US4862236A | 寵物協尋網
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Asemiconductingphotodiodefordetectinglightatapredeterminedwavelengthincludes,accordingtothisinvention,afirstsemiconductingregionhavinga ...
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The United States Government has rights in this invention pursuant to a contract awarded by the National Security Agency.
BACKGROUND OF THE INVENTIONThis invention is concerned with semiconducting photodiodes.
The availability of optical fibers with low attenuation and minimum dispersion in the 1.3 to 1.6 μm region has motivated research directed at the development of optical sources and photodetectors which will operate at these wavelengths so that practical fiber optical systems can be implemented in this region of the optical spectrum. The problems encountered in fabricating these devices, such as long wavelength avalanche photodiodes (APDs), have been primarily related to materials. The devices utilized in the prior art, which have been produced from germanium or Group III-V alloys, have exhibited a combination of high leakage currents, soft breakdowns, and relatively lo...
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