Title :
Spectral characteristics of vertical-cavity surface-emitting lasers with strong external optical feedback
Author :
Jiang, Shijun ; Dagenais, Mario ; Morgan, Robert A.
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
fDate :
7/1/1995 12:00:00 AM
Abstract :
We study the spectral optical properties of vertical-cavity surface-emitting lasers (VCSEL´s) in the presence of strong optical feedback from an external reflecting surface. When the feedback strength exceeds 1%, multicompound-cavity-longitudinal-modes are observed. The output spectral width increases significantly as the feedback increases. Besides the normal compound-cavity modes, high-loss compound-cavity modes are also observed for the first time. The experimental observations are well explained by a compound-cavity laser theory.<>
Keywords :
laser cavity resonators; laser feedback; laser modes; laser theory; optical losses; semiconductor lasers; spectral line breadth; surface emitting lasers; GaAs-AlGaAs; GaAs-AlGaAs VCSEL; VCSEL; external reflecting surface; feedback strength; high-loss compound-cavity modes; multicompound-cavity-longitudinal-modes; normal compound-cavity modes; output spectral width; spectral characteristics; spectral optical properties; strong external optical feedback; vertical-cavity surface-emitting lasers; Laser feedback; Laser modes; Laser theory; Optical attenuators; Optical feedback; Optical interferometry; Output feedback; Semiconductor lasers; Surface emitting lasers; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
