Author Affiliations
Abstract
1 College of Physics and Optoelectronics, Faculty of Science, Beijing University of Technology, Beijing 100124, China
2 Institute of Automation, Chinese Academy of Sciences, Beijing 100190, China
Noise-like pulses having a pedestal of 690 fs and a spike of 59.6 fs were generated in a nonlinear Yb-doped fiber amplification system. The seed source is a mode-locked Yb-doped fiber laser by nonlinear polarization rotation, and dissipative soliton pulses were obtained in it. Then, the dissipative soliton pulses passed through a 7.6 m dispersive fiber to enhance the dispersion and nonlinearity. Further on, the dissipative soliton pulses were launched into a Yb-doped fiber nonlinear amplifier, and stable noise-like pulses with a pedestal of 6.26 ps and a spike of 227 fs were achieved. Finally, by a grating pair, the pedestal and spike of the noise-like pulses were effectively compressed to 690 fs and 59.6 fs, respectively. To the best of our knowledge, this is the shortest pedestal demonstrated in noise-like pulses operating at 1 μm.
fiber laser amplifier compression noise-like pulse Chinese Optics Letters
2020, 18(12): 121403
系统地研究了在非线性掺镱光纤放大器中产生宽带光谱的特性,对不同种子脉冲激光的中心波长、放大器增益光纤长度对光谱输出特性的影响进行系统实验及分析。实验中采用非线性偏振旋转锁模技术获得非线性放大器的种子光,输出为耗散孤子脉冲。当种子脉冲激光中心波长为1041 nm、放大器的增益光纤长度为8 m时,获得了较好的平坦宽光谱,波长范围为1040~1600 nm时,其平坦度约为10 dB,其中1040~1250 nm波长范围的宽光谱平坦度小于1.5 dB。
激光光学 放大器 锁模 受激拉曼散射 掺镱光纤 平坦宽光谱
