CN1048133A - 放大光信号的装置和方法 - Google Patents

放大光信号的装置和方法 Download PDF

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Publication number
CN1048133A
CN1048133A CN90104196A CN90104196A CN1048133A CN 1048133 A CN1048133 A CN 1048133A CN 90104196 A CN90104196 A CN 90104196A CN 90104196 A CN90104196 A CN 90104196A CN 1048133 A CN1048133 A CN 1048133A
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China
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medium
light
optical
signal
input
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CN90104196A
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皮特·科斯顿
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Alcatel Lucent NV
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Alcatel NV
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
    • G02F1/395—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves in optical waveguides
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optical Communication System (AREA)
  • Lasers (AREA)

Abstract

一种用光学手段直接放大光信号的装置和方法，它不需要“光、-电-光”的转换由电路放大电信号，以补偿长距离光纤造成的光信号衰减。采用一种直接的光中继转发器，它包含有可传输两种模式的光的介质媒体10。该媒体具有非线性的光特性，并设置有两个输入端11、12和两个输出端13、14。待放大的光信号由一个输入端输入，高能量的光由另一个输入端输入，在输出端便可得到已放大的光信号。在介质媒体周围还可外加电场来控制光放大器。

Description

本发明涉及放大光信号的装置和方法，具体涉及直接放大光信号的装置和方法。
当数据沿光纤传输时，光纤造成的衰减会使信号电平下降。所以，对于长距离传输，必须提供中继转发器以提高输入脉冲的电平。中继转发器的工作情况如下：到达中继转发器的光信号借助于光电二极管或其它的光敏检测器转换为电脉冲。然后，将这些电脉冲进行电信号放大。通过电路放大的脉冲用来驱动一个激光二极管，使电脉冲转换回光脉冲。而后，中继转发器的输出传送到一个光波导上，光信号在光波导内传输。中继转发器都是由半导体、具体是三价-五价（p（p型-n型）半导体集成电路装置成的，这种先有技术的解决方案缺点在于，“光脉冲-电脉冲-光脉冲”的转换需要大量的电路。此外，在吉比特（109比特）范围内的电路放大不是件容易的事。为此，本发明的目的是提供一种较简单的方法和一种较简单的装置，它不需要信号的两次转换，并能可靠地处理高的数据率。
这一目的的实现应用了一种光信号放大装置和方法。该装置包括一个介质媒体，光束至少可通过两个输入端口馈入其中，该介质媒体允许两种模式的光传输，并具有至少一个输出端口;介质媒体的特征在于，它具有非线性的光特性。直接放大光信号的方法的特征在于，在呈现非线性光特性的介质媒体内，高能量的光由光信号进行调制。
本发明的装置的优点在于，光信号通过输入端口之一馈入介质媒体内，高能量的光经另一输入端口馈入该介质媒体，则在其输出端口上就可得到已放大的光信号。
本发明的方法有这样的优点，直接的光放大可以减小中继转发器电路的复杂性，且借助于外加电场可均衡光放大器的相速度或控制放大量。
下面，参照以下附图来说明本发明的一个实施例。
图1示出光转发器的结构;
图2示出转发器阵的结构。
图1中，10是一种介质媒体，其中可传输两种模式的光。11和12是输入端口，13和14是输出端口。介质媒体10周围有两个电极15和16。实现光转发器功能的一个重要的前提，是介质媒体10应具有非线性的光特性。如果通过两个输入端口中的一个例如端口11将一个光信号馈入介质媒体10（下文亦称为“双模式区域”），并通过另一输入端口12将高能量的光连续地或以输入端口11上所存在信号的脉冲重复频率馈入该双模式区域，则非线性的光特性会使通过输入端口12馈入区域10的一部分光能量耦合到通过输入端口11馈入区域10的光信号中。于是，输出端口13和14中的一个上将得到一个放大了的光信号。应该注意，对于转发器的实现其功能，只需单一个输出端口就足够了。
如果应用于双模式区域的介质媒体除了非线性光特性外还具有电光效应，则借助于两个电极15和16可控制两种模式的光的相速度。例如，可以应用这一点来均衡光转发器，或者补偿连续式或脉冲式光源的强度的波动。
图2示出由几个图1所示出的光转发器构成的一个转发器阵。各个转发器部件用20、21、22和24标记。图2中，几个光转发器的共同传输只在以下情况下才可能：如果来自系统的一个信号能出现在仅仅一个输入端口上，或者出现在各个输入端口上的信号脉冲在时间上相互错开，并不重叠。

Claims (8)

1、一种光信号放大装置，它包括：一个介质媒体(10)，光束至少可通过两个输入端口(11，12)馈入其中，该媒体(10)允许两种模式的光传输，并具有至少一个输出端口(13，14)；其特征在于，介质媒体(10)具有非线性的光特性。
2、根据权利要求1所述的装置，其特征在于，光信号通过输入端端口之一（11）进入介质媒体（10）中。
3、根据权利要求1所述的装置，其特征在于，通过输入端口之一（12）高能量的光连续地或以脉冲形式进入介质媒体（10）中。
4、根据权利要求2和3所述的装置，其特征在于，在输出端口（13，14）上可得到已放大的光信号。
5、根据权利要求1所述的装置，其特征在于，介质媒体（10）周围设置有两个控制电极（15、16）。
6、用光学方法直接放大光信号的一种方法，其特征在于，在呈现非线性光特性的介质媒体内，高能量的光由光信号进行调制。
7、根据权利要求6所述的方法，其特征在于，该介质媒体允许两种模式的光传输。
8、根据权利要求7所述的方法，其特征在于，放大量可由外部电场进行控制。
CN90104196A 1989-06-10 1990-06-08 放大光信号的装置和方法 Pending CN1048133A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919006A DE3919006A1 (de) 1989-06-10 1989-06-10 Vorrichtung und verfahren zur verstaerkung optischer signale
DEP3919006.4 1989-06-10

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CN1048133A true CN1048133A (zh) 1990-12-26

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EP (1) EP0402767A2 (zh)
JP (1) JPH03101717A (zh)
KR (1) KR910001439A (zh)
CN (1) CN1048133A (zh)
AU (1) AU5694890A (zh)
DE (1) DE3919006A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844293B1 (de) * 1996-11-21 2002-01-16 Rolic AG Bistabile ferroelektrische Flüssigkristallzelle
JP4669313B2 (ja) * 2005-04-06 2011-04-13 ラボアットサイト有限会社 冊子用表紙の作成方法、及び冊子用表紙キット

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EP0402767A2 (de) 1990-12-19
JPH03101717A (ja) 1991-04-26
AU5694890A (en) 1990-12-13
KR910001439A (ko) 1991-01-30
DE3919006A1 (de) 1990-12-13

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