论文部分内容阅读
报道了基于空心光子晶体光纤中氢气分子振动受激拉曼散射(SRS)的单程高增益1.9μm光纤气体激光器。用一个线偏振1064nm亚纳秒脉冲微芯激光器抽运一段长6.5m、充高压氢气的低损耗负曲率空心光纤,实现了到氢气分子一级振动斯托克斯波1907nm的有效转换。气压为2.3MPa时最大能量转换效率大于27%,相应的量子转换效率大于48%,激光平均功率约为10mW,峰值功率大于2000W。为实现高功率、窄线宽、大范围调谐的紧凑型中红外光纤激光器提供了一条潜在的有效途径。
A one-way, high-gain, 1.9-μm fiber gas laser based on stimulated Raman scattering (SRS) of hydrogen molecules in hollow photonic crystal fibers is reported. A linearly polarized 1064 nm nanosecond-pulse micro-core laser was used to pump a length of 6.5 m high-loss hollow hollow fiber with low loss and negative curvature to achieve an effective 1907 nm shift of Stokes wave to a first order hydrogen molecule. When the pressure is 2.3MPa, the maximum energy conversion efficiency is more than 27%, the corresponding quantum conversion efficiency is more than 48%, the average laser power is about 10mW and the peak power is greater than 2000W. This provides a potentially effective way to achieve high power, narrow linewidth, wide range of tuned compact mid-infrared fiber lasers.