Title :
Strained multiquantum-well corrugation-pitch-modulated distributed feedback laser with ultranarrow (3.6 kHz) spectral linewidth
Author :
Okai, M. ; Suzuki, M. ; Taniwatari, T.
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
Abstract :
Introducing a 1% compressive strained multiquantum-well (MQW) active layer into a corrugation-pitch-modulated distributed feedback (CPM-DFB) laser reduces the linewidth floor (residual linewidth for extrapolated infinite output power) to 2 kHz and results in a linewidth-power product of 140 kHz. mW. Strained MQW CPM-DFB lasers produced a 55 mW output with a spectral linewidth of only 3.6 kHz.
Keywords :
distributed feedback lasers; semiconductor lasers; spectral line breadth; 55 mW; DFB laser; InGaAsP-InGaAs-InP; MQW active layer; compressive strained multiquantum-well; distributed feedback laser; spectral linewidth;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19931128
