An all-fiber modular structure pump source and system for mid-infrared frequency conversion lasers

Abstract

The disclosure discloses an all-fiber modular structure pump source and system for mid-infrared frequency conversion lasers. The pump source includes an electrical drive module, a pump laser module, a low-power pre-amplification optical module and a main power amplification module. , wherein the electrical drive module provides multi-stage pumping current for the pump laser module, generates the current status signal of the pump source and sends the light output sequence command to the pump laser module; the pump laser module sends a pump signal to the amplifying optical module according to the light output sequence command Pump light; the low-power front-stage pre-amplification optical module receives the pump light and generates optical monitoring feedback and sends it to the electrical drive module to generate pre-amplified signal optical pulses and send them to the main power amplifying optical module; the main power amplifying optical module The signal light pulse is further amplified with the help of the energy of the pump light to obtain the output signal light, and a self-monitoring signal is generated and sent to the electrical drive module.

Description

technical field [0001] The invention relates to the field of lasers, in particular to an all-fiber modular pump source and system for mid-infrared frequency conversion lasers. Background technique [0002] The 3-5μm mid-infrared band laser covers the most important transmission window of the atmosphere. This band of laser has great application prospects in environmental protection, medical treatment, national defense and other fields, and is an important branch of laser technology research. Optical parametric oscillation (OPO) is one of the important nonlinear frequency conversion technologies to expand the laser output wavelength. It has become the most widely used technical means to obtain mid-infrared lasers. However, since these crystals only have a single frequency conversion function, they also need to provide fundamental frequency pump light through the gain medium doped with rare earth ions. The optical parametric oscillator will not only be affected by the fundament...

AI Technical Summary

Problems solved by technology

At present, in the reports on mid-infrared optical parametric oscillators pumped by fibers, although the fundamental frequency optical pulse waveform is compensated, in order to ensure more uniform frequency conversion and suppress the impact of nonlinear effects on the system, it is often reduced The peak power of a given pulse energy is at the cost, see the literature "Shen Y, Alam S U, Chen K K, et al.PPMgLN-Based High-Power Optical Parametric Oscillator Pumpedby Yb-Doped Fiber Amplifier Incorporates Active Pulse Shaping. IEEE Journal of Selected Topics in Quantum Electronics, 2009,15(2):385-392." Obviously, the structural design of this optical fiber pump source cannot guarantee the efficient operation of the optical parametric oscillator

Images