Title:
CORRECTION METHOD, OPTICAL MODULATION SYSTEM, AND OPTICAL DEMODULATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/132112
Kind Code:
A1
Abstract:
An optical modulation system (1) comprises a correction function which corrects an operation point drift of an MZ optical modulation apparatus (12) by feedback control using a low-frequency signal (#12). An assessment unit (18) assesses the stability of the feedback control. Additionally, a low-frequency signal generation unit (14) switches the low-frequency signal (#12) frequency from a first frequency to a second frequency when it is assessed that the feedback control is unstable.
Inventors:
FUJISAKU YOSHIHARU
Application Number:
PCT/JP2011/077382
Publication Date:
October 04, 2012
Filing Date:
November 28, 2011
Export Citation:
Assignee:
FUJIKURA LTD (JP)
FUJISAKU YOSHIHARU
FUJISAKU YOSHIHARU
International Classes:
E02B3/00; A01G31/00; G02F1/03; H04B10/04; H04B10/06; H04B10/142; H04B10/152
Domestic Patent References:
| WO2009078435A1 | 2009-06-25 |
Foreign References:
| US6392779B1 | 2002-05-21 | |||
| JP2007181171A | 2007-07-12 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)
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