1979-07-19
1981-10-27
Edlow, Martin H.
357 16, H01L 2714, H01L 29161
Patent
active
042977207
ABSTRACT:
The present invention provides monolithic-structure type photodiodes in which the first photodiode is sensitive to an optical signal having one wavelength and the second photodiode is sensitive to another optical signal having a different wavelength, and in which the first and second photodiodes are superimposed together with an optical filter layer interposed between them which separates a multiplex optical signal into the first and second wavelength signals. Owing to their monolithic structure, the photodiodes of the present invention are extremely useful for receiving multiplex optical signals having a plurality of different wavelengths.
REFERENCES:
patent: 4179702 (1979-12-01), Lamorte
patent: 4213138 (1980-07-01), Campbell
Iguchi Shin-Ichi
Nishizawa Hideaki
Edlow Martin H.
Sumitomo Electric Industries Ltd.
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