Title :
Influence of external optical feedback on threshold and spectral characteristics of vertical-cavity surface-emitting lasers
Author :
Jiang, Shijun ; Pan, Zeqi ; Dagenais, Mario ; Morgan, Robert A. ; Kojima, Keisuke
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
Abstract :
We report a study of the effects of external optical feedback on the threshold and spectral characteristics of VCSELs with feedback levels in the range from /spl minus/25 dB to 0 dB. A large threshold current reduction and multi-extended-cavity-mode operation have been observed. The experimental results are in good agreement with the theoretical calculations based on a compound cavity laser model.<>
Keywords :
laser cavity resonators; laser theory; semiconductor lasers; 835 nm; GaAs-AlGaAs; compound cavity laser model; external optical feedback; feedback levels; multi-extended-cavity-mode operation; spectral characteristics; threshold; threshold current reduction; vertical-cavity surface-emitting lasers; Laser feedback; Laser modes; Laser theory; Optical attenuators; Optical feedback; Optical surface waves; Semiconductor laser arrays; Surface emitting lasers; Threshold current; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
