面向DIAL应用的单频光纤激光的稳频与放大技术

项目名称： 面向DIAL应用的单频光纤激光的稳频与放大技术

项目编号： No.61275186

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 冯素娟

作者单位： 中国科学院合肥物质科学研究院

项目金额： 75万元

中文摘要： 本项目拟利用光纤激光器在近红外波段的丰富波长资源，发展满足DIAL大气分子探测要求的新型激光系统，以解决制约DIAL技术发展光源瓶颈问题。通过研究HC-PCF吸收池的气体饱和吸收特性及其影响因素，提出能改善稳频精度的HC-PCF优化设计参数，解决全光纤型低压HC-PCF气体腔的研制技术问题，实现对单频光纤激光器的高精度稳频；通过抑制SBS效应对单频高功率光纤放大器输出功率的影响，解决低占空比单频脉冲光纤放大过程中的波形失真与噪声积累问题，构建满足DIAL系统应用要求的光纤型MOPA激光光源系统。通过本项研究，将为新型实用化DIAL光纤激光光源系统的发展奠定理论与技术基础，具有极其重要的科学意义和实用价值。

中文关键词： 激光稳频；光子晶体光纤；光纤放大；受激布里渊散射；单频激光

英文摘要： This research project plans to find new solutions to the laser source "bottlenecks" obstructs hindering the current differential absorption lidar(DIAL) systems for atmospheric molecule exploration applications by utilizing the rich wavelength resources of near-infrared region fiber laser techniques. By studying the influences of the specifications of the hollow-core photonic crystal fiber (HC-PCF) on the saturable absorption characteristics of the gas filled in the HC-PCF, we can obtain the optimized specifications of the HC-PCF for developing the gas-filled HC-PCF cell with very narrow saturable absorption spectrum, and achieve the high-precision frequency stabilization for the single-frequency fiber laser by using the narrow absorption peak of the developed the all-fiber low-pressure gas-filled HC-PCF cell as the frequency reference. A high power single-frequency laser fiber amplifier system may be developed by having suppressed the stimulated Brillouin scattering (SBS) effect in the single-frequency light signal fiber amplification, weakened the waveform distortion caused by the gain dynamics of rare-earth doped fibers and decreased the amplified spontaneous emission (ASE) noise accumulation generated in the low duty cycle pulse fiber amplification. Finally, a maser -oscillator power-amplifier (MOPA) fiber la

英文关键词： laser frequency stabilization；photonic crystal fiber(PCF)；fiber amplification；Stimulated Brillouin Scattering(SBS)；single-mode laser