Optical fiber wavelength, multiplexer and demultiplexer
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United States of America Patent
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Dec 11, 2001
Issued Date -
N/A
app pub date -
Jul 29, 1998
filing date -
Feb 14, 1997
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Abstract
The present invention relates to an optical fiber wavelength multiplexing or demultiplexing device comprising: An optical fiber wavelength multiplexing device comprising: an array of input single-mode fibers (101 to 105) designed for carrying light beams at different wavelengths (.lambda.1, .lambda.2, .lambda.2, . . . ,.lambda.n), an output single-mode fiber (161) designed for carrying the whole set of such light beams, a dispersing system (107) receiving light beams from the input fibers (101 to 105) in an end plane and generating superimposed light beams designed for the output fiber (161) in an output plane, an array of converging microlenses (171 to 175) being located in the input plane, whereas a microlens corresponds to each input fiber, wherein the microlens array has the same pitch as the input fiber anlay and produces diverging beams whose respective central axes are parallel and which are directed to a collimating lens (108) which produces parallel collimated beams whose respective central axes are converging on the dispersing system. The demultiplexer comprises the same elements, whereas the roles of the input/output fibers and planes are reversed.
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