Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1997-04-17
2000-05-09
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
257656, 257 14, H01L 2714
Patent
active
060607041
ABSTRACT:
For a multiple transmission communication system, how to individually isolate the transmitted lights and then to distribute to the terminals has been primary concerns to be solved. In the photodetector structure, an absorption layer may be configured as either multiple quantum well structures corresponding to operational wavelengths, or filter-based structure, allowing to select wavelengths in a 1:2:4:8 ratio as an absorptance for each wavelength. In case of using such four-fold lights, the determination as to which wavelength among four-fold wavelengths can be made based upon the total amounts of the current flow in such a photodetector. The photodetector employing such schemes is provided from the present invention.
REFERENCES:
patent: 4323911 (1982-04-01), Campbell et al.
patent: 4544938 (1985-10-01), Scholl
patent: 4935935 (1990-06-01), Reed et al.
patent: 5144397 (1992-09-01), Tokuda et al.
patent: 5198659 (1993-03-01), Smith et al.
patent: 5216237 (1993-06-01), Ritchie et al.
patent: 5329136 (1994-07-01), Goossen
Goossen, K.W., et al. Voltage-tunable multiple quantum well photodetector vertically integrated with voltage-tunable multiple quantum well filter, Appl. Phys. Lett, vol. 62, No. 25, pp. 3229-3231, Jun. 21, 1993.
Soole, J.B.D., et al. Polarisation-independent monolithic eight-channel 2 nm spacing WDM detector based on compact arrayed waveguide demultiplexer, Electronics Letters, vol. 31, pp. 1289-1291, Jul. 20, 1995.
Alferness, R.C., et al. Tunable optical waveguide directional coupler filter, Appl. Phys. Lett., vol. 33, No. 2, pp. 161-163, Jul. 15, 1978.
Nabiev, R.F., et al. Spectrodetector: novel monolithic wavelength reader and photodetector, Electronics Letters, vol. 31, No. 16, pp. 1373-1374, Aug. 3, 1995.
Hyun Kyung-Sook
Kim Kwang-Joon
Kwon O-Kyun
Lee El-Hang
Electronics and Telecommunications Research Institute
Luu Thanh X.
Westin Edward P.
LandOfFree
Photodetector for simultaneous recognition of multiple wavelengt does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photodetector for simultaneous recognition of multiple wavelengt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photodetector for simultaneous recognition of multiple wavelengt will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1067201