物理学报Issue(9)：143-150,8.DOI:10.7498/aps.64.094204
覆盖可见光波长的掺Er光纤飞秒光学频率梳∗
Er-fib er femtosecond optical frequency comb covering visible light
摘要
Abstract
Femtosecond optical frequency combs (FOFCs) with output wavelengths covering visible light have potential ap-plications in absolute frequency measurement of iodine-stabilized lasers and optical clock lasers. Based on optical amplification, frequency doubling and spectrum broadening, a home-made Er-fiber femtosecond optical frequency comb (Er-FOFC) with output wavelengths covering visible light is demonstrated. One path with an average power of 8 mW from Er-FOFC is used as the seed pulse for spectrum broadening to cover the visible light. This path is first amplified to 532 mW by injecting into an Er-doped femtosecond fiber amplifier with combined forward and backward pumping and then frequency doubled with a MgO:PPLN crystal with an output power of 85 mW, frequency-doubling efficiency of 32%and pulse duration of 85fs. The output power of this path can be first amplified to 532 mW through an Er-doped fem-tosecond fiber amplifier when the forward pumping and backward pumping both turn on. Then the frequency-doubling laser can be generated in a MgO: PPLN crystal. The frequency-doubling efficiency is 32% and the pulse duration is 85 fs;the frequency-doubling light is spectrally broadened from 500 to 1000 nm in a photonic crystal fiber (PCF), with an output power of 85 mW and coupling efficiency of 50%. To verify the performance of the broadened spectrum, the light from the Er-FOFC and a compact iodine-stabilized frequency-doubled Nd: YAG laser at 532 nm is beaten. A beat signal with a signal-to-noise ratio of 30 dB at 100 kHz RBW is obtained, which provides a useful tool for absolute frequency measurement of visible lasers.关键词
掺Er光纤激光器/光纤光学频率梳/光谱展宽/光学频率计量Key words
Er-doped fiber laser/fiber optical frequency comb/spectrum broadening/optical frequency metrology引用本文复制引用
刘欢,曹士英,孟飞,林百科,方占军..覆盖可见光波长的掺Er光纤飞秒光学频率梳∗[J].物理学报,2015,(9):143-150,8.基金项目
清华大学自主科研计划(批准号:20131089299),质检公益性行业科研专项(批准号:201310007),北京高等学校青年英才计划(批准号：YETP0087)和精密测试技术及仪器国家重点实验室开放基金(批准号：pil1201)资助的课题.* Project supported by the Tsinghua University Initiative Scientific Research Program, China (Grant No.20131089299), the Special Scientific Research Foundation of General Administration of Quality Supervision, Inspection and Quarantine of China (Grant No.20130007), the Beijing Higher Education Young Elite Teacher Project, China (Grant No. YETP0087), and the State Key Laboratory of Precision Measuring Technology and Instruments of China (Grant No. pil1201) （批准号:20131089299）
