Title :
Design of widely tunable semiconductor lasers using grating-assisted codirectional-coupler filters
Author :
Chuang, Zuon-Min ; Coldren, Larry A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
The analysis and design of widely tunable semiconductor lasers using grating-assisted codirectional-coupler filtering in a vertical twin-guide structure are considered. An orthogonal coupled mode formalism is applied to obtain the important design parameters for the filter. It is shown that there is a tradeoff between tuning range and spectral purity when using this type of filter as an intracavity mode selector. Practical laser structures are presented, and design considerations and limitations are discussed for GaAs and InP material systems with lasing wavelengths around 0.98 and 1.55 μm, respectively
Keywords :
diffraction gratings; laser accessories; optical couplers; optical filters; semiconductor lasers; 0.98 micron; 1.55 micron; GaAs; InP material systems; analysis; design; grating-assisted codirectional-coupler filters; intracavity mode selector; lasing wavelengths; orthogonal coupled mode formalism; spectral purity; tuning range; vertical twin-guide structure; widely tunable semiconductor lasers; Filtering; Filters; Gallium arsenide; Gratings; Indium phosphide; Laser modes; Laser tuning; Optical design; Semiconductor lasers; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
