Wavelength-selective multiplexer-demultiplexer
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United States of America Patent
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Nov 11, 1986
Grant Date -
N/A
app pub date -
Apr 2, 1984
filing date -
Mar 31, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multiplexer-demultiplexer for different wavelengths carried by optical fibers (10) the ends of which are disposed in the immediate vicinity of the focus of a concave mirror (18) associated with a plane diffraction grating (15) is disclosed. The multiplexer-demultiplexer consists of four elements that are adhesively attached to one another, namely, a fiber-carrying element (1); a grating-carrying element (15); an intermediary element (3) of the same index as the element (2); and a mirror element (4) having an index of refraction different from that of element (3) and selected to compensate for longitudinal spherical aberration of the mirror (18) for at least one of the wavelengths being utilized.
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