Title :
Direct observation of Lorentzian lineshape of semiconductor laser and linewidth reduction with external grating feedback
Author :
Saito, Sakuyoshi ; Yamamoto, Yusaku
Author_Institution :
NTT, Musashino Electrical Communication Laboratory, Musashino, Japan
Abstract :
The Lorentzian lineshape of a single longitudinal mode AlGaAs semiconductor laser is directly observed by optical heterodyne detection. A remarkable reduction in the spectral linewidth to less than 50 kHz is achieved with external grating feedback. The experimental linewidth is in reasonable agreement with the theoretical value, which is obtained by finesse calculation of the active Fabry-Perot cavity.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; optical communication equipment; semiconductor junction lasers; spectral line breadth; AlGaAs; Lorentzian lineshape; active Fabry-Perot cavity; experimental linewidth; external grating feedback; optical communication equipment; optical heterodyne detection; semiconductor junction laser; semiconductor laser transmitter; single longitudinal mode;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19810229
