Title :
Narrow linewidth and wavelength tunable distributed feedback lasers
Author :
Kotaki, Y. ; Ishikawa, Hiroshi
Author_Institution :
Fujitsu Labs. Ltd., Atsugi, Japan
Abstract :
Results obtained for an experimental three-section multiple-quantum-well distributed-feedback (DFB) laser with a long cavity and a lambda /4 phase-shifted grating are reviewed. To narrow the linewidth, a 1.2-mm-long cavity, Bragg wavelength detuning of -20 nm from gain peak, and a quantum-well active layer were used. Wavelength tuning was achieved by controlling spatial hole burning using three electrodes with nonuniform current injection. The maximum wavelength tuning range was 1.6 nm, the minimum linewidth was 350 kHz, and FM response was flat from 100 kHz to 10 GHz, making the laser suitable for use in coherent optical fiber transmission systems.<>
Keywords :
distributed feedback lasers; frequency response; laser tuning; optical communication equipment; optical hole burning; semiconductor junction lasers; 1.2 mm; 100 kHz to 10 GHz; Bragg wavelength detuning; FM response; InP substrate; coherent optical fiber transmission systems; current injection; distributed feedback laser; multiple quantum well DFB laser; narrow linewidth laser; phase-shifted grating; quantum-well active layer; spatial hole burning; wavelength tunable distributed feedback lasers; Distributed feedback devices; Electrodes; Fiber lasers; Gratings; Laser feedback; Laser tuning; Optical tuning; Quantum well devices; Quantum well lasers; Tunable circuits and devices;
Conference_Titel :
Indium Phosphide and Related Materials, 1990. Second International Conference.
Conference_Location :
Denver, CO, USA
DOI :
10.1109/ICIPRM.1990.203013
