Analysis of ridge-waveguide distributed feedback lasers
An analysis concerning the coupling efficiency and the threshold current density is presented for a ridge-waveguide distributed feedback laser. Particular attention is paid to the grating efficiency that is different under and beyond the ridge region because of different lateral environments and generally different corrugation depths. The threshold current density and its optimization are discussed for 1.55 ..mu..m InGaAsP lasers after considering the design parameters, such as the ridge width and the layer thicknesses. Both the TE and TM modes are considered. A narrow ridge helps to reduce the device threshold if the grating under the ridge is absent or is partially washed out during the ridgeovergrowth procedure.
- Research Organization:
- ATandT Bell Laboratories, Murray Hill, NJ
- OSTI ID:
- 6080646
- Journal Information:
- IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. QE-21:6; ISSN IEJQA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
ARSENIC COMPOUNDS
ARSENIDES
COUPLING
CURRENT DENSITY
EFFICIENCY
FEEDBACK
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
GALLIUM PHOSPHIDES
GRATINGS
INDIUM ARSENIDES
INDIUM COMPOUNDS
INDIUM PHOSPHIDES
LASERS
OPTICAL MODES
OSCILLATION MODES
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PNICTIDES
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
WAVEGUIDES