OPTICAL DETECTOR WITH INTEGRAL FILTER AND HAVING FABRY PEROT RESONATOR SYSTEM

摘要

PCT No. PCT/GB90/00174 Sec. 371 Date Sep. 17, 1991 Sec. 102(e) Date Sep. 17, 1991 PCT Filed Feb. 5, 1990 PCT Pub. No. WO90/09038 PCT Pub. Date Aug. 9, 1990.An optical detector such as a pin photodiode or avalanche photodiode is provided with an integral dielectric filter (8). The optical filter (8) preferably comprises a plurality of layers of silicon and silicon monoxide. If the detector is a PIN diode, the filter (8) may be provided on the underside of a substrate (1) before growth of the diode is commenced on the other side.