Title:
VARIABLE WAVELENGTH SELECTION DEVICE
Document Type and Number:
Japanese Patent JP3242839
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To facilitate the manufacture of liquid crystal etalon by eliminating the need for high-level optical axis adjustments and substrate flatness which are used for wavelength multiplex communication.
SOLUTION: The light from a collimator lens 59 has its P wave transmitted through a polarization separating prism 41 to a mirror 43 and its S wave reflected to travel to a mirror 45. The P wave reflected by the mirror 43 is rotated clockwise on the travel direction of the light by 45° through a Faraday element 47, transmitted through the liquid crystal etalon 51 having liquid molecules arrayed slantingly to the same 45° as the angle of the rotation to have wavelength selected, and rotated reversely by 45° through a Faraday element 49 to return to its original state, so that the wave travels straight in the polarization splitting prism 41 and exits to a collimator lens 61. The S wave reflected by the mirror 45, on the other hand, is rotated clockwise on the travel direction of the light by 45° through the Faraday element 49, transmitted through the liquid crystal etalon 51 and has wavelength selected, and rotated reversely by 45° through the Faraday element 47 to return to its original state, so that the wave is reflected by the polarization splitting prism 41 and emitted on the collimator lens 61.
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| WO/1996/024868 | STRIP WAVEGUIDE AND USES THEREOF |
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Inventors:
Yoshihiko Watanabe
Takemichi Kudo
Takemichi Kudo
Application Number:
JP13516696A
Publication Date:
December 25, 2001
Filing Date:
May 29, 1996
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
G02F1/01; G02F1/13; (IPC1-7): G02F1/01; G02F1/13
Domestic Patent References:
| JP9230166A | ||||
| JP9113859A | ||||
| JP85976A | ||||
| JP7128532A | ||||
| JP5323265A |
Attorney, Agent or Firm:
Hidekazu Miyoshi (8 outside)