Transverse Writing of Multimode Interference Waveguides inside Silica Glass by Femtosecond Laser Pulses  

作　　者：刘大勇 李焱 窦艳萍 郭亨长 杨宏 龚旗煌 

机构地区：[1]State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871

出　　处：《Chinese Physics Letters》2008年第7期2500-2503,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10434020, 60578017, and 10521002, the National Basic Research Programme of China under Grant Nos 2006CB921601 and 2006CB806007, and the New Century Excellent Talent Project （NCET） of the Ministry of Education of China.

摘　　要：Multi-mode interference waveguides are fabricated inside silica glass by transverse writing geometry with femtosecond laser pulses. The influences of several writing and reading factors on the output mode are systematically studied. The experimental results of straight waveguides are in good agreement with the simulations by the beam propagation method. By integrating a straight waveguide with a bent waveguide, a 1× 2 multi-mode splitter is formed and 2×3 lobes are observed in the output mode.Multi-mode interference waveguides are fabricated inside silica glass by transverse writing geometry with femtosecond laser pulses. The influences of several writing and reading factors on the output mode are systematically studied. The experimental results of straight waveguides are in good agreement with the simulations by the beam propagation method. By integrating a straight waveguide with a bent waveguide, a 1× 2 multi-mode splitter is formed and 2×3 lobes are observed in the output mode.

关 键 词：the power-law exponents precipitation durative abrupt precipitation change 

分 类 号：TN24[电子电信—物理电子学]