A Broadband Optical Parametric Amplifier Based on Double Nonlinear Optical Processes

Abstract

The invention discloses a broadband optical parametric amplifying device based on double nonlinear optical process, which mainly includes fundamental frequency light, signal light, beam splitting mirror, beam combining mirror, frequency doubling crystal, optical parametric amplifying crystal and other devices. The fundamental frequency light passes through the frequency doubling crystal to generate the pump light, and then the signal light is parametrically amplified by the pump light in the optical parametric amplifier crystal, and a beam of fundamental frequency light is incident at the same time, so that the fundamental frequency light and the parametric amplification process produce The idle light is summed and the idle light is consumed, thereby suppressing the inverse conversion process of optical parametric amplification, and realizing optical parametric amplification with higher efficiency and wider bandwidth. Since the two nonlinear optical processes of optical parametric amplification and sum-frequency are both parametric processes, the heat accumulation effect is extremely low, and can be realized simultaneously in many crystal materials and in a wide wavelength range, so the present invention is not only applicable to High peak power, high average power, etc., can also be applied to optical parametric amplification of different crystals and different wavelength bands.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a broadband optical parametric amplifying device based on a double nonlinear optical process. Background technique [0002] Ultra-short and ultra-intensive laser pulses can generate ultra-high peak power and ultra-strong electric field strength in a very short time scale, and have important applications in many cutting-edge fields. As an alternative technology to traditional laser amplification, optical parametric amplification has many advantages, such as high conversion efficiency, wide gain bandwidth, low thermal accumulation effect, high signal-to-noise ratio, and flexible frequency tuning. means. However, due to material dispersion, inverse conversion and energy return in the process of optical parametric amplification are the key factors restricting the gain bandwidth, conversion efficiency, pulse compression width and peak power improvement of the laser system,...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems faced in the current high-efficiency broadband optical parametric amplification process, the present invention proposes a broadband optical parametric amplification device based on a dual nonlinear optical process, aiming to solve the problem of gain narrowing and energy loss caused by inverse conversion in the current optical parametric amplification. Reflow problems, and overcome the limitations of material selection, crystal application conditions, applicable laser wavelength range, etc., to improve the overall performance of the optical parametric amplification system

Images