Title:
OPTICAL SIGNAL PROCESSOR
Document Type and Number:
WIPO Patent Application WO/2003/073052
Kind Code:
A1
Abstract:
An optical signal processor (1) comprises a fiber collimators (110 to 113), a first diffraction grating device (121), a second diffraction grating device (122), a first half -wave plate (131), and a second half-wave plate (132). The diffraction grating devices (121, 122) are of a reflective type, have a diffraction plane parallel to the y-z plane, and have a direction of grating parallel to the z-axis. The diffraction grating device (121) diffracts the light beam collimated by and outputted from a fiber collimator (110). The diffraction grating device (122) re-diffracts the light beam diffracted by the diffraction grating device (121). The direction of the optical axis of the half-wave plate (131) is at an angle of 45 degrees with respect to that of the half-wave plate (132). The half-wave plates (131, 132) are joined to each other and disposed on the optical path between the diffraction grating devices (121, 122).
Inventors:
TAKUSHIMA MICHIKO (JP)
SANO TOMOMI (JP)
SANO TOMOMI (JP)
Application Number:
PCT/JP2003/001588
Publication Date:
September 04, 2003
Filing Date:
February 14, 2003
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
TAKUSHIMA MICHIKO (JP)
SANO TOMOMI (JP)
TAKUSHIMA MICHIKO (JP)
SANO TOMOMI (JP)
International Classes:
G01J3/18; G02B6/34; G02B27/44; G06E3/00; (IPC1-7): G01J3/18; G02B5/18; G02B5/30; G02B27/10; G02B27/28
Foreign References:
| JP2001004447A | 2001-01-12 | |||
| JPH05215918A | 1993-08-27 | |||
| JPH02159528A | 1990-06-19 | |||
| JPH07151982A | 1995-06-16 | |||
| JPH05100114A | 1993-04-23 | |||
| JPS5960408A | 1984-04-06 | |||
| JP2002323374A | 2002-11-08 |
Attorney, Agent or Firm:
Hasegawa, Yoshiki (Ginza First Bldg. 10-6, Ginza 1-chom, Chuo-ku Tokyo, JP)
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