Title:
OPTICAL SIGNAL PROCESSING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/047970
Kind Code:
A1
Abstract:
An optically encoding circuit (200) uses a plurality of optical encoders including an optical non-linear element having a periodicity different in I/O characteristics associated with light intensity, so as to optically encode a signal light pulse string having a first wavelength according to control light as a pulse string of an optical analog signal having a second wavelength in the vicinity different from the first wavelength and optically sampled, and output the optically-encoded signal light pulse strings from the optical encoders. A light quantization circuit (300) uses a plurality of light threshold value processors connected to the respective optical encoders and including an optical non-linear element having I/O characteristic associated with light intensity having periodicity, so as to subject the carrier light pulse string having the third wavelength in the vicinity different from the first wavelength to the light threshold value processing and light quantization according to the signal pulse light strings which have been optically encoded, and output it as an optical digital signal.
More Like This:
| JPS57148725 | OPTICAL ANALOG-TO-DIGITAL CONVERTER |
Inventors:
KITAYAMA KEN-ICHI (JP)
IKEDA KENSUKE (JP)
JALIL MOHAMMAD ABDUL (JP)
NAMIKI SHU (JP)
INOUE TAKASHI (JP)
IKEDA KENSUKE (JP)
JALIL MOHAMMAD ABDUL (JP)
NAMIKI SHU (JP)
INOUE TAKASHI (JP)
Application Number:
PCT/JP2004/017007
Publication Date:
May 26, 2005
Filing Date:
November 16, 2004
Export Citation:
Assignee:
JURIDICAL FOUNDATION OSAKA IND (JP)
KITAYAMA KEN-ICHI (JP)
IKEDA KENSUKE (JP)
JALIL MOHAMMAD ABDUL (JP)
NAMIKI SHU (JP)
INOUE TAKASHI (JP)
KITAYAMA KEN-ICHI (JP)
IKEDA KENSUKE (JP)
JALIL MOHAMMAD ABDUL (JP)
NAMIKI SHU (JP)
INOUE TAKASHI (JP)
International Classes:
G02F7/00; G02F1/365; G02F2/02; G02F3/00; (IPC1-7): G02F7/00; G02F2/02; G02F3/00
Foreign References:
| JP2001117125A | 2001-04-27 | |||
| JP2003075787A | 2003-03-12 | |||
| JPH11231361A | 1999-08-27 |
Other References:
JEONG J.M. ET AL.: "All-optical analog-to-digital and digital-to-analog conversion implemented by nonlinear fiber interferometer", OPTICS COMMUNICATIONS, vol. 91, 1 July 1992 (1992-07-01), pages 115 - 122, XP000278063
See also references of EP 1688785A4
See also references of EP 1688785A4
Attorney, Agent or Firm:
Kawamiya, Osamu (IMP Building 3-7, Shiromi 1-chome, Chuo-ku, Osaka-sh, Osaka 01, JP)
Download PDF: