发光学报, 2015, 36 (2): 225, 网络出版: 2015-02-15
石英光子晶体光纤中高功率中红外超连续谱的产生
High Power Mid-infrared Supercontinuum Generation in Silica Photonic Crystal Fiber
非线性光学 中红外 超连续谱 石英光子晶体光纤 nonlinear optics mid-infrared supercontinuum spectrum silica photonic crystal fiber
摘要
非石英光纤在产生大功率超连续谱方面存在难以克服的局限性。本文首次报道了采用石英光纤产生大功率中红外超连续谱。精心设计光纤结构使色散有利于超连续谱向中红外波段展宽, 同时保证相对较大的芯径以承受较高的泵浦功率。合理选择光纤长度, 在保证光谱展宽到3.4 μm的情况下使光纤损耗的影响降低到最小限度。研究表明, 在1.95 μm皮秒脉冲泵浦下, 采用色散适宜的石英光子晶体光纤可以产生20 dB带宽覆盖1 550~3 420 nm的超连续谱。超连续谱的平均功率可达56.6 W。
Abstract
Non-silica fibers have the intrinsic limitations in high power supercontinuum generation. High power mid-infrared supercontinuum generation in silica photonic crystal fiber is firstly investigated in our studies. The dispersion of fiber is designed to be beneficial to supercontinuum broadening to mid-infrared region. Meanwhile, to withstand high pumping power, a relatively large core diameter is essential. On the premise of supercontinuum broadening to 3.4 μm, fiber length is optimized to reduce the loss of the optical fibers. The results show that it is feasible to generate supercontinuum spectrum with 20 dB-bandwidth covering from 1 550 nm to 3 420 nm by injecting 1.95 μm picosecond pulse into silica photonic crystal fiber with appropriate dispersion. The average power of the supercontinuum spectrum can reach 56.6 W.
高娟娟, 李夏, 高松, 薛天峰, 胡丽丽, 高伟清, 廖梅松. 石英光子晶体光纤中高功率中红外超连续谱的产生[J]. 发光学报, 2015, 36(2): 225. GAO Juan-juan, LI Xia, GAO Song, XUE Tian-feng, HU Li-li, GAO Wei-qing, LIAO Mei-song. High Power Mid-infrared Supercontinuum Generation in Silica Photonic Crystal Fiber[J]. Chinese Journal of Luminescence, 2015, 36(2): 225.