Octave-Spanning Supercontinuum Generation From an NALM Mode-Locked Yb-Fiber Laser System

IEEE Photonics Journal

Hong Hu¹  Song Yang²  Tingting Liu²  Qiang Hao²  Zhengru Guo²  Heping Zeng³ 

[1] Department of Pulmonary Medicine, Chinese PLA General Hospital, Beijing, China;Shanghai Key Laboratory of Modern Optical Systems and Engineering Research Center of Optical Instrument and Systems, Ministry of Education, School of Optical Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, China;State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China;

关键词: Fiber Lasers;    mode-locked laser;    ultrafast laser;    supercontinuum generation.;   

DOI  :  10.1109/JPHOT.2017.2655003

来源: DOAJ

【 摘 要 】

We demonstrate a broadband all polarization-maintaining Yb-fiber laser system that provides 137-nJ pulse at 140-fs duration. The pulses are generated in a passively mode-locked laser in which the nonlinear amplifying loop mirror acts as the mode locker, an integrated nonreciprocal device biases π/2 phase shift to reduce the mode locking threshold, and a pair of gratings are involved to force the oscillator operating in its quietest mode. Self-started mode locking is first achieved in multiple-pulse regime with 250-mW pump power, and stable single-pulse operation with 1.1-ps pulse duration, 75-pJ energy, and 29-nm spectral width are obtained subsequently when the pump power is decreased to 135 mW. Being amplified and spectral broadened, the laser pulses lead to an f_ceo signal with >30-dB signal-to-noise ratio (SNR) which is suitable for frequency comb stabilization.

【 授权许可】

Unknown