Title:
OPTICAL DEMULTIPLEXER
Document Type and Number:
Japanese Patent JP3242332
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the optical demultiplexer in which signal light beams, that are wavelength multiplexed, are precisely and simply separated with a good sensitivity and taken out in a wavelength divided multiplex transmission type optical communication system.
SOLUTION: The optical demultiplexer 10 radiates a multiplexed signal optical beam bm from an irradiating collimator 1 onto a transmission type interference filter 3 in which a tilt angle θ varies and at least a portion of the passed signal optical beams is received by a light receiving collimator 2. The collimator 2 is located at a position L1 which is parallel moved for a constant distance (d) in the direction approaching to a top part 3e of the filter 3 that is tilted from a reference alignment position L0 where the transmission loss of the beam bm becomes a minimum while the filter 3 is not inserted.
Inventors:
Hitoshi Oguri
Tomomi Yanagimachi
Tomomi Yanagimachi
Application Number:
JP27491696A
Publication Date:
December 25, 2001
Filing Date:
October 17, 1996
Export Citation:
Assignee:
Sumitomo Osaka Cement Co., Ltd.
International Classes:
G02B26/00; G02B6/293; H04B10/2507; H04B10/27; H04B10/29; H04J14/00; H04J14/02; (IPC1-7): G02B26/00; G02B6/293; H04B10/02; H04J14/00; H04J14/02
Domestic Patent References:
| JP439632A | ||||
| JP271205A |
Attorney, Agent or Firm:
Masatake Shiga (1 person outside)
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