Optical apparatus for optical communication terminal and optical communication system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 28, 2003
Grant Date -
Mar 14, 2002
app pub date -
Jun 14, 2001
filing date -
Sep 11, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A compact optical apparatus for use in optical communication is provided which can be manufactured at low costs with ease. A common terminal is mounted to receive diverging light with a long wavelength and to output light with a short wavelength, and an input terminal is mounted to receive light with a short wavelength. An output terminal is mounted to transmit light with the long wavelength to a light receiver. A wavelength selecting filter permits the light with the long wavelength to pass to the light receiver and reflects light transmitted from the input terminal so as to selectively direct it to the common terminal. First and second computer-generated hologram devices guide diverging light from the input terminal to the common terminal via the wavelength selecting filter.
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