Tunable,ultra-narrow-band optical filter based on a whispering gallery mode hybrid-microsphere  

作　　者：万洪丹 李宏业 朱浩瀚 许吉 陆云清 王瑾 

机构地区：[1]Nanjing University of Posts and Telecommunications, Nanjing 210023, China

出　　处：《Chinese Optics Letters》2016年第11期94-97,共4页中国光学快报（英文版）

基　　金：supported by the Young Science Foundation of Jiangsu Province(No.BK20150858);the Scientific Research Foundation of Nanjing University of Posts and Telecommunications(No.NY214059);the National Natural Science Foundation of China,(No.11404170);the National Science Foundation of Jiangsu Province(No.BY2014013)

摘　　要：We demonstrate an ultra-narrow-band optical filter based on a hybrid-microsphere consisting of a coated SiO2.microsphere.As compared to the SiO2 microsphere,the hvbrid-mierosphoro produces a quality factor of 〉10^8.a transmission sport nun bandwidth of 〈1pm.and an increased side-mode suppression ratio.The microsphere surface roughness and whispering gallery mode（WGM） transmission spectra are measured experimentally.A 0.01 nm bandwidth,single-wavelength fiber laser output is achieved with a tunable wavelength,using the SiO2 microsphere as the mode selector.The optical field distribution and WGM transmission spectrum of the hybrid-microsphere with different coating parameters are theoretically investigated by the finite-difference time-domain method.We demonstrate an ultra-narrow-band optical filter based on a hybrid-microsphere consisting of a coated SiO2.microsphere.As compared to the SiO2 microsphere,the hvbrid-mierosphoro produces a quality factor of 〉10^8.a transmission sport nun bandwidth of 〈1pm.and an increased side-mode suppression ratio.The microsphere surface roughness and whispering gallery mode（WGM） transmission spectra are measured experimentally.A 0.01 nm bandwidth,single-wavelength fiber laser output is achieved with a tunable wavelength,using the SiO2 microsphere as the mode selector.The optical field distribution and WGM transmission spectrum of the hybrid-microsphere with different coating parameters are theoretically investigated by the finite-difference time-domain method.

关 键 词：Lasers  fiber MICROCAVITIES Optical resonators Resonators 

分 类 号：TN713[电子电信—电路与系统]