Chirp laser pulse frequency spectrum shaping system based on angular spectral dispersion

Abstract

The invention provides a chirp laser pulse frequency spectrum shaping system based on angular spectral dispersion, and relates to the technical field of laser pulse amplification. The chirp laser pulse frequency spectrum shaping system based on angular spectral dispersion comprises a chromatic dispersion module, an optical parameter conversion module, an optical delay module and a reflection module. After chirp laser pulse with frequency spectra to be shaped passes the chromatic dispersion module, light with different frequencies is dispersed by the chromatic dispersion module and then entersthe optical parameter conversion module by different incident angles, pump light pulse sequentially passes the optical delay module and the reflection module and then enters the optical parameter conversion module by incident angles non-collinear with the chirp laser pulse, the chirp laser pulse and the pump light pulse are subjected to energy transfer in the optical parameter conversion module and transmitted by the optical parameter conversion module to shape the frequency spectra of the chirp laser pulse, and the technical problems of low use rate of signal light energy, poor relative use flexibility and the like of a chirp laser pulse frequency spectrum shaping system in the prior art are relieved.

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 spectral angular dispersion. Background technique [0002] Since the appearance of laser pulses, it has been developing in the direction of shorter and shorter pulse widths and higher and higher intensities. Ultra-short and ultra-intense laser pulses have extreme physical conditions such as strong electric field, strong magnetic field, and high pressure. Since D. Strcik and G. Mourou introduced the microwave-band chirped radar technology into the field of laser pulse amplification in 1985, and then formed the chirped pulse amplification technology, the development of high-power ultrashort laser pulses has begun a new journey. So far, many laboratories and research institutions in the world have adopted CPA technology as the main amplifier, and have successively obtained ultrashort pulse output with peak pow...

AI Technical Summary

Problems solved by technology

Using this type of linear filtering technology, although the spectral width can be increased by one to two times, reaching a bandwidth of hundreds of nm, and the spectrum can be shaped, but usually the pulse contrast or signal-to-noise ratio coming out of the regenerative cavity is low; In addition, almost all these methods are in the form of clipping or clipping. At the cost of energy loss, the utilization rate of signal light energy is not high; finally, filter elements such as F-P etalons and birefringent filters generally only It is used to shape the optical spectrum of a signal. To obtain a spectrum distribution of any shape, it is necessary to redesign the device, which appears to be less flexible.

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