物理学报2012，Vol.61Issue(9)：278-285,8.
高相干度超连续谱产生的理论研究
Theoretical research on the generation of coherent supercontinuum
摘要
Abstract
The degree of coherence of the supercontinuum（SC） directly determine the resolution and the precision in many optical apparatus, so how to achieve highly coherent SC is one of the focuses in nonlinear optics. It is shown that modulation instability （MI） is the key element that influences the coherence of SC. Therefore an effective way of achieving coherent SC is to avoid MI and to use other nonlinear effects such as self-phase modulation （SPM）. We design a kind of photonic crystal fiber （PCF） which has an all-normal group velocity dispersion （GVD） profile. After numerical investigation on the generation of SC in the PCF we obtain the degrees of the SC in different lengths. Results indicate that for the generated SC by pumping 50 cm of this PCF with TFWHM = 400 fs unchirped pulse Gaussian pulse can realize high coherence in the entire broadening area on condition that relative power is larger than -80 dB.关键词
全波段正常色散/光子晶体光纤/超连续谱/相干度Key words
all-normal group velocity dispersion/photonic crystal fiber/supercontinuum/degree of coherence分类
数理科学引用本文复制引用
李荧,侯静,王彦斌,靳爱军,姜宗福..高相干度超连续谱产生的理论研究[J].物理学报,2012,61(9):278-285,8.基金项目
国家自然科学基金（批准号：61077076）和教育部新世纪优秀人才支持计划（批准号：NCET-08-0142）资助的课题. （）
