TOP > 外国特許検索 > Optical signal amplifying triode and optical signal transfer method, optical signal relay device, and optical signal storage device using the same

Optical signal amplifying triode and optical signal transfer method, optical signal relay device, and optical signal storage device using the same

外国特許コード F110005722
整理番号 Y0345WO
掲載日 2011年9月12日
出願国 アメリカ合衆国
出願番号 53242203
公報番号 20060008203
公報番号 7274841
出願日 平成15年9月19日(2003.9.19)
公報発行日 平成18年1月12日(2006.1.12)
公報発行日 平成19年9月25日(2007.9.25)
国際出願番号 JP2003011961
国際公開番号 WO2004038492
国際出願日 平成15年9月19日(2003.9.19)
国際公開日 平成16年5月6日(2004.5.6)
優先権データ
  • 特願2002-308946 (2002.10.23) JP
  • 特願2003-059382 (2003.3.6) JP
  • 特願2003-287576 (2003.8.6) JP
  • 2003WO-JP11961 (2003.9.19) WO
発明の名称 (英語) Optical signal amplifying triode and optical signal transfer method, optical signal relay device, and optical signal storage device using the same
発明の概要(英語) (US7274841)
When in an optical signal amplifying triode 10 , light of a second wavelength lambda2, selected from among light from a first optical amplifier 26 , into which a first input light L1 of a first wavelength lambda1 and a second input light L2 of second wavelength lambda2 have been input, and a third input light (control light) L3of a third wavelength lambda3 are input into a second optical amplifier 34 , an output light L4 of the third wavelength lambda3, selected from among the light output from the second optical amplifier 34 , is light that is modulated in response to the intensity variation of one or both of the first input light L1 of the first wavelength lambda1 and the third input light L3 of the third wavelength lambda3 and is an amplified signal, with which the signal gain with respect to the third input light (control light) L3 of the third wavelength lambda3 is of a magnitude of 2 or more.
An optical signal amplifying triode 10 , which can directly perform an optical signal amplification process using control input light, can thus be provided.
特許請求の範囲(英語) [claim1]
1. An optical signal storage device, storing an optical signal input from an input optical transmission path and enabling taking out of the optical signal at an arbitrary time, comprising: a control light generator, generating control light for converting the optical signal input from the input optical transmission path to wavelengths, which correspond to the transmission destinations contained in the input signal and are the same as or different from that of the optical signal;
a main optical signal amplifying triode unit, receiving the optical signal that has been input and the control light and converting the optical signal that has been input to optical signals of the wavelengths of the control light;an optical distributor, distributing the optical signals, output from the main optical signal amplifying triode unit, in accordance with the wavelengths of the optical signals;an optical buffer memory element, temporarily storing an optical signal of a storage wavelength that has been distributed by the optical distributor;an optical feedback transmission path, feeding back the optical signal output from the optical buffer memory element to the input optical transmission path to re-input the optical signal into the main optical signal amplifying triode unit;
and
an optical signal storage control means, making the control light generator output control light for conversion of the optical signal, which is repeatedly circulated through the main optical signal amplifying triode unit, optical distributor, optical buffer memory element, and the optical feedback transmission path, to an output wavelength at the main optical signal amplifying triode unit.
[claim2]
2. The optical signal storage device according to claim 1, further comprising an optical signal gain control means, controlling the optical signal, fed back by the optical feedback transmission path, or the control light supplied to the main optical signal amplifying triode unit in order to restrain the increase and decrease of the gain of the optical signal that is circulated.
[claim3]
3. The optical signal storage device according to claim 2, wherein the main optical signal amplifying triode unit comprises: a first semiconductor optical amplifier, which performs conversion to a wavelength of a bias light and inversion of the optical signal;
and a second semiconductor optical amplifier, which performs conversion to the wavelength of the control light and inversion of the optical signal that has been inverted by the first semiconductor optical amplifier;
and the optical signal gain control means controls the optical signal, fed back to the optical feedback transmission path, based on the increase or decrease of the gain of the bias light contained in the output light from the second semiconductor optical amplifier.
[claim4]
4. The optical signal storage device according to claim 2, wherein the optical signal gain control means comprises: a first gain control optical amplifier, receiving the bias light and a gain control light, which is a continuous light of a wavelength that differs from that of the bias light, and outputs a gain control light, which decreases in gain in accompaniment with an increase of the gain of the bias light;
and a second gain control optical amplifier, receiving the output light from the first gain control optical amplifier and the optical signal, which is fed back by the optical feedback transmission path, and outputs an optical signal, which increases in gain in accompaniment with a decrease of the gain of the gain control light.
[claim5]
5. The optical signal storage device according to claim 4, wherein either or each of the first gain control optical amplifier and second gain control optical amplifier is arranged from an optical fiber amplifier or an optical waveguide amplifier into which a rare earth element is doped.
[claim6]
6. The optical signal storage device according to claim 2, wherein the optical signal gain control means comprises: an optical operational controller, which controls the gain of the control light supplied to the main optical signal amplifying triode unit based on the increase/decrease of the gain of the optical signal fed back by the optical feedback transmission path in order to maintain fixed the gain of the optical signal that is circulated.
[claim7]
7. The optical signal storage device according to claim 1, further comprising: an electronic controller, controlling the control light generator;
a photoelectric signal converter, converting the optical signal branched by the optic splitter into an electrical signal and supplying the electrical signal to the electronic controller;
and
an optical delay element, disposed at the downstream side of the optical splitter and delaying the optical signal that is to be input into the main optical signal amplifying triode unit upon passage through optical splitter;
and
wherein the electronic controller makes the control light, for conversion of the optical signal to the output wavelength, be generated from the control light generator in response to an output timing indicated by stored signal output information that is supplied from the exterior or is contained in the optical signal.
[claim8]
8. The optical signal storage device according to claim 1, further comprising an all-optical operational controller, which makes the control light, for conversion of the optical signal to the output wavelength, be generated from the control light generator in response to an output timing indicated by stored signal output information that is supplied from the exterior or is contained in the optical signal.
  • 発明者/出願人(英語)
  • MAEDA YOSHINOBU
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 385/24
  • 385/15
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