Title:
単極光学波長セレクタ
Document Type and Number:
Japanese Patent JP4690891
Kind Code:
B2
Abstract:
A single-pole, wavelength selective switch in which the input optical signal is converted to a light beam having a defined polarization, such as S-polarization, with respect to the system plane. The beam is laterally expanded in the system plane, and then spatially dispersed in the same plane as that of the beam expansion, preferably by means of a diffraction grating. The light is directed through a polarization conversion device, preferably a liquid crystal cell, pixelated along the wavelength dispersive direction such that each pixel operates on a separate wavelength. When the appropriate control voltage is applied to a pixel, the polarization of the light signal passing through that pixel is rotated, such as from S to P. The wavelength dispersed beams from the pixels are recombined, and are passed towards another polarizer at the switch output, aligned such that only the selected polarization components are allowed to exit.
Inventors:
Sue, Shuu
Korem, Yoshi
Korem, Yoshi
Application Number:
JP2005510896A
Publication Date:
June 01, 2011
Filing Date:
November 26, 2003
Export Citation:
Assignee:
EXTERNAL INCORPORATED
International Classes:
G01B9/02; G02F1/061; G01B11/02; G01D9/00; G02B6/00; G02B6/34; G02B27/28
Domestic Patent References:
| JP2003503750A | ||||
| JP2003329993A | ||||
| JP2001203417A | ||||
| JP2005505022A | ||||
| JP2008541187A |
Foreign References:
| US20030030793 | ||||
| US20010046087 | ||||
| US6360037 |
Attorney, Agent or Firm:
Nobuyuki Matsunaga
Soichi Kogo
Soichi Kogo