TY - RPRT TI - Efficient Single-Frequency Thulium Doped Fiber Laser Near 2-micrometers AU - Geng, Jihong AU - Wu, Jianfeng AU - Jiang, Shibin AU - Yu, Jirong PY - 2007 UR - https://ntrs.nasa.gov/citations/20080006596 ID - 20080006596 ER -