Title :
Corrugation-pitch-modulated MQW-DFB laser with narrow spectral linewidth (170 kHz)
Author :
Okai, M. ; Tsuchiya, T. ; Uomi, K. ; Chinone, N. ; Harada, T.
Author_Institution :
Hitachi Ltd., Tokyo, Japan
Abstract :
A spectral linewidth of 170 kHz was achieved at a 1.5- mu m wavelength in a 1200- mu m long corrugation-pitch-modulated (CPM) distributed feedback (DFB) laser having multiple quantum wells (MQW). This is the narrowest linewidth ever reported for InGaAsP DFB lasers. The CPM structure is effective in maintaining the single longitudinal mode at a high output power by suppressing the spatial hole burning effect. The linewidth-power product is 400 kHz-mW, and the extrapolated residual spectral linewidth is 150 kHz.<>
Keywords :
III-V semiconductors; distributed feedback lasers; gallium arsenide; indium compounds; laser modes; semiconductor junction lasers; spectral line breadth; 1.5 micron; 1200 micron; InGaAsP; MQW-DFB laser; corrugation-pitch-modulated; distributed feedback; high output power; linewidth-power product; multiple quantum wells; narrow spectral linewidth; residual spectral linewidth; single longitudinal mode; spatial hole burning effect; suppressed spatial hole burning; Distributed feedback devices; Gratings; Indium gallium arsenide; Laser feedback; Laser modes; Power generation; Power lasers; Quantum well devices; Quantum well lasers; Reflectivity;
Journal_Title :
Photonics Technology Letters, IEEE
