Title :
Ultralow chirp and high-speed 1.55 mu m multiquantum well lambda /4-shifted DFB lasers
Author :
Uomi, K. ; Sasaki, S. ; Tsuchiya, T. ; Nakano, H. ; Chinone, N.
Author_Institution :
Hitachi Ltd., Tokyo, Japan
fDate :
4/1/1990 12:00:00 AM
Abstract :
An ultra-low-chirp, high-speed, 1.55- mu m, multi-quantum-well (MQW), lambda /4-shifted, InGaAsP distributed-feedback (DFB) laser is demonstrated. A record chirp width of 0.4-0.5 nm (20-dB down full width) is achieved at 10-Gb/s direct modulation. This low-chirp single-longitudinal-mode operation is attained by an increase in the quantum size effect in the MQW active layer.<>
Keywords :
III-V semiconductors; distributed feedback lasers; gallium arsenide; gallium compounds; high-speed optical techniques; indium compounds; laser modes; optical modulation; semiconductor junction lasers; semiconductor quantum wells; 1.55 micron; 10 Gbit/s; InGaAsP; MQW; MQW active layer; chirp width; direct modulation; distributed-feedback; down full width; high-speed; lambda /4-shifted DFB lasers; multiquantum well; quantum size effect; single-longitudinal-mode operation; ultra-low-chirp; Chirp modulation; Electrons; Erbium; Fiber lasers; Indium gallium arsenide; Indium phosphide; Laser theory; Optical fiber communication; Quantum well devices; Quantum well lasers;
Journal_Title :
Photonics Technology Letters, IEEE
