公开(公告)号：WO1985001802A1

公开(公告)日：1985-04-25

申请号：PCT/GB1984000354

申请日：1984-10-19

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  KASHYAP, Raman ,  REEVE, Michael, Harry ,  CASSIDY, Stephen, Anthony ,  HORNUNG, Stephen

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: G02B06/10

CPC classification number: G02B6/02 ,  G02B6/02033 ,  G02B6/2861 ,  G02B6/3628 ,  G02F1/0115 ,  G02F1/132

Abstract: An optical fibre has a coating of, for example, liquid crystal polymer which causes temperature-dependent stress-induced changes in the optical fibre such as to counteract temperature-induced changes in the transmission delay of the fibre.

公开(公告)号：WO1991009478A1

公开(公告)日：1991-06-27

申请号：PCT/GB1990001916

申请日：1990-12-07

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY ,  COOPER, Anthony, James ,  FENNING, Simon, Charles ,  REEVE, Michael, Harry ,  BICKERS, Lawrence ,  ROSHER, Paul, Adrian

Inventor： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

IPC: H04G11/00

CPC classification number: H04J14/0298

Abstract: An optical fibre communications system includes an exchange (E) and a plurality of subscriber lines (1). The exchange (E) provides a plurality of services in different subcarrier frequencies (6, 8, 9, 10). Each subscriber line (1) is provided with terminal apparatus (5) operable at different subcarrier frequencies, and a control (11) at the exchange (E) tunes the terminal apparatus to transmit and/or receive on a particular frequency in response to a request. The request may be a signal from the terminal apparatus (5), or an incoming service request addressed to the particular terminal apparatus.

Abstract translation: 光纤通信系统包括交换机（E）和多条用户线路（1）。 交换机（E）在不同的子载波频率（6,8,9,10）中提供多个业务。 每个用户线路（1）设置有可在不同子载波频率下操作的终端设备（5），并且交换机（E）处的控制（11）响应于一个特定频率来调谐终端设备发送和/或接收特定频率 请求。 请求可以是来自终端装置（5）的信号，或者是寻址到特定终端装置的传入服务请求。

公开(公告)号：WO1988007689A1

公开(公告)日：1988-10-06

申请号：PCT/GB1988000225

申请日：1988-03-24

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY ,  JAMES, Simon, Mark ,  DAVISON, Mark ,  HORNUNG, Stephen ,  REEVE, Michael, Harry

Inventor： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

IPC: G02B06/28

CPC classification number: G02B6/14 ,  G02B6/4286 ,  G02B6/4289

Abstract: A coupling device couples low power levels of optical radiation out of an optical fibre (3) for maintenance and fault-finding purposes. The assembled coupling device acts to clamp a fibre (3), with its primary plastics coating still in place, against the inner side of a gently curved silica rod (1). The rod (1) is strongly waveguiding and, picking up radiation leaked from the fibre (3), directs it to a photodetector (6). The device finds particular application in optical communications systems.

Abstract translation: 耦合装置将光功率级别的光辐射从光纤（3）耦合，用于维护和故障寻找目的。 组装的联接装置用于将其主要塑料涂层的纤维（3）夹持在轻柔弯曲的二氧化硅棒（1）的内侧上。 杆（1）是强烈波导，并且拾取从纤维（3）泄漏的辐射，将其引导到光电检测器（6）。 该设备在光通信系统中发现具体应用。