公开(公告)号：EP1946175A1

公开(公告)日：2008-07-23

申请号：EP06794828.1

申请日：2006-10-19

申请人： QinetiQ Limited

发明人： SCOTT, Andrew, Maxwell ,  MCNIE, Mark, Edward ,  BRUNSON, Kevin, Michael

IPC分类号： G02B26/00

CPC分类号： G02B26/001

摘要： An optical modulator comprising a spacing-controllable etalon having at least one sprung micro- mirror suspended above a substrate. At least one electrically insulating stop is provided between the micro-mirror and the substrate to avoid short-circuit when the micro-mirror is drawn towards the substrate by an applied voltage. An optical detector detects the time of arrival of a first laser pulse. A control circuit predicts from this an arrival time of the next incident laser pulse and, responsive to a control signal, either retains the micro-mirror in its pulled-down state held against the insulating stops or releases the micro-mirror at a time predicted to maximise or minimise the light transmitted through the modulator. After a time interval calculated to permit a predetermined number of mechanical oscillations, the micro-mirror is pulled back down onto the stops.

公开(公告)号：EP1938481A1

公开(公告)日：2008-07-02

申请号：EP06794837.2

申请日：2006-10-19

申请人： QinetiQ Limited

发明人： LEWIN, Andrew, Charles ,  STONE, Steven, Matthew ,  SCOTT, Andrew, Maxwell

IPC分类号： H04B10/26 ,  H04L7/00

CPC分类号： H04L7/0091 ,  H04B10/2587 ,  H04L7/0075

摘要： A method of synchronising an optical transmitter and modulator comprising transmitting a calibration sequence of pulses from the transmitter to the modulator; varying a control timing drawn from the set comprising the transmit interval timings and the modulator transmission interval timings; monitoring the resulting pulses transmitted by the modulator and selecting a preferred control timing; controlling the optical transmitter and/or modulator responsive to the selected control timing. Corresponding apparatus, systems, signals and programs for computers to implement or control the arrangement are also provided.

摘要翻译： 光发射器和调制器包括：发送从发送器到所述调制器的脉冲的校准序列的同步伊辛的方法; 改变从所述一组包括的发送时间间隔定时和所述调制器发送间隔定时绘制的控制定时; 监测所得的反式脉冲通过mitted调制器和选择首选的控制定时; 控制响应于所选择的控制时刻的光发射器和/或调制器。 因此对于计算机能够执行或控制装置相应的装置，系统，信号以及程序提供。

公开(公告)号：EP1946168A2

公开(公告)日：2008-07-23

申请号：EP06794823.2

申请日：2006-10-19

申请人： QinetiQ Limited

发明人： SCOTT, Andrew, Maxwell ,  LEWIN, Andrew, Charles ,  RIDLEY, Kevin, Dennis

IPC分类号： G02B6/38 ,  G01B11/26

CPC分类号： G01B11/26

摘要： Apparatus and methods for detecting angle of incidence of an optical beam. The apparatus employs two optical detectors, the first of which has placed in front of it a coating or layer which exhibits an angle-dependent optical transmission characteristic distinct from that of the light path in front of the second detector. The difference in a characteristic of the light received at the respective detectors therefore provides an indication of the angle of incidence of the light beam. The angle detector may be used particularly, though not exclusively, in conjunction with free space optical communications systems.

公开(公告)号：EP1938481B1

公开(公告)日：2017-08-09

申请号：EP06794837.2

申请日：2006-10-19

申请人： QinetiQ Limited

发明人： LEWIN, Andrew, Charles ,  STONE, Steven, Matthew ,  SCOTT, Andrew, Maxwell

IPC分类号： H04B10/2587 ,  H04L7/00

CPC分类号： H04L7/0091 ,  H04B10/2587 ,  H04L7/0075

公开(公告)号：EP1946465B1

公开(公告)日：2014-06-18

申请号：EP06794825.7

申请日：2006-10-19

申请人： QinetiQ Limited

发明人： RIDLEY, Kevin, Dennis ,  SCOTT, Andrew, Maxwell ,  STONE, Steven, Matthew ,  LEWIN, Andrew, Charles

IPC分类号： H04B10/112

CPC分类号： H04B10/1125

公开(公告)号：EP1982218A1

公开(公告)日：2008-10-22

申请号：EP07705145.6

申请日：2007-02-06

申请人： QINETIQ LIMITED

发明人： MCNIE, Mark, Edward ,  LEWIS, Keith, Loder ,  SCOTT, Andrew, Maxwell ,  SLINGER, Christopher, William ,  BRUNSON, Kevin, Michael ,  SMITH, Gilbert, William

IPC分类号： G02B5/28 ,  G02B26/00

CPC分类号： G02B26/001 ,  G02B5/281 ,  G02B5/284

摘要： A micro-opto-electro-mechanical systems (MOEMS) electro optical modulator (2) having an electrically tuneable optical resonator comprising an asymmetric Fabry-Perot etalon incorporating a mirror (10) resiliency biased with respect to a substrate (13) and moveable in relation thereto in response to a voltage applied there-between. The optical modulator (2) is capable of modulating electromagnetic radiation having a plurality of wavelengths. The modulator is adapted to modulate the transmission of short wave infrared radiation (SWIR), medium wave infrared radiation (MWIR) and long wave infrared radiation (LWIR) and the reflection of visible radiation. A spatial optical modulator having a plurality of said MOEMS optical modulators (2). A method of addressing said spatial optical modulator.

摘要翻译： 一种具有电可调谐光学谐振器的微光电机械系统（MOEMS）电光调制器（2），所述电可调谐光学谐振器包括具有相对于基板（13）弹性偏置的反射镜（10）的不对称法布里 - 珀罗标准具， 响应于施加于其间的电压而与其关联。 光调制器（2）能够调制具有多个波长的电磁辐射。 调制器适用于调制短波红外辐射（SWIR），中波红外辐射（MWIR）和长波红外辐射（LWIR）的传输以及可见辐射的反射。 一种具有多个所述MOEMS光调制器（2）的空间光调制器。 一种寻址所述空间光调制器的方法。

公开(公告)号：EP1946465A1

公开(公告)日：2008-07-23

申请号：EP06794825.7

申请日：2006-10-19

申请人： QinetiQ Limited

发明人： RIDLEY, Kevin, Dennis ,  SCOTT, Andrew, Maxwell ,  STONE, Steven, Matthew ,  LEWIN, Andrew, Charles

IPC分类号： H04B10/26

CPC分类号： H04B10/1125

摘要： Methods of providing duplex free-space optical, communication comprising receiving a time-shift keying (TSK) encoded signal and selectively re-modulating—and optionally retro-reflecting —received TSK pulses so as to transmit an on-off keying (OOK) signal wherein modulation is achieved by operating a micro-opto-electronic mechanical system (MOEMS) device having a oscillation period, the difference in timing between logic 1 and logic 0 pulses of the TSK encoded signal being such that each pulse arrives at a time within a single MOEMS device oscillation period chosen to ensure high or low transmissivity through the MOEMS device independent of incident TSK encoded signal pulse value (0 or 1).