公开(公告)号：AU637226B2

公开(公告)日：1993-05-20

申请号：AU7660191

申请日：1991-03-28

Applicant: BT&D TECHNOLOGIES LIMITED

Inventor： ROGER ALYN PAYNE

IPC: G02B6/26 ,  G02B6/36 ,  G02B6/38 ,  G02B6/42

公开(公告)号：ES2039461T3

公开(公告)日：1993-10-01

申请号：ES87310670

申请日：1987-12-03

Applicant: BT&D TECHNOLOGIES LIMITED

Inventor： HODGSON, MICHAEL JOHN ,  SMITH, DAVID ROBERT ,  MACDONALD, BRIAN MICHAEL ,  ABBOTT, KATHLEEN SUE

IPC: G02B6/26 ,  G02B6/00 ,  G02B6/38 ,  G02B6/42 ,  G02B6/44

公开(公告)号：AU631251B2

公开(公告)日：1992-11-19

申请号：AU6338090

申请日：1990-08-31

Applicant: BT&D TECHNOLOGIES LIMITED

Inventor： CHRISTOPHER JOHN ROWE ,  DAVID BRYAN MORTIMORE ,  IAIN JOHN WILKINSON ,  NICHOLAS EDWARD ACHURCH

IPC: C03B37/15 ,  G02B6/28

Abstract: Apparatus for fabricating fused optical fibre devices comprises a furnace provided with an electric heating element (5). A heat-distributing insert (7) is provided within the heating element (5), the heating element and the insert being sized and shaped to define a heating chamber for an optical fibre arrangement. The apparatus includes means for passing electric current through the heating element (5), and means (8) for supplying and maintaining an inert atmosphere within the heating chamber.

公开(公告)号：ES2039612T3

公开(公告)日：1993-10-01

申请号：ES88301331

申请日：1988-02-17

Applicant: BT&D TECHNOLOGIES LIMITED

Inventor： SARGOOD, STEPHEN KEITH

IPC: H01L31/10 ,  H01L31/0224 ,  H01L31/103 ,  H01L31/18

Abstract: A planar, p-n junction device has electrical contact made to the active region, the capping layer (4) having been selectively removed through a mask (5, 6). The selective removal of the capping layer may be performed prior to a diffusion step in which the junction is formed, or the dopant may be diffused through the capping layer (4) and the selective removal performed subsequently. In the latter instance the capping layer (4) is preferably etched through a second mask (8,9) having a smaller window (9) in register with the window (6) in the mask layer (5) which is used for the diffusion stage. The device finds particular application as a photodiode detector in optical communications.

公开(公告)号：WO1990008411A1

公开(公告)日：1990-07-26

申请号：PCT/GB1990000055

申请日：1990-01-15

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY ,  BT & D TECHNOLOGIES LIMITED ,  DEVLIN, William, John ,  COOPER, David, Martin ,  SPURDENS, Paul, Charles ,  COLE, Simon ,  LEALMAN, Ian, Francis ,  ISAAC, Joseph, James

Inventor： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY ,  BT & D TECHNOLOGIES LIMITED

IPC: H01S03/00

CPC classification number: H01S5/5009

Abstract: A semiconductor laser amplifier includes both a waveguide layer (3) and an active layer (4). In use, an optical wave in the active layer (4) interacts with the waveguiding layer to reduce the polarisation sensitivity of the amplifier. A short, thick active layer is not required, typical dimensions being 250 or 500 νm long, by 0.2 νm high. The mesa (15) is typically about 2 νm wide, but may be wider.

公开(公告)号：WO1989011676A1

公开(公告)日：1989-11-30

申请号：PCT/GB1989000565

申请日：1989-05-23

Applicant: BT&D TECHNOLOGIES LIMITED ,  SHAW, Robert, Norman

Inventor： BT&D TECHNOLOGIES LIMITED

IPC: G02F01/29

CPC classification number: G02F1/2255 ,  G02F1/3134 ,  G02F2203/21

Abstract: In electro-optic waveguide devices such as directional couplers and Mach-Zehnder interferometers having travelling-wave electrodes which overlie the waveguides, temperature sensitivity is reduced by arranging the ground plane electrode to overlie only part of the width of its associated waveguide portion. The invention has particular application to z-cut lithium niobate.

公开(公告)号：WO1988010018A1

公开(公告)日：1988-12-15

申请号：PCT/GB1988000429

申请日：1988-06-01

Applicant: BT&D TECHNOLOGIES LIMITED

Inventor： BT&D TECHNOLOGIES LIMITED ,  MUSK, Robert, William

IPC: H01S03/02

CPC classification number: G02B6/4295 ,  G02B6/4204 ,  H01S5/0071 ,  H01S5/02252 ,  H01S5/02284 ,  H01S5/0683

Abstract: An optical transmitter assembly (1) comprises an optical source (10) and an optical detector (20) arranged to receive light output from the source (10) indirectly via a deformable reflector (30). This allows tuning of the detector output power with respect to the optical output of the source or the optical power coupled into the transmission fibre (50). The source (10), the detector (20) and the reflector (30) are mounted on a common support structure (40).

公开(公告)号：WO1994021997A1

公开(公告)日：1994-09-29

申请号：PCT/GB1994000571

申请日：1994-03-21

Applicant: BT & D TECHNOLOGIES LIMITED ,  SIMMONS, Timothy, John ,  HARKER, Andrew, Thomas ,  FAKE, Michael

Inventor： BT & D TECHNOLOGIES LIMITED

IPC: G01M11/00

CPC classification number: A61B18/20 ,  A61B2018/00636 ,  G01M11/31

Abstract: High powered optoelectronic devices are continuously monitored to detect potentially dangerous default conditions in the transmission channel to which the signal generators are connected. The monitoring comprises continuously measuring the level of signals reflected from the optical transmission channel and performing corrective action when the level of said reflected signals suddenly changes. Preferably the monitoring comprises comparing the absolute level of a proportion of the reflected signals with the absolute level of a portion of the output of the signal generator. The absolute level of reflected signals will depend upon the power input into the channel and the level of reflected signals will rise if the input power rises. It is therefore desirable to take the input power into account in assessing whether or not a default condition exists.

Abstract translation: 连续监控高功率光电子器件，以检测信号发生器所连接的传输通道中的潜在危险的默认条件。 该监视包括连续测量从光传输通道反射的信号的电平，并且当所述反射信号的电平突然变化时执行校正动作。 优选地，监视包括将反射信号的一部分的绝对电平与信号发生器的输出的一部分的绝对电平进行比较。 反射信号的绝对电平将取决于输入到通道中的功率，如果输入功率上升，反射信号的电平将上升。 因此，在评估是否存在默认条件时考虑输入功率。

公开(公告)号：WO1991006022A1

公开(公告)日：1991-05-02

申请号：PCT/GB1990001583

申请日：1990-10-12

Applicant: BT&D TECHNOLOGIES LIMITED ,  MUSK, Robert, William

Inventor： BT&D TECHNOLOGIES LIMITED

IPC: G02B06/36

CPC classification number: G02B7/023 ,  F16M11/043 ,  F16M11/12 ,  G02B6/3656 ,  G02B6/3684 ,  G02B6/3805 ,  G02B6/4226

Abstract: A lens mount (1) for a miniature optical lens (6) comprises a frame (2, 3) capable of plastic deformation in and parallel to its major plane (U-D & L-R). Movement out of the plane (B-F) may also be provided for. This arrangement allows minor re-adjustments to optical lens alignment to be performed after assembly.

Abstract translation: 用于微型光学透镜（6）的透镜支架（1）包括能够塑性变形并平行于其主平面（U-D和L-R）的框架（2,3）。 也可以提供飞机外的移动（B-F）。 这种布置允许在组装之后执行对光学透镜对准的轻微的重新调整。

公开(公告)号：WO1995035590A1

公开(公告)日：1995-12-28

申请号：PCT/GB1995001407

申请日：1995-06-16

Applicant: BT & D TECHNOLOGIES LIMITED ,  HARKER, Andrew, Thomas

Inventor： BT & D TECHNOLOGIES LIMITED

IPC: H01S03/06

CPC classification number: H01S3/06704 ,  G02B6/2746 ,  G02B6/4246 ,  G02F1/093 ,  H01S3/06754 ,  H01S3/0941

Abstract: A packaged optical amplifier assembly includes an erbium doped silica based optical amplifying fibre (330) co-pumped and counter-pumped by a pair of laser diodes (336) as optical pumps. The optical pumps (336) are each coupled to an end (332, 340) of the fibre (330) by reflection from a dichroic mirror (328), the optical signal being collimated and arranged to propagate unguided between the input (306) and the first end (332), and the second end (340) and the output (346), and optical pump light from each optical pump (336) being collimated and arranged to propagate unguided between the optical pump (336) and the end of the fibre (332, 340) to which it is coupled.

Abstract translation: 封装的光放大器组件包括由作为光泵的一对激光二极管（336）共同泵浦和反相泵浦的掺铒二氧化硅基光学放大光纤（330）。 光泵（336）各自通过来自分色镜（328）的反射而耦合到光纤（330）的端部（332,340），该光信号被准直和布置成在输入（306）和 第一端（332）和第二端（340）和输出端（346），并且来自每个光泵（336）的光泵浦光被准直和布置成在光泵（336）和光泵 与其耦合的光纤（332,340）。