Title :
High-power low-divergence semiconductor lasers for GaAs-based 980-nm and InP-based 1550-nm applications
Author :
Jeon, Heonsu ; Verdiell, Jean-Marc ; Ziari, Mehrdad ; Mathur, Atul
Author_Institution :
SDL Inc., San Jose, CA, USA
fDate :
12/1/1998 12:00:00 AM
Abstract :
High-power diode lasers with low-vertical divergence and high-fiber coupling efficiency were developed for GaAs-based 980-nm pump lasers and InP-based 1550-nm Fabry-Perot and distributed-feedback (DFB) lasers. Narrow divergence at 980 nm was made possible by a large optical-mode waveguide design, with full-width at half-maximum (FWHM) far-field angles of 11.7°×17.8° and coupling efficiency of 80% into a cleaved single-mode fiber (SMF). A vertical taper processing technique was developed for InP-based laser structures. Fabry-Perot lasers produced over 90-mW output power, 17°×16° FWHM beam divergence angles, and 63% coupling efficiency into a lensed SMF. The vertical taper was successfully integrated in 1550-nm DFB lasers, and over 80 mW single-mode output power with beam divergence angles of 12°×14° was obtained
Keywords :
distributed feedback lasers; laser beams; laser modes; laser transitions; optical transmitters; semiconductor lasers; 1550 nm; 1550-nm applications; 80 percent; DFB lasers; Fabry-Perot lasers; GaAs-based 980-nm pump lasers; InP-based 1550-nm Fabry-Perot lasers; InP-based laser structures; beam divergence angles; cleaved single-mode fiber; coupling efficiency; far-field angles; full-width at half-maximum; high-fiber coupling efficiency; high-power diode lasers; high-power low-divergence semiconductor lasers; large optical-mode waveguide design; low-vertical divergence; narrow divergence; single-mode output power; vertical taper processing technique; Fabry-Perot; Fiber lasers; Laser beams; Optical coupling; Optical waveguides; Power generation; Power lasers; Pump lasers; Semiconductor lasers; Waveguide lasers;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.658788
