Title:
OPTICAL MODULATOR
Document Type and Number:
WIPO Patent Application WO/2007/123175
Kind Code:
A1
Abstract:
Light having components of frequencies f0, f+1 and f-1
outputted from an optical modulator (10) is monitored, a second light detection
means (14b) measures the power P2 of all the components, and a first light detection
means (14a) measures the power P1 with frequency f0 component cut out
by a filter means (13). Based on these light receiving powers (P1) and (P2), phase
differences imparted by the respective DC electrodes of Mach-Zehnder optical
waveguides (MZ-A, MZ-B, MZ-C) of the optical modulator (10) are controlled.
The control is performed to minimize the light receiving power (P1) and to maximize
the light receiving power (P2).
Inventors:
HIGUMA KAORU (JP)
SAKANE TOSHIO (JP)
SAKANE TOSHIO (JP)
Application Number:
PCT/JP2007/058522
Publication Date:
November 01, 2007
Filing Date:
April 19, 2007
Export Citation:
Assignee:
SUMITOMO OSAKA CEMENT CO LTD (JP)
HIGUMA KAORU (JP)
SAKANE TOSHIO (JP)
HIGUMA KAORU (JP)
SAKANE TOSHIO (JP)
International Classes:
G02F1/035
Foreign References:
| JP2003234703A | 2003-08-22 | |||
| JP2005215196A | 2005-08-11 | |||
| JP2005134897A | 2005-05-26 |
Other References:
KAWANISHI T. ET AL.: "Hikari FSK Hencyoki o Mochiita Koshokohi Rof SHingo no Hassei (GENERATION OF DOUBLE SIDEBAND RADIO-ON-FIBER SIGNAL WITH LARGE CARRIER SUPPRESSION RATIO)", 2005 NEN THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS ELECTRONICS SOCIETY TAIKAI KOEN RONBUNSHU 1, vol. 2005, 7 September 2005 (2005-09-07), pages S.61 - S.62, XP003013273
See also references of EP 2015129A4
See also references of EP 2015129A4
Attorney, Agent or Firm:
SHIGA, Masatake et al. (YaesuChuo-ku, Tokyo 53, JP)
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