Optical demultiplexer and optical transmission system

Optical communications – Multiplex – Wavelength division or frequency division

Reexamination Certificate

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C398S082000

Reexamination Certificate

active

10407935

ABSTRACT:
It is an object of the present invention to provide an optical transmission system in which multiple optical frequencies can be efficiently used and the change of the system can be easily made, and to provide an optical demultiplexer suitable for such optical transmission system. In an optical demultiplexer according to the present invention, signal light having a plurality of wavelength components arranged on a grid having predetermined frequency intervals is input from an input port thereof to be demultiplexed. The demultiplexed signal lights output from the output ports thereof have a plurality of wavelength components, respectively, and any three wavelength components, fa, fb, and fd, that satisfy the following conditions: fa<fb<fd; and fd−fa≦NΔf have the following relationship: 2fb≠fa+fdwhere N represents an integer, and Δf represents each of the predetermined frequency intervals.

REFERENCES:
patent: 5410624 (1995-04-01), Morkel
patent: 5589969 (1996-12-01), Taga et al.
patent: 5841557 (1998-11-01), Otsuka et al.
patent: 6118561 (2000-09-01), Maki
patent: 6118563 (2000-09-01), Boskovic et al.
patent: 6157754 (2000-12-01), Sasaoka et al.
patent: 6366376 (2002-04-01), Miyata et al.
patent: 6782203 (2004-08-01), Lin et al.
patent: 6930824 (2005-08-01), Ishikawa et al.
patent: 2001/0015836 (2001-08-01), Kim et al.
patent: 7-264166 (1995-10-01), None
patent: 8-211237 (1996-08-01), None
patent: 08-256128 (1996-10-01), None
patent: 09-247091 (1997-09-01), None
patent: 11-154934 (1999-06-01), None
Forghieri F et al, “Reduction Of Four-Wave Mixing Crosstalk In WDM Systems Using Unequally Space Channels”, vol. 6, No. 6, Jun. 1994, pp. 754-756, XP000457239.
Jae-Seung Lee et al, “Periodic Allocation Of A Set Of Unequally Spaced Channels for WDM Systems Adopting Dispersion-Shifted Fibers”, vol. 10, No. 6, Jun. 1998, XP011046088.
Fakui M et al, “Esperimental Verification Of Cascadability Of 12 Channel X 2.5 Gb/s WDM Add/drop Multiplexer Employing Unequally-spaced Arrayed-waveguide Grating”, vol. 4, Sep. 15, 1996, pp. 103-106, XP010303172.
Lee S-S et al, “Enchancement Of Power Margin And Scalability In WDM Links Adopting Dispersion-Shifted Fibres Using Periodic-Unequally-Spaced-Channel Allocation”, vol. 35, No. 14, Jul. 8, 1999, pp. 1176-1177, XP000939530.
Kyo Inoue, “Arrangement Of Orthogonal Polarized Signals For Suppressing Fiber Four-Wave Mixing In Optical Multichannel Transmission Systems”, vol. 3, No. 6, Jun. 1, 1991, pp. 560-563, XP000227356.
European search Report dated Jun. 21, 2006.
Japanese Office Action issued in corresponding Japanese Patent Application No. 2002-105365, dated Feb. 6, 2007.

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