Title:
PHASE-CONTROLLED LIGHT FSK MODULATOR
Document Type and Number:
WIPO Patent Application WO/2007/034766
Kind Code:
A1
Abstract:
To provide an optical modulator capable of controlling the phase of a USB signal and the phase of an LSB signal of an optical FSK modulated signal. A modulated signal is applied to a main Mach-Zehnder electrode (or an electrode C) (11) of a main Mach-Zehnder waveguide (MZc) (8) thereby to switch the USB signal and the LSB signal so that the FSK modulation can be made. In order to control the phase of the optical signal to be outputted from the main Mach-Zehnder waveguide (MZc) (8), a bias voltage is applied to the main Mach-Zehnder electrode (11) thereby to control the phases, as have not been considered in the prior art, of the USB signal and the LSB signal so that the FSK modulation having the arranged phases can be achieved.
Inventors:
KAWANISHI TETSUYA (JP)
IZUTSU MASAYUKI (JP)
SAKAMOTO TAKAHIDE (JP)
TSUCHIYA MASAHIRO (JP)
IZUTSU MASAYUKI (JP)
SAKAMOTO TAKAHIDE (JP)
TSUCHIYA MASAHIRO (JP)
Application Number:
PCT/JP2006/318478
Publication Date:
March 29, 2007
Filing Date:
September 19, 2006
Export Citation:
Assignee:
NAT INST INF & COMM TECH (JP)
KAWANISHI TETSUYA (JP)
IZUTSU MASAYUKI (JP)
SAKAMOTO TAKAHIDE (JP)
TSUCHIYA MASAHIRO (JP)
KAWANISHI TETSUYA (JP)
IZUTSU MASAYUKI (JP)
SAKAMOTO TAKAHIDE (JP)
TSUCHIYA MASAHIRO (JP)
International Classes:
G02F1/03; G02F1/035; H04B10/516; H04B10/524; H04B10/54; H04B10/556; H04B10/572; H04B10/588; H04B10/61; H04L27/20
Foreign References:
| JPS6313017A | 1988-01-20 | |||
| JPS635306A | 1988-01-11 | |||
| JP2005210537A | 2005-08-04 |
Other References:
SAKAMOTO T. ET AL.: "Kosoku Gaibu Hencho Hoshiki ni yoru Hikari Saisho Hen'i hencho no tameno Seigyoho", IEICE TECHNICAL REPORT, vol. 105, no. 243 (OCS2005 35-45), 19 August 2005 (2005-08-19), pages 45 - 50, XP003010837
SAKAMOTO T. ET AL.: "Novel modulation scheme for optical continuous-phase frequency-shift keying, ofc 2005", TECHNICAL DIGEST, vol. 5, March 2005 (2005-03-01), pages 1 - 3, XP003010838
KAWANISHI T. ET AL.: "Hikari FSK Henchoki o Mochiita Cho Koshokohi Hikari Kyodo Hencho", IEICE TECHNICAL REPORT, vol. 105, no. 243, 19 August 2005 (2005-08-19), pages 41 - 44, XP003003920
KAWANISHI T. ET AL.: "FSK/IM Doji Hencho no Kaiseki oyobi Oyo", IEICE TECHNICAL REPORT, vol. 104, no. 268 (OPE2004 123 TO 138), 20 August 2004 (2004-08-20), pages 41 - 46, XP003010839
SAKAMOTO T. ET AL.: "Novel modulation scheme for optical continuous-phase frequency-shift keying, ofc 2005", TECHNICAL DIGEST, vol. 5, March 2005 (2005-03-01), pages 1 - 3, XP003010838
KAWANISHI T. ET AL.: "Hikari FSK Henchoki o Mochiita Cho Koshokohi Hikari Kyodo Hencho", IEICE TECHNICAL REPORT, vol. 105, no. 243, 19 August 2005 (2005-08-19), pages 41 - 44, XP003003920
KAWANISHI T. ET AL.: "FSK/IM Doji Hencho no Kaiseki oyobi Oyo", IEICE TECHNICAL REPORT, vol. 104, no. 268 (OPE2004 123 TO 138), 20 August 2004 (2004-08-20), pages 41 - 46, XP003010839
Attorney, Agent or Firm:
HIROSE, Takayuki (Chester Court Nihonbashi 1204 1-13, Nihonbashi, Koami-ch, Chuo-ku Tokyo 16, JP)
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