光学学报, 2019, 39 (12): 1214002, 网络出版: 2019-12-06
基于反共振空芯光纤的4.3 μm二氧化碳激光器 下载: 1191次
Anti-Resonant Hollow-Core Fibers Based 4.3-μm Carbon Dioxide Lasers
摘要
报道了一种基于充有二氧化碳气体反共振空芯光纤的新型中红外光纤激光器。用一个掺铥光纤放大的可调谐2 μm半导体激光器泵浦一段长为5 m、充有低压二氧化碳的低损耗反共振空芯光纤,基于粒子数反转实现了单程结构4.3 μm光纤激光输出,这是已经报道的常温下连续波光纤激光输出的最长波长(超连续谱激光除外)。气压为500 Pa时,R(30)吸收线对应的最大激光输出功率为82 mW,斜率效率约为6.8%(相对耦合进入空芯光纤的泵浦功率);R(28)吸收线对应的最大输出功率为63 mW,斜率效率约为5%。该研究为实现高效紧凑的4 μm中红外激光器提供了一条简单可行的技术途径。
Abstract
A novel mid-infrared fiber laser is reported based on an anti-resonant hollow-core fiber filled with carbon dioxide gas. A tunable 2-μm semiconductor laser amplified using a thulium-doped fiber is used to pump a low-loss anti-resonant hollow-core fiber with a length of 5 m, which is filled with carbon dioxide gas at low pressure. Particle beam inversion is responsible for obtaining the single-pass fiber laser output at 4.3 μm, which is the longest wavelength that has yet been reported for continuous wave fiber lasers at normal temperature, except for supercontinuum lasers. At a pressure of 500 Pa, the maximum laser output power of the R(30) absorption line is 82 mW and the slope efficiency is approximately 6.8% (relatively coupled pump power entering the hollow-core fiber), whereas the maximum laser output power of the R(28) absorption line is 63 mW and the slope efficiency is approximately 5%. This study provides a potentially effective pathway for obtaining compact and efficient 4-μm fiber gas lasers.
崔宇龙, 周智越, 黄威, 李智贤, 王泽锋. 基于反共振空芯光纤的4.3 μm二氧化碳激光器[J]. 光学学报, 2019, 39(12): 1214002. Yulong Cui, Zhiyue Zhou, Wei Huang, Zhixian Li, Zefeng Wang. Anti-Resonant Hollow-Core Fibers Based 4.3-μm Carbon Dioxide Lasers[J]. Acta Optica Sinica, 2019, 39(12): 1214002.