1980-03-07
1982-04-06
Edlow, Martin H.
357 16, 357 17, H01L 2714, H01L 29161
Patent
active
043239110
ABSTRACT:
A 3-terminal totally integrated demultiplexing photodiode is disclosed wherein information present simultaneously at two wavelengths can be developed into two separate currents available at the three terminals. Two quaternary n-type layers (103 and 105) of indium gallium arsenide phosphide having unequal bandgaps and each having a pn junction are separated by a layer (104) of n-type indium phosphide. The device is oriented so as to present the incoming radiation first to the quaternary layer having the larger bandgap and then to the quaternary layer having the lower bandgap. One of the contacts (111) is attached to the top layer (106) of n-type indium phosphide, a second contact (112) is attached to a central p-type region (110) established in the top layer of indium phosphide and penetrating through the top quaternary layer, and the third contact (113 or 302) is connected either to the indium phosphide substrate (101) or to a p-type outer region (301) that surrounds all of the layers. By reversing the dc potential applied to the junctions in the quaternary layers, a dual-wavelength light emitting diode is provided.
REFERENCES:
patent: 2949498 (1960-08-01), Jackson
patent: 3537029 (1970-10-01), Krersel
patent: 3752713 (1975-08-01), Sokuta
patent: 3821777 (1974-06-01), James
patent: 3881113 (1975-04-01), Rideout
patent: 3891993 (1975-06-01), Beneking
patent: 3982261 (1976-09-01), Antypas
patent: 3993964 (1976-11-01), Yonezu
patent: 4045749 (1977-08-01), Bronham
patent: 4047123 (1977-09-01), Kirby
Campbell Joe C.
Lee Tien P.
Bell Telephone Laboratories Incorporated
Dubosky Daniel D.
Edlow Martin H.
LandOfFree
Demultiplexing photodetectors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Demultiplexing photodetectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demultiplexing photodetectors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-595986