Title:
WAVELENGTH SELECTION SWITCH
Document Type and Number:
WIPO Patent Application WO/2023/136357
Kind Code:
A1
Abstract:
Provided is a low-loss wavelength selection switch in which loss due to a torsional effect of liquid crystal molecules in an LCOS peripheral part (17b) is reduced. The wavelength selection switch has: one or more input ports (10, 11); one or more output ports (18, 19); a polarization adjuster (12) for adjusting the polarization state of light incident from the input port; a dispersive element (14) for demultiplexing wavelength-multiplexed light incident from the input port; and a deflection element for controlling deflection of the demultiplexed light, the deflection element being a liquid crystal on silicon (LCOS) element (17), on an incidence surface of which is provided an optical compensation layer (16) for compensating for diffraction loss of a peripheral part.
Inventors:
HISANAGA KAZUYA (JP)
YANAI YUJIRO (JP)
SAITOH YUKITO (JP)
YANAI YUJIRO (JP)
SAITOH YUKITO (JP)
Application Number:
PCT/JP2023/001163
Publication Date:
July 20, 2023
Filing Date:
January 17, 2023
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02F1/13; G02F1/01; G02F1/13363; G02F1/31
Foreign References:
| JP2020535469A | 2020-12-03 | |||
| JP2006058843A | 2006-03-02 | |||
| JP2009508159A | 2009-02-26 | |||
| JP2008519298A | 2008-06-05 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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