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Investigation of linewidth and side-mode suppression for a DBR laser with integrated passive waveguide

: Meissner, P.; Patzak, E.

Electronics Letters 22 (1986), Nr.6, S.340-1
ISSN: 0013-5194
Fraunhofer HHI ()
distributed bragg reflector lasers; integrated optics; laser modes; laser theory; optical communication equipment; optical waveguides; semiconductor junction lasers; spectral line breadth; distributed bragg reflector type; linewidth; side-mode suppression; integrated passive waveguide; semiconductor laser; dbr grating; 2 mm-long device

A semiconductor laser device consisting of an active part monolithically integrated with a passive waveguide and a DBR grating is theoretically investigated. It is shown that for a 2 mm-long device a linewidth below 4 MHz can be achieved. The linewidth does not exceed this value even if the lasing frequency is tuned by several gigahertz. The side-mode suppression remains larger than 30 dB.