Patents Represented by Attorney D. D. Dubosky

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  • Crenelated-ridge waveguide laser
    Patent number: 4400813
    Abstract: The ridge-structure in a ridge waveguide laser is notched at periodic intervals to produce a longitudinally crenelated ridge, and the electrode on the ridge side of the laser is alloyed only to the topmost surfaces of the ridge. As a result, the active region of the laser is pumped only in the regions that are underneath the topmost surfaces of the ridge, and the laser is caused to prefer the longitudinal modes whose maxima coincide with the spatial Fourier components of the pumped regions.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: August 23, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Ivan P. Kaminow