摘要
报道了采用被动锁模光纤激光器抽运特种光纤产生超连续(SC)谱,对在4.28km色散平坦光纤(DFF),4.28kmDFF+420m高非线性光纤(HNLF)和420mHNLF+4.28kmDFF中产生的超连续谱进行比较和分析。平均抽运功率为30mW时,在420mHNLF+4.28kmDFF组合中,实现了长波长一侧的光谱234nm范围内不平坦度小于±2dB,短波长一侧的光谱195nm范围内不平坦度小于±2dB。结果表明DFF与HNLF的组合使用要比单独使用DFF获得的超连续谱谱宽更宽,平坦性更好;DFF与HNLF的连接顺序不同,所产生的超连续谱也不同;420mHNLF+4.28kmDFF这种组合更容易获得平坦的超连续谱,短波长一侧的功率显著增高。
Passively mode-locked fiber laser was used as the pump source to generate super continuum （SC） spectrum. SC spectrum generated in 4.28 km dispersion-flattened fiber （DFF）, 4.28 km DFF ＋420 m high non-linear fiber （HNLF） and 420 m HNLF ＋4.28 km DFF were compared and analyzed. By using 420 m HNLF and 4.28 km DFF, the uniformity less than ＋2 dB spectrum was obtained in an area covering 195 nm on the short wavelength side while the uniformity less than _＋2 dB was achieved in an area covering 234 nm on the long wavelength side with 30 mW average pump power. It showed that the spectrum was wider and flatter by using the combination of DFF and HNLF as the fiber generating SO than only using DFF. The SC generated in the combination fiber which included DFF and HNLF with different connecting sequence was different. The combination of 420 m HNLF and 4.28 km DFF was much easier to get flatter SC spectrum, and the power of short-wavelength spectrum was larger than others.
出处
《激光与光电子学进展》
CSCD
北大核心
2009年第9期64-67,共4页
Laser & Optoelectronics Progress
基金
天津市培育资助项目(06YFGPGX08500)
天津市应用基础及前沿技术研究计划(08JCYBJC10100)
国家自然科学基金(60507001)资助项目
关键词
超连续
被动锁模
色散平坦光纤
高非线性光纤
super continuum
passive mode-locking
dispersion-flattened fiber
highly non-linear fiber
