TOP > 外国特許検索 > METHOD AND DEVICE FOR EXTRACTING CLOCK SIGNAL FROM OPTICAL SIGNAL

METHOD AND DEVICE FOR EXTRACTING CLOCK SIGNAL FROM OPTICAL SIGNAL

外国特許コード F070001652
整理番号 F070001652
掲載日 2007年9月7日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2006JP302785
国際公開番号 WO 2007/004338
国際出願日 平成18年2月10日(2006.2.10)
国際公開日 平成19年1月11日(2007.1.11)
優先権データ
  • 特願2005-257778 (2005.9.6) JP
  • 特願2005-194117 (2005.7.1) JP
発明の名称 (英語) METHOD AND DEVICE FOR EXTRACTING CLOCK SIGNAL FROM OPTICAL SIGNAL
発明の概要(英語) There is provided a clock signal extraction device capable of coping with a high-speed opticalsignal with a simple configuration. A -phase shift fiber Bragg grating(-phase shift FBG) (10) is adjusted so that a reflected light wave phasedifference between itw two sub FBG (1) and FBG (2) is and a delay amountt between reflected light waves is smaller than a bit cycle Tb ofthe optical signal. The optical signal is inputted to the -phase shift FBG.In the reflected light wave outputted from the -phase shift FBG (10), apulse is generated at the rise and fall positions of the NRZ optical signal. The reflectedlight wave passes through an optical circulator (11) and is converted into anelectric signal by a photo-detector (12) and further passes through a narrow-bandpass filter (13) to generate a clock signal. By using a -phase shift Bragggrating including a low-reflectance Bragg grating having four sub FBG (1 to 4),it is possible to improve the wavelength shift resistance of the clock signalextraction.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • University Of Yamanashi
  • 発明者(英語)
  • Hanawa, Masanori
国際特許分類(IPC)
指定国 AE AG AL AM AT AU AZ BA BB BE BF BG BJ BR BW BY BZ CA CF CG CH CI CM CN CO CR CU CY CZ DE DK DM DZ EC EE EG ES FI FR GA GB GD GE GH GM GN GQ GR GW HR HU ID IE IL IN IS IT JP KE KG KM KN KP KR KZ LC LK LR LS LT LU LV LY MA MC MD MG MK ML MN MR MW MX MZ NA NE NG NI NL NO NZ OM PG PH PL PT RO RU SC SD SE SG SI SK SL SM SN SY SZ TD TG TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW
上記の特許・技術に関心のある方は、下記問合せ先にご相談下さい。

PAGE TOP

close
close
close
close
close
close