Low-Threshold Broadband Spectrum Generation by Amplification of Cascaded Stimulated Raman Scattering in an Ytterbium-Doped Fiber Amplifier
LEI Cheng-Min, SONG Rui** , JIN Ai-Jun, HOU Jing
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073
Abstract ：We present an experimental study on low-threshold broadband spectrum generation mainly due to the amplification of the cascaded stimulated Raman scattering (SRS) effect in a four-stage fiber master oscillator power amplifier system. The cascaded SRS is achieved by using a long passive fiber pumped by a pulsed fiber laser centered at wavelength 1064 nm. The amplified spontaneous emission during the amplification process is efficiently suppressed by cutting the length of the passive fiber and by using a double-clad ytterbium-doped fiber amplifier. The generated broadband spectrum spans from 960 nm to 1700 nm with maximum average output 13.6 W and average spectral power density approximately 17.7 mW/nm.
收稿日期: 2015-03-23
出版日期: 2015-07-30
:
42.65.Dr
(Stimulated Raman scattering; CARS)
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2015, Vol. 32 
