Highly integrated mid-infrared broadband supercontinuum generation device and method

Abstract

The invention relates to a highly integrated mid-infrared broadband supercontinuum generation device and method, which solves the problems of complex structure, bulky size, and difficult compatibility between mode-locked laser pulses and frequency expansion material platforms in other mid-infrared supercontinuum generation schemes. The device includes a pump unit, an integrated pulse generation unit, a supercontinuum spectrum generation unit, a temperature control unit and a spectrum analysis unit. In the process of the method, the pump unit is adjusted to emit a continuous pump laser with a narrow linewidth; the integrated pulse generation unit receives the pump laser light, and a four-wave mixing process occurs to generate a stable mode-locked laser pulse; the supercontinuum generation unit receives the mode-locked laser pulse , and non-linear processes such as cascaded four-wave mixing and self-phase modulation occur to generate a mid-infrared broadband supercontinuum; use the spectrum analysis unit to observe the generated supercontinuum waveform and bandwidth, and adjust the operating temperature of the temperature control unit at the same time to realize Stable supercontinuum output. The invention can generate stable mode-locked laser pulses and realize efficient frequency expansion.

Description

technical field [0001] The invention relates to a broadband supercontinuum generation device and method, in particular to a highly integrated mid-infrared broadband supercontinuum generation device and method. Background technique [0002] The supercontinuum is generally formed by a laser pulse incident on a nonlinear medium and undergoes frequency expansion through a series of nonlinear effects. It is a basic tool in laser technology research and has extensive value in many basic frontiers and applied science fields. The mid-infrared band is not only an important atmospheric window, but also matches heat sources such as engines and power facilities. It is of great significance for military applications such as radar, guidance, detection, photoelectric countermeasures, and space communications. At the same time, the mid-infrared band covers the absorption peaks of water and amino compounds, and can be strongly absorbed by all substances containing hydroxyl or amino groups, w...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a highly integrated mid-infrared broadband supercontinuum generation device and method, which solves the problems of existing mid-infrared supercontinuum generation systems such as large volume, complex structure, low efficiency, difficulty in integration, and mode-locking. It is difficult to be compatible with the spread-spectrum material platform, and break through the existing technical bottleneck, which has great research significance and practical application value

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