Interlayer directional coupling in antiresonant reflecting optic

Details Interlayer directional coupling in antiresonant reflecting optic Interlayer directional coupling in antiresonant reflecting optic

1986-10-08

1988-05-17

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

357 30, 372 50, 372 96, 372 97, H01S 319

Patent

active

047456078

ABSTRACT:
A grating in the upper reflecting layer (103 or 203) of an antiresonant reflecting optical waveguide is used to extract energy of a selected wavelength from the waveguiding layer (102 or 202) into the reflecting layer. In one embodiment the reflecting layer (103) is designed as a gain medium which is pumped in the region of a grating (120) 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 (102) with the gain provided in the short grating region. In a second embodiment the reflecting layer (203) in the region of a grating (211) has an opposite conductivity dopant from that of the waveguiding layer (202) 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 (211 and 212)of different pitches a wavelength demultiplexing photodetector is provided.

REFERENCES:
patent: 3978426 (1976-06-01), Logan et al.
patent: 4575851 (1986-03-01), Seki et al.
"Antiresonant Reflecting Optical Waveguides in SiO.sub.2 --Si Multilayer Structures", App. Phys. Lett. 49, 7/7/86, M. A. Duguay et al., pp. 13-15.

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