Title :
1.55-μm narrow-linewidth and high-power distributed feedback lasers for coherent transmission systems
Author :
Sato, Kenji ; Kondo, Yasuhiro ; Nakao, Masashi ; Fukuda, Mitsuo
Author_Institution :
NTT Optoelectron. Labs., Kanagawa, Japan
fDate :
10/1/1989 12:00:00 AM
Abstract :
Stable operation of 1.55-μm distributed feedback lasers with a narrow linewidth and high power is demonstrated for coherent transmission systems. Narrow linewidth and high power were realized by improving the geometrical uniformity of the active region and thinning the active layer by using MOVPE and a dry-etching technique. A narrow linewidth of 1 MHz was achieved at a high power of 20 mW for a distributed feedback laser with a thin active layer of 0.07 μm and a long cavity of 1.2 mm
Keywords :
distributed feedback lasers; etching; laser cavity resonators; laser transitions; optical communication equipment; semiconductor junction lasers; vapour phase epitaxial growth; 0.07 micron; 1.2 mm; 1.55 micron; 20 mW; MOVPE; active layer thinning; active region geometrical uniformity; coherent transmission systems; dry-etching technique; high-power distributed feedback lasers; long laser cavity; narrow-linewidth DFBL; semiconductor lasers; Distributed feedback devices; Gratings; Laser feedback; Optical feedback; Optical films; Optical receivers; Optical refraction; Optical sensors; Optical variables control; Power lasers;
Journal_Title :
Lightwave Technology, Journal of
