中国激光, 2011, 38 (7): 0705003, 网络出版: 2011-06-14
纳秒脉冲在普通单模光纤中产生超连续谱的实验研究
Experimental Research on Supercontinuum Generation from Nanosecond Pulse and Conventional Single Mode Fiber
非线性光学 纳秒脉冲 普通单模光纤 超连续谱 nonlinear optics nanosecond pulse conventional single mode fiber supercontinuum
摘要
利用中心波长1064 nm的纳秒激光脉冲入射到普通单模光纤中,获得了从700 nm到超过1750 nm的超连续谱输出。在正常色散区抽运下,光谱首先出现多级拉曼斯托克斯线,随着抽运功率或光纤长度的增加,斯托克斯能量将进入光纤反常色散区,形成光孤子,随后与孤子相关的非线性效应将使光谱进一步展宽。实验结果表明,当单模光纤长度为28 m时,产生的光谱在1260~1750 nm范围内,有较好的光谱平坦度(小于3.8 dB)、较强的光谱光功率密度(平均约为0.4 mW/nm)并且单模输出。
Abstract
1064 nm nanosecond pump pulses and conventional single mode fibers are adopted to generate supercontinuum whose spectrum covers from 700 nm to above 1750 nm. In the fiber′s normal dispersion regime, the spectrum initially shows multi Raman Stokes lines. As pump power or fiber length increases, Stokes energies enter into anomalous dispersion regime and form optical solitons, which make the following spectral broadening to be dominated by soliton-related nonlinear effects. We show experimentally that the supercontinuum generates with 28 m fiber length has flat spectral structure (in less than 3 dB flatness), high spectral density (0.4 mW/nm in average) and single mode output in 1260 nm to 1750 nm regime.
刘楚, , , 简水生, . 纳秒脉冲在普通单模光纤中产生超连续谱的实验研究[J]. 中国激光, 2011, 38(7): 0705003. Liu Chu, Eric Rees, Toni Laurila, Jian Shuisheng, Clemens Kaminski. Experimental Research on Supercontinuum Generation from Nanosecond Pulse and Conventional Single Mode Fiber[J]. Chinese Journal of Lasers, 2011, 38(7): 0705003.