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US 5,206,877 AGranted
Distributed feedback laser diodes with selectively placed lossy sections
AssigneeEastman Kodak Company
InventorKeith B. Kahen
Life of this patent
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Abstract
A distributed-feedback semiconductor laser diode includes a patterned electrically conductive layer deposited on a capping layer, selectively forming a lossy section, such that electrical contact is absent for a small longitudinal section of the capping layer.
Claims8
A distributed-feedback semiconductor laser diode comprising:
- (a) a semiconductor substrate of a first conductivity type;
- (b) a lower cladding layer of such first conductivity type deposited on the semiconductor substrate;
- (c) a semiconductor active layer formed on the lower cladding layer;
- (d) a barrier layer of a second conductivity type deposited on the semiconductor active layer;
- (e) a grating layer of such second conductivity type deposited on the barrier layer;
- (f) an upper cladding layer of such second conductivity type deposited on the grating layer;
- (g) a capping layer of such second conductivity type formed on the upper cladding layer;
- (h) an electrically conductive layer formed on the substrate;
- and
- (i) a patterned electrically conductive layer deposited on the capping layer, selectively forming a lossy section, such that electrical contact is absent for a small longitudinal section of the capping layer.
7 more elements
Dependencies are inferred from the claim text.