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1. 发明公开

EP1065811A3 Optical amplifiers 有权
标题翻译：光放大器
公开(公告)号：EP1065811A3
公开(公告)日：2001-02-21
申请号：EP00200731.8
申请日：2000-03-02
申请人： Nortel Networks Limited
发明人： Jones, Kevan P. , Gibb, Roger M. , Baker, Robert A. , Poettcker, Martin P. , Bray, Mark E. , Flintham, Barrie , Regan, James , Reid, Toby J. , Solheim, Alan A. , Keys, Robert W. , Hinds, Mark R. , Mun, Joseph , Jolley, Nigel E. , Robinson, Alan , King, Jonathan P. , Parry, Simon
IPC分类号： H04B10/17 , H04B10/213 , H04J14/02
CPC分类号： H04B10/294 , H04B10/0777 , H04B2210/078 , H04J14/0209 , H04J14/0213 , H04J14/0219 , H04J14/0221
摘要： In a WDM optical transmission system employing optical amplifiers (16) in its transmission path (13), a supervisory signal channel, used for monitoring and controlling the operation of the amplifiers and spectrally separated from the data transmission, may be multiplexed with the data. A construction of amplifier is disclosed which is capable of being upgraded with an upgrade of the transmission system to include additional data handling capacity, for instance data transmission in an additional waveband and/or in the opposite direction, without interruption of the pre-upgrade data transmission path through the amplifiers. This is accomplished by the use of channel dropping and insertion filters (41,42) disposed so that the amplifying data transmission path extends via the drop/insertion channel of those filters.
摘要翻译：在其传输路径（13）中采用光放大器（16）的WDM光传输系统中，用于监视和控制放大器的操作并与数据传输在频谱上分开的监控信号信道可与数据复用。公开了一种放大器结构，其能够随着传输系统的升级而升级，以包括额外的数据处理能力，例如在附加波段和/或相反方向上的数据传输，而不中断升级前数据传输路径通过放大器。这是通过使用信道放置和插入滤波器（41,42）来实现的，放大的数据传输路径通过这些滤波器的放下/插入信道延伸。

2. 发明公开

EP1041424A2 Integrated optical Mach Zehnder structures 审中-公开
标题翻译： Integriert-optische Mach-Zehnder Strukturen
公开(公告)号：EP1041424A2
公开(公告)日：2000-10-04
申请号：EP00301124.4
申请日：2000-02-14
申请人： Nortel Networks Limited
发明人： Thompson, George Horace Brook
IPC分类号： G02F1/01 , G02F1/313
CPC分类号： G02F1/225 , G02F1/0147 , G02F1/025 , G02F1/3136
摘要： An integrated optical Mach Zehnder structure has an optical path length modifying heater (phase-shifter) (23) associated with a portion of the length of each interference am, (15,16) of the Mach Zehnder. The portion of the length of the interference arm associated with one of the heaters is flanked with trenches (27) that provide that portion with a temperature coefficient of birefringence different from that of the corresponding portion of the other interference arm. The invention is applicable not only to stand-alone Mach Zehnders, but also to more complex Mach Zehnder structures having a series combination of two or more component Mach Zehnders that are close coupled by having the two outputs of one component Mach Zehnder of the complex structure constitute the two inputs of the next component Mach Zehnder of the complex structure.
摘要翻译：集成的光学马赫曾德结构具有与Mach Zehnder的每个干涉距离（15,16）的长度的一部分相关联的光路长度修改加热器（移相器）（23）。与其中一个加热器相关联的干涉臂的长度部分的两侧设有沟槽（27），沟槽（27）使该部分的双折射温度系数与其它干涉臂的对应部分的温度系数不同。本发明不仅适用于独立的Mach Zehnders，而且还适用于具有两个或更多组件Mach Zehnders的串联组合的更复杂的Mach Zehnder结构，其通过具有复合结构的单组分Mach Zehnder的两个输出而紧密耦合构成复合结构的下一个组成部分Mach Zehnder的两个输入。

3. 发明公开

EP1017140A2 Optical amplifier manufacture 审中-公开
标题翻译： Herstellung von eines optischenVerstärkers
公开(公告)号：EP1017140A2
公开(公告)日：2000-07-05
申请号：EP99203986.7
申请日：1999-11-26
申请人： NORTEL NETWORKS CORPORATION
发明人： Flintham, Barrie , Jones, Kevan Peter , Andrews, Stephen
IPC分类号： H01S3/067
CPC分类号： H01S3/06708 , H01S2301/04
摘要： A construction of gain tilt exhibiting optical amplifier that incorporates a gain flattening filter (7) also includes a neutral density filter (14) the value of whose attenuation is adjustable after assembly of the components of the amplifier. This neutral density filter is constructed by the performance of a succession of localised re-fusion operations at a localised region of an optical fibre. By this means the attenuation is increased to a desired value that provides the amplifier with optimised gain flattening at some predetermined value of amplifier external gain.
摘要翻译：包含增益平坦化滤波器（7）的增益倾斜展现光放大器的结构还包括中性密度滤波器（14），其衰减值在组装放大器的组件之后是可调节的。该中性密度滤波器是通过在光纤的局部区域进行一系列局部再融合操作构成的。通过这种方式，衰减增加到期望的值，该放大器在放大器外部增益的某个预定值处提供优化的增益平坦化。

4. 发明公开

EP0881726A3 Direct amplitude modulation of lasers 失效
标题翻译：激光直接调幅
公开(公告)号：EP0881726A3
公开(公告)日：2000-06-28
申请号：EP98303274.9
申请日：1998-04-28
申请人： NORTEL NETWORKS CORPORATION
发明人： Flanigan, Barry John , Carroll, John Edward
IPC分类号： H01S3/103
CPC分类号： H01S5/0625 , H01S5/06251 , H01S5/06258
摘要： A DFB laser is provided with a top electrode (28a, 28b, 38a, 38b, 38c) divided symmetrically into two or three in-line separate elements through which a bias current is applied with a symmetrical distribution and through which a modulation current is applied in push-pull with a temporal asymmetry.

5. 发明公开

EP1009112A2 Duplex Optical transmission system 审中-公开
标题翻译： OptischesÜbertragungssystemfürDuplex-Betrieb
公开(公告)号：EP1009112A2
公开(公告)日：2000-06-14
申请号：EP99203628.5
申请日：1999-11-03
申请人： Nortel Networks Corporation
发明人： Jolley, Nigel Edward , Whiteaway, James Edward Andrew , Davis, Fiona
IPC分类号： H04B10/24 , H04B10/17
CPC分类号： H04B10/291 , H04B10/2503
摘要： In a duplex WDM transmission system, an optical amplifier that uses different amplification paths (22, 25) for amplification of the different directions of signal propagation requires filters (34, 37) to keep the loop gain less than unity for all wavelengths within the amplification waveband. Simple high-pass and low-pass filters can be used when red channels are used for signals propagating in one direction, and blue ones for those propagating in the other. Comb filters are, however, required for use in any optical amplifier employed such a transmission system using any form of interleaved form of channel allocation in place of the red/blue allocation. Examples of such amplifiers are described, these amplifiers having flitters possessing an arrayed waveguide grating structure (44).
摘要翻译：在双工WDM传输系统中，使用不同放大路径（22,25）进行信号传播的不同方向的放大的光放大器需要滤波器（34,37）来保持放大期间所有波长的环增益小于单位波段。当红色通道用于在一个方向上传播的信号时，可以使用简单的高通滤波器和低通滤波器，而在另一个方向上传播的信号用于蓝色通道。然而，梳状滤波器需要用于使用这种传输系统的任何光放大器，其使用任何形式的交织形式的信道分配来代替红/蓝分配。描述了这种放大器的示例，这些放大器具有具有阵列波导光栅结构（44）的颤振器。

6. 发明授权

EP0779689B1 Gain clamped optical amplifier 失效
标题翻译：光放大器具有稳定增益
公开(公告)号：EP0779689B1
公开(公告)日：1999-08-25
申请号：EP96308900.8
申请日：1996-12-09
申请人： NORTEL NETWORKS CORPORATION
发明人： Byron, Kevin Christopher , Sugden, Kate, Dept.Electr.Eng. & Appl.Physics
IPC分类号： H01S3/131
CPC分类号： H01S3/1302 , G02B6/2932 , H01S3/0675

7. 发明公开

EP0926532A3 Electrically controllable optical attenuator 审中-公开
标题翻译：电控光学衰减器
公开(公告)号：EP0926532A3
公开(公告)日：1999-07-07
申请号：EP98309206.5
申请日：1998-11-10
申请人： NORTHERN TELECOM LIMITED
发明人： Day, Stephen , Clapp, Terry Victor
IPC分类号： G02F1/03
CPC分类号： G02F1/225 , G02F2201/16 , G02F2203/04 , G02F2203/48
摘要： A known form of electrically controlled optical attenuator is formed by a Mach Zehnder waveguide configuration with a variable refractive index element in one arm to modify the undulatory spectral characteristic of the network to give a specific attenuation at a specific wavelength. The spectral characteristic of the network makes the attenuation that it provides wavelength dependent. An attenuator with a wavelength dependence of reduced magnitude is provided by the series combination of two Mach Zehnder networks (30a, 30b), one (30a) having an electrically controllable optical path length adjuster (37a) in its longer interference arm (34a), and the other (30b) with its adjuster (37b) in its shorter arm (35b).
摘要翻译：已知形式的电控光学衰减器由马赫曾德尔波导配置形成，在一个臂中具有可变折射率元件，以修改网络的波动光谱特性以在特定波长处给出特定的衰减。网络的光谱特性使其产生与波长相关的衰减。具有减小的波长依赖性的衰减器由两个马赫曾德尔网络（30a，30b）的串联组合提供，一个（30a）在其较长的干涉臂（34a）中具有可电控制的光程长度调节器（37a）和另一个（30b）与其调节器（37b）在其较短臂（35b）中。

8. 发明公开

EP0917739A1 SEMICONDUCTOR PHOTODETECTOR PACKAGING 失效
标题翻译：包装纸半导体光电检测器
公开(公告)号：EP0917739A1
公开(公告)日：1999-05-26
申请号：EP97933796.0
申请日：1997-08-01
申请人： NORTHERN TELECOM LIMITED
发明人： SEVERN, John, Kenneth
IPC分类号： G02B6 , H01L31
CPC分类号： G02B6/4204 , G02B6/4202 , G02B6/4212 , G02B6/4245 , G02B6/4254 , G02B6/4257 , G02B6/4274
摘要： A rear light entry photodetector chip (10) is secured face-down with solder (17a, 17b) on to the front face of a ceramic submount (20) provided with a pair of electrically conductive vias (21a, 21b). A frame-shaped mass (17b) of solder seals the chip to the submount to provide a hermetic enclosure protecting sensitive semiconductor surface areas of the photodetector chip where electric fields are liable to be present in the vicinity of a pn or metal/semiconductor junction.

9. 发明公开

EP0891570A1 WAVEGUIDES TO PHOTODETECTOR ASSEMBLY 失效
标题翻译：光纤 - 光检测器连接
公开(公告)号：EP0891570A1
公开(公告)日：1999-01-20
申请号：EP97906822.0
申请日：1997-03-06
申请人： NORTHERN TELECOM LIMITED
发明人： BRICHENO, Terry , PARKER, James, Wilson
IPC分类号： G02B6
CPC分类号： G02B6/4206 , G02B6/4203
摘要： An assembly for combining the outputs from a group of n single mode optical fibres on to the photosensitive surface of a photodetector (1) has an adiabatically tapered bundle (2) of fibres (3) the small end of which is fusion spliced to one end of a length (4) of multimode fibre whose other end is optically coupled with the detector (1) by means of a lens (5).

10. 发明授权

EP0813760B1 WAVELENGTH CONTROL OF DATA-MODULATED LASERS 失效
标题翻译：数据调制的激光的波长控制
公开(公告)号：EP0813760B1
公开(公告)日：1998-09-23
申请号：EP96904216.7
申请日：1996-03-04
申请人： NORTHERN TELECOM LIMITED
发明人： EPWORTH, Richard, Edward
IPC分类号： H01S3/085 , H01S3/06 , H04B10/155
CPC分类号： H04B10/572 , H01S3/0675 , H01S3/08022 , H01S5/0652 , H01S5/141 , H01S5/146 , H04B10/505 , H04B10/58
摘要： An optical communications source has a laser optically coupled with an external optical modulator (25). The laser has a long optical cavity and a narrow spectral bandwidth Bragg reflector (24) so that the longitudinal mode separation of the laser emission is small compared with the spectral bandwidth of the reflector. This makes the laser operate multi-mode, but without any significant dispersion penalty.

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