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Chirped pulse spectrum shaping device and method based on electro-optical modulation

A technology of chirped pulses and spectral shaping, which is applied in circuits, lasers, electrical components, etc., can solve the problems of high filter reflectivity accuracy requirements, limited high-energy amplification applications, and large introduction losses, and achieves suppression of gain narrowing and Spectral redshift phenomenon, low loss, and the effect of compensating spectral redshift

Active Publication Date: 2020-09-25
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

It can be seen that several methods currently used in petawatt laser systems in the world have the disadvantages of large introduction loss, low overall efficiency, high requirements for filter reflectivity accuracy, and complicated operation, which greatly limits the high-energy amplification. application in

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  • Chirped pulse spectrum shaping device and method based on electro-optical modulation
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  • Chirped pulse spectrum shaping device and method based on electro-optical modulation

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Embodiment Construction

[0031] The purpose of the present invention is to overcome the limitations of the existing spectrum shaping technology based on acousto-optic modulation, and provide a spectrum shaping method based on electro-optic modulation. This method is used in the Ti:Sapphire CPA amplification system. By adjusting the electro-optic phase of the stretched chirped pulse, the transmittance of different parts of the laser pulse in the time domain after passing through the analyzer is different, that is, the chirped pulse is realized. Spectral shaping. The technology has low loss, simple operation, scientific and effective.

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but the protection scope of the present invention should not be limited thereto. figure 1It is a schematic diagram of a chirped pulse spectrum shaping device for electro-optic modulation according to the present invention. It can be seen fro...

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Abstract

A chirped pulse spectrum shaping device based on electro-optical modulation comprises a stretcher, a polarizer, a first electro-optical modulator, a second electro-optical modulator and a polarizationanalyzer, wherein the stretcher, the polarizer, the first electro-optical modulator, the second electro-optical modulator and the polarization analyzer are sequentially arranged in the signal light transmission direction. The polarizer is composed of a 1 / 2 wave plate and a polarization splitting prism. The invention also provides a shaping method. The method is low in loss, free of diffraction inthe whole process and capable of supporting spectral modulation with large energy, and the adjustment is simple, and the time and the voltage of the falling edges and the rising edges of the two electro-optical modulators are respectively regulated and controlled only by adjusting the delayer, so that the spectrum shaping is realized.

Description

technical field [0001] The invention belongs to the technical field of solid-state lasers, in particular to a chirped pulse spectrum shaping device and method based on electro-optical modulation. This method can suppress the spectral narrowing and spectral redshift phenomenon caused by the gain narrowing effect and gain saturation effect in the process of chirped laser pulse amplification under large aperture, so as to realize the chirped pulse amplification with large energy and wide bandwidth. Background technique [0002] The application of Chirped Pulse Amplification (CPA) technology has enabled the rapid development of ultra-intensive and ultra-short laser systems, among which the CPA technology based on Ti:Sapphire is even more important in Petawatt (PW) ultra-intense and ultra-short laser pulse systems. mainstream technical solutions. After the broadband ultrashort seed laser pulse passes through the stretcher, it will introduce dispersion into chirped pulse light, a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/00H01S3/107
CPCH01S3/0057H01S3/107
Inventor 吕欣林彭宇杰王新亮冷雨欣
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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