and is disposed in any split optical path. The optical length adjusting module is configured to adjust the optical length of the optical path. The beam combining module is arranged behind the optical length adjusting module and is configured to enable the chirp laser pulses with differentoptical lengths to converge and to emit the chirp laser pulses suffering from interference. The chirp laser pulse spectrum shaping system solves the gain narrowing of the spectrum during the amplification of the chirp laser pulses in the prior art.

Description

technical field [0001] The invention relates to the technical field of laser pulse amplification, in particular to a chirped laser pulse spectrum shaping system based on a Mach-Zehnder interferometer. Background technique [0002] The birth of laser provides a new controllable light source for human beings. The shorter and shorter pulse width and higher intensity are one of the goals of pursuing laser pulses. After the development of Q-Swithing, Mode-Locking, and Collision Mode-Locking technologies, the pulse width of the laser pulse has gradually changed from nanoseconds (ns, 10 -9 -10 -10 s), picosecond (ps, 10 -12 s) magnitude shortened to femtosecond (fs, 10 -15 s) even A Miao (as, 10 -18 s) magnitude. Ultra-short laser pulses (ps level and below) have extremely short pulse durations, which can concentrate light energy in time to form ultra-high peak power and electric field strength, so in fields such as strong field physics, material physics, fusion fast ignition ...

AI Technical Summary

Problems solved by technology

Although it is easier to obtain ultra-high-intensity ultra-short laser pulses using CPA technology, it still has some unavoidable defects, especially the spectral gain narrowing and gain saturation effects in the amplification process are more obvious, which affect the recompressed pulse. less than original width

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