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1. 发明授权

US06788479B2 Tuneable optical filter 有权
标题翻译：可调谐滤光片
公开(公告)号：US06788479B2
公开(公告)日：2004-09-07
申请号：US10433590
申请日：2003-11-10
申请人： Martin Lomas , Peter J Livermore
发明人： Martin Lomas , Peter J Livermore
IPC分类号： G02B522
CPC分类号： G02B6/2931 , G02B6/29311 , G02B6/29361 , G02B6/29395
摘要： A tuneable optical filter includes a moveable filter plate and an associated optical region for filtering an input radiation beam to provide corresponding filtered output radiation. The optical region has spatially varying filtration properties. Piezoelectric actuating elements are provided for moving the filter plate and its associated optical region relative to the beam for selecting a portion of the optical region for use in filtering the beam and thereby tuning the filter. The actuating elements are operable when driven by electrical signals to repetitively engage or be in repetitively slidable contact and thereby impart a lateral force to a surface of the filter plate for moving the optical region relative to the beam in at least one dimension. The filter is especially suitable for use in optical communication systems where there arises a need for occasional system reconfiguration involving retuning optical filters of the system.
摘要翻译：可调谐光学滤波器包括可移动滤光板和相关联的光学区域，用于过滤输入辐射束以提供相应的滤波输出辐射。光学区域具有空间变化的过滤性能。提供压电致动元件用于相对于光束移动滤光板及其相关联的光学区域，用于选择光学区域的一部分以用于过滤光束并由此调谐滤光片。致动元件在由电信号驱动时可操作以重复地接合或重复地可滑动接触，从而向滤板的表面施加横向力，以在至少一个维度上相对于光束移动光学区域。该滤波器特别适用于需要偶然的系统重新配置的光通信系统，该系统重新配置涉及系统的重新调谐滤光器。

2. 发明授权

US06933485B2 Stabilizing power and wavelength of output radiation from a stabilized radiation source in optical communications systems 失效
标题翻译：在光通信系统中稳定的辐射源的稳定功率和波长的输出辐射
公开(公告)号：US06933485B2
公开(公告)日：2005-08-23
申请号：US10239616
申请日：2001-03-14
申请人： Peter J Livermore , Michael J Leach , Graham Butler , Darren Vass
发明人： Peter J Livermore , Michael J Leach , Graham Butler , Darren Vass
IPC分类号： H01S5/12 , H01S5/0687 , G01J1/32
CPC分类号： H01S5/0687
摘要： A stabilized radiation source includes a distributed feedback laser, a back lens for coupling a portion of the output radiation into first and second optical paths, optical detectors for detecting radiation transmitted through the first and second paths, and for generating first and second signals indicative of radiation power, and a control circuit for controlling the laser in response to the signals for stabilizing. The first and second radiation paths are operable to provide substantially unfiltered and wavelength dependent filtered radiation transmission therethrough respectively to the detectors. Unfiltered radiation transmitted through the first path which is converted into the first signal is especially suitable for implementing laser output radiation power stabilization which is output radiation wavelength independent.
摘要翻译：稳定的辐射源包括分布式反馈激光器，用于将输出辐射的一部分耦合到第一和第二光路中的后透镜，用于检测通过第一和第二路径传输的辐射的光学检测器，以及用于产生指示辐射功率和用于响应于稳定信号控制激光的控制电路。第一和第二辐射路径可操作以提供基本上未经滤波和波长相关的滤波辐射透射通过其分别通过检测器。通过转换成第一信号的第一路径传输的未滤波辐射特别适用于实现输出辐射波长独立的激光输出辐射功率稳定。

3. 发明授权

US06810046B2 Method of communicating data in communication systems 有权
标题翻译：在通信系统中传送数据的方法
公开(公告)号：US06810046B2
公开(公告)日：2004-10-26
申请号：US09751294
申请日：2000-12-28
申请人： Ghani A. M Abbas , Peter J Livermore , Philip a Arnold , Bernard J Goatly
发明人： Ghani A. M Abbas , Peter J Livermore , Philip a Arnold , Bernard J Goatly
IPC分类号： H04J322
CPC分类号： H04J3/0602 , H04J3/06 , H04J3/0605 , H04J3/14
摘要： The invention pertains to a communication system (300) including one or more communication channels (10), each channel comprising a transmitter unit (20) and a receiver unit (40). Each transmitter unit (20) is connected through an optical fiber link (30) to its associated receiver unit (40). In operation, each receiver unit (20) receives payload data from its associated sending client and adds overhead data to the payload data to generate corresponding aggregate data (600). The aggregate data of each transmitter unit (20) is conveyed through the fiber link (30) to its associated receiver unit (40) which receives the aggregate data, decodes it to separate the payload data from the overhead data and then outputs the payload data to its associated receiving client. The receiver unit (40) interprets the overhead data and uses it for controlling and managing the payload data in the system (300). The one or more channels of the system (300) are capable of adapting to the bit data rate of their associate payload data; thus, the channels are capable of operating mutually asynchronously, thereby circumventing a need for justification in the aggregate data. Moreover, each transmitter unit (20) is operable to add the overhead data to the payload data when generating the aggregate data so that the number of payload bits relative to the number of overhead bits is in a fixed ratio of 31:1. Such a fixed ratio renders the aggregate data simpler to decode and bit error rate easier to determine therefrom.
摘要翻译：本发明涉及包括一个或多个通信信道（10）的通信系统（300），每个信道包括发射机单元（20）和接收机单元（40）。每个发射机单元（20）通过光纤链路（30）连接到其相关联的接收机单元（40）。在操作中，每个接收器单元（20）从其相关联的发送客户端接收有效载荷数据，并将开销数据添加到有效载荷数据以生成对应的聚合数据（600）。每个发射机单元（20）的聚合数据通过光纤链路（30）传送到其相关联的接收单元（40），接收单元（40）接收聚合数据，对其进行解码，以将有效载荷数据与开销数据分离，然后输出有效载荷数据到其相关联的接收客户端。接收器单元（40）解释开销数据并使用它来控制和管理系统（300）中的有效载荷数据。系统（300）的一个或多个信道能够适应其相关有效载荷数据的比特数据速率; 因此，信道能够相互异步地进行操作，从而避免了在汇总数据中的正当性的需要。此外，每个发射机单元（20）可操作以在生成聚合数据时将开销数据添加到有效载荷数据，使得相对于开销比特数的有效载荷比特数量为31:1的固定比例。这样的固定比例使得聚合数据更简单，从而更容易解码，误码率更容易确定。

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