摘要
研究了纳秒脉冲在光子晶体光纤中的演化和传输.利用纳秒激光器产生脉宽为65ns、重复频率为150kHz光脉冲,泵浦25m的光子晶体光纤,获得了输出功率为0.76W、整个光谱范围超过1200nm的超连续谱.在光谱展宽的初始阶段,光谱的展宽来源于调制不稳定性效应.随着泵浦功率的增加,发现四波混频效应对光谱短波部分的展宽起作用,受激拉曼散射效应对光谱长波部分的展宽起作用.
The transmission and evolvement of nano-second laser pulse in photonic crystal fiber are investigated. A 25 m PCF is pumped by 65 ns and 150 kHz optical pulses from nanosecond laser, super-continuum with spectral width of beyond 1200 nm and average output power of 750 mW is obtained. In the initial stage, the SC generation is originated from modulation instability effect. With increasing pump power, the SC extends to the long wavelengths due to the stimulated Raman scattering, but to the short wavelengths due to the four wave mixing.
出处
《西安工业大学学报》
CAS
2012年第12期975-979,共5页
Journal of Xi’an Technological University
关键词
超连续谱
光子晶体光纤
调制不稳定性效应
四波混频
受激拉曼散射
super-continuum
photonic crystal fiber
modulation instability
four wave mixing
stimulated Raman scattering
