Highly efficient Cherenkov radiation generation in the irregular point of hollow-core photonic crystal fiber  

作　　者：申向伟 苑金辉 桑新柱 余重秀 饶兰 夏民 韩颖 夏长明 侯蓝田 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts&Telecommunications [2]Institute of Infrared Optical Fibers&Sensors

出　　处：《Chinese Physics B》2012年第11期222-226,共5页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China (Grant Nos. 2010CB327605 and 2010CB328300);the Fundamental Research Funds for the Central Universities,China (Grant Nos. 2011RC0309 and 2011RC008);the Specialized Research Fund for the Doctoral Program of Beijing University of Posts and Telecommunications,China (Grant No. CX201023)

摘　　要：Highly efficient Cherenkov radiation （CR） is generated by the soliton self-frequency shift （SSFS） in the irregular point of a hollow-core photonic crystal fiber （HC-PCF） in our laboratory. The impacts of pump power and wavelength on the CR are investigated, and the corresponding nonlinear processes are discussed. When the average power of the 120 fs pump pulse increases from 500 mW to 700 mW, the Raman soliton shifts from 2210 nm to 2360 nm, the output power of the CR increases by 2.3 times, the maximum output power ratio of the CR at 539 nm to that of the residual pump is calculated to be 24.32：1, the width of the output optical spectrum at the visible wavelength broadens from 35 nm to 62 nm, and the conversion efficiency η of the CR in the experiment can be above 32%.Highly efficient Cherenkov radiation （CR） is generated by the soliton self-frequency shift （SSFS） in the irregular point of a hollow-core photonic crystal fiber （HC-PCF） in our laboratory. The impacts of pump power and wavelength on the CR are investigated, and the corresponding nonlinear processes are discussed. When the average power of the 120 fs pump pulse increases from 500 mW to 700 mW, the Raman soliton shifts from 2210 nm to 2360 nm, the output power of the CR increases by 2.3 times, the maximum output power ratio of the CR at 539 nm to that of the residual pump is calculated to be 24.32：1, the width of the output optical spectrum at the visible wavelength broadens from 35 nm to 62 nm, and the conversion efficiency η of the CR in the experiment can be above 32%.

关 键 词：Cherenkov radiution hollow-core photonic crystal fiber soliton self-frequency shift 

分 类 号：TN253[电子电信—物理电子学] TL53[核科学技术—核技术及应用]