Ridge guide distributed feedback laser and method of making...

Details Ridge guide distributed feedback laser and method of making... Ridge guide distributed feedback laser and method of making...

H - Electricity

01

S

345/32

H01S 3/085 (1990.01)

Patent

CA 1290434

RIDGE GUIDE DISTRIBUTED FEEDBACK LASER AND METHOD OF MAKING SAME ABSTRACT OF THE DISCLOSURE A distributed feedback laser which generates light of a specific wavelength comprises a body of semiconductor material having a cavity region positioned between first and second cladding layers of opposite conductivity. The cavity region is a ridge which extends in the longitudinal direction. The cavity region periodically varies in thickness in the longitudinal direction which is in the form of corrugations in a major surface thereof. The second cladding layer overlies the cavity region and the first cladding layer. This laser is fabricated by forming a first cladding layer overlying a substrate. A cavity layer is then formed, over the first cladding layer and corrugations are formed in a major surface of the cavity layer. Portions of the cavity layer are then removed to form the cavity region and the second cladding layer is then formed over the cavity region and the first cladding layer.

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