摘要
报道了一种基于微结构光纤的宽带、平坦超连续谱(SC)光源。利用锁模半导体激光器产生的1.6ps,重复率为10GHz的光脉冲,通过一段80m的色散平坦高非线性微结构光纤(HNL-MF),在1.55μm波长区域产生了谱宽超过100nm的平坦超连续谱。实验中采用的微结构光纤的非线性系数约为11W-1·km-1。光纤具有小的正常色散和平坦的色散特性,在1550nm波长处,光纤的色散值约为-0.58ps·nm-1·km-1,而在1500～1650nm波长范围内,光纤的色散值变化小于1.5ps·nm-1·km-1。实验中获得的宽带、平坦超连续谱在1503～1593nm宽达90nm的波长范围内,具有±2.5dB的平坦度。该宽带、平坦超连续谱能同时提供波长间隔为10GHz,超过1100路的多波长载波信道。通过对光谱滤波,获得了速率为10Gbit/s的多波长脉冲序列。这样的超连续谱光源在波分复用(WDM)光通信系统、光波长变换等方面都有重要的应用。
The generation of a flat supercontinuum （SC） spectrum of over 100 nm in the 1.55 μm region by injecting 1, 6 ps, 10-GHz repetition rate optical pulses into an 80-m-long dispersion-flattened highly nonlinear microstructure fiber （HNL-MF） is demonstrated. The experimental microstructure fiber with a nonlinearity of -11 W ^-1 · km^-1 has small normal dispersion and is characterized by flattened chromatic dispersion. The chromatic dispersion is about -0.58 ps· nm^-1·km^-1 at 1550 nm, and it varies less than 1.5 ps· nm^-1· km^-1 between 1500 and 1650 nm. The generated flat broadband supercontinuum ranging from 1503 to 1593 nm has the flatness of ±2.5 dB. This flat broadband supercontinuum can simultaneously supply more than 1100 multi-wavelength channels with 10-GHz spacing. The multi-wavelength pulse trains at 10 Gbit/s based on spectral slicing are also demonstrated. Such supercontinuum source has important applications, such as wavelength division multiplexing optical communication system and optical wavelength convertor.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2007年第5期675-679,共5页
Chinese Journal of Lasers
基金
国家973计划(2003CB314906)
教育部科学技术研究重大项目基金(104046)
北京市教育委员会共建项目XK100130437)资助课题
关键词
光通信
微结构光纤
超连续谱
自相位调制
optical communication
microstructure fiber
supercontinuum
self-phase modulation
