Title:
A METHOD, AN APPARATUS AND AN OPTICAL MODULATOR FOR PHASE ADJUSTMENT
Document Type and Number:
WIPO Patent Application WO/2009/010007
Kind Code:
A1
Abstract:
A method for phase adjustment comprises: obtaining a response signal including
a low frequency disturbing signal, and obtaining a response signal with the frequency
of the low frequency disturbing signal according to the said response signal;
dividing a standard clock period with a predetermined length into two equal slots,
and with a sampling clock sampling the said response signal with the frequency
of the low frequency disturbing signal in the said slots; in the said two divided
slots, obtaining sampling values of the said response signal; obtaining a characteristic
value by using all the sampling values in each slot, and obtaining the characteristic
difference value between two characteristic values; obtaining an adjusting
difference value between the characteristic difference value and a predetermined
threshold, and shifting the phase of the said low frequency disturbing signal
with a corresponding angle according to the said adjusting difference value,
in order to keep the phase difference between the low frequency disturbing signal
and the response signal constant. An apparatus and an optical modulator for phase
adjustment are also disclosed in this invention.
Inventors:
FAN XIAOYAN (CN)
Application Number:
PCT/CN2008/071642
Publication Date:
January 22, 2009
Filing Date:
July 15, 2008
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
FAN XIAOYAN (CN)
FAN XIAOYAN (CN)
International Classes:
H03L7/091; G02F1/01; H04B10/50; H04B10/58
Foreign References:
| CN1253756C | 2006-04-26 | |||
| CN1254851A | 2000-05-31 | |||
| CN1954499A | 2007-04-25 | |||
| CN2517183Y | 2002-10-16 | |||
| EP1696570A2 | 2006-08-30 | |||
| JP2000122015A | 2000-04-28 |
Other References:
REN G.Z. ET AL.: "Phase Measurement Technology", ELECTRICAL MEASUREMENT & INSTRUMENTATION, no. 9, September 1990 (1990-09-01), pages 41 - 60
JIN G.C.: "New Progress and Applications of Phase Measuring Techniques", PHYSICS, vol. 22, no. 6, June 1993 (1993-06-01), pages 374 - 378
JIN G.C.: "New Progress and Applications of Phase Measuring Techniques", PHYSICS, vol. 22, no. 6, June 1993 (1993-06-01), pages 374 - 378
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (Scitech PlaceNo.22, Jian Guo Men Wai Ave., Chao Yang District, Beijing 4, CN)
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