G - Physics – 02 – B
Patent
G - Physics
02
B
88/97.5
G02B 6/12 (2006.01) G02B 6/42 (2006.01) G02F 1/03 (2006.01) H01L 31/103 (2006.01) H01S 5/10 (2006.01) H01S 5/04 (2006.01) H01S 5/12 (2006.01)
Patent
CA 1299410
Abstract A grating in the upper reflecting layer of an antiresonant reflecting optical waveguide is used to extract energy of a selected wavelength from the waveguiding layer into the reflecting layer. In one embodiment the reflecting layer is designed as a gain medium which is pumped in the region of a grating and optically terminated at each end of the device such that the embodiment serves as a laser having a long cavity provided by the waveguiding layer with the gain provided in the short grating region. In a second embodiment the reflecting layer in the region of a grating has an opposite conductivity dopant from that of the waveguiding layer such that the device in this region may be backbiased to serve as a wavelength selective photodetector. By placing two wavelength photodetectors in tandem with gratings of different pitches a wavelength demultiplexing photodetector is provided.
548875
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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