纳秒脉冲泵浦光子晶体光纤产生超连续谱  

Supercontinuum generation in a photonic crystal fiber pumped by nanosecond pulses

作　　者：房鸿[1] 马瑞龙[1,2] 成建群[2] 胡学娟[2] 郭春雨[2] 

机构地区：[1]西安工业大学理学院,西安710032 [2]深圳大学激光工程重点实验室,深圳518060

出　　处：《深圳大学学报（理工版）》2011年第6期523-528,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：广东省自然科学基金资助项目(31809)~~

摘　　要：采用纳秒激光器作为泵浦源,在光子晶体光纤中实现宽带超连续谱输出,并研究泵浦脉冲重复频率对超连续谱产生的影响.在重复频率150 kHz、峰值功率256 W时,利用25 m长光子晶体光纤实现输出功率为0.76 W、光谱范围超过1 200 nm的超连续谱输出.利用该激光器的重复频率可调性,选取重复频率50 kHz和100 kHz的泵浦脉冲,对平均功率相同、重复频率不同的3组泵浦条件所形成超连续谱进行对比,发现在平均功率相同时,重复频率越低的泵浦脉冲获得的超连续谱宽度越宽.The wideband supercontinuum was achieved in a photonic crystal fiber by a nanosecond pulsed laser.The influence of repetition rates of pump laser on the supercontnuum generation was studied.A 25-m-long photonic crystal fiber was pumped at the average peak power of 256 W and at the repetition rate of 150 kHz.It put out supercontinuum with 0.76 W power and the spectral range of over 1 200 nm.According to the tunability of the repetition rate of this laser,the output supercontinua pumped at the same pump average power but different repetition rates of 50 kHz and 100 kHz were analysed.Finally,it was found out that under the same pump average power,lower repetition rates of the pump would bring wider spectral ranges of the supercontinua.

关 键 词：光电子与激光技术 超连续谱 光子晶体光纤 调制不稳定性 纳秒脉冲 

分 类 号：TN248[电子电信—物理电子学]