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

• 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: State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts
• 出 处: Chinese Physics B
• 发表日期: 2012年11期
• 关键词: photonic hollow soliton Highly irregular visible Bragg silica Roberts colour

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. These impacts of pump power and wavelength on the CR are investigated, and the corresponding nonlinear processes are discussed. The average power of 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%.