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公开(公告)号：US4946245A
公开(公告)日：1990-08-07
申请号：US358331
申请日：1989-05-17
CPC分类号： G02B6/4246 , G02B6/02085 , G02B6/29311 , G02B6/29323 , G02F1/011 , G02F1/0115 , G02F2201/302 , G02F2203/055
摘要： An optical filter includes a volume diffraction grating provided within a waveguide. The grating has a thickness T sufficient such that when an optical beam R is incident on the grating from outside the waveguide, wavelengths at or near the Bragg wavelength for the grating are diffracted and coupled into the waveguide, all but the first order interferences being substantially eliminated, while wavelengths away from the Bragg wavelength pass through the waveguide substantially undiffracted. The grating pitch L may be varied to permit tuning of the filter response.
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2.发明授权
公开(公告)号：US5241409A
公开(公告)日：1993-08-31
申请号：US721559
申请日：1991-08-05
申请人： Alan M. Hill , David B. Payne
发明人： Alan M. Hill , David B. Payne
CPC分类号： H04Q11/0001
摘要： A communications network in which a central switching node (70) has at least two sets of both input ports (52) and output ports (56) coupled to respective sets of transmitters (T.sub.ij) and receivers (R.sub.ij) by passive optical networks (54) and (58) and demultiplexers (52) and multiplexers (59). The transmitters (T.sub.ij) are tunable so that each can be selectively the input ports (52). The receivers (R.sub.ij) are also tunable so the output ports (56) can be selectively coupled to the one or more of the receivers (R.sub.ij). Alternatively, the demultiplexers (55) and multiplexers (59) can be tunable. This devolves some of the switching function outside the central switching node (50) thereby reducing the component count.
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公开(公告)号：US5305402A
公开(公告)日：1994-04-19
申请号：US930683
申请日：1992-10-06
申请人： Alan M. Hill , David B. Payne , Kevin J. Blyth
发明人： Alan M. Hill , David B. Payne , Kevin J. Blyth
CPC分类号： G02B6/2931 , G02B6/29313 , G02B6/2938 , G02B6/29395
摘要： A tunable optical filter includes an array of optical fibre located within a capillary tube and mounted on a solenoid movable support and positioned in front of a lens and diffration grating. The filter provides simultaneous tuning filtering between fibres. By coupling fibres to a ring laser and fibre to an optical receiver simultaneous tuning of a laser and receiver is possible. The filter finds particular application in passive optical networks.
摘要翻译： PCT No.PCT / GB91 / 00264 Sec。 371日期：1992年10月6日 102（e）日期1992年10月6日PCT 1991年2月20日PCT PCT。 公开号WO91 / 13377 日期1991年9月5日。可调谐滤光器包括位于毛细管内并安装在螺线管可移动支架上并位于透镜和扩散光栅前面的光纤阵列。 滤波器提供光纤之间的同步调谐滤波。 通过将光纤耦合到环形激光器和光纤到光学接收器，可以同时调谐激光器和接收器。 滤波器在无源光网络中具有特殊应用。
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公开(公告)号：US5010586A
公开(公告)日：1991-04-23
申请号：US288251
申请日：1988-12-13
申请人： David B. Mortimore , David B. Payne
发明人： David B. Mortimore , David B. Payne
IPC分类号： H04B10/2587
CPC分类号： H04B10/2587
摘要： A two way transmission system has a source at one terminal and a fibre loop at the other terminal. Conventional modulation techniques are used at the terminal with the source, whereas at the other terminal modulation is achieved by modulation of the birefringence of the loop.
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公开(公告)号：US20090262759A1
公开(公告)日：2009-10-22
申请号：US12303439
申请日：2007-06-04
IPC分类号： H04J3/06
CPC分类号： H04J3/0614 , H04J14/0226 , H04J14/0247 , H04J14/0252 , H04J14/0282 , H04J2014/0253 , H04L7/0008 , H04L7/0075
摘要： The present invention relates to communication, in particular to communication involving analogue-like signals that are multiplexed together. There is provided a method of communicating with a plurality of devices, each of which of which provides a signal whose amplitude varies in an analogue fashion, the method including the steps of: temporally interleaving the signals from the devices so as to form a multiplexed signal having a plurality of sequential pulses, which pulses can, in an analogue fashion, each have an amplitude within a continuous range, each pulse originating from a respective device, and each pulse having a plurality of temporal portions; and, forming a synchronisation signal within the multiplexed signal for demultiplexing the multiplexed signal, the synchronisation signal being formed by reducing the amplitude within a temporal portion of at least some of the pulses.
摘要翻译： 本发明涉及通信，特别涉及涉及一起被多路复用的类似模拟信号的通信。 提供了一种与多个设备进行通信的方法，每个设备中的每一个设备以模拟方式提供其幅度变化的信号，该方法包括以下步骤：在时间上交织来自设备的信号以便形成复用信号 具有多个顺序脉冲，这些脉冲可以以模拟方式各自具有在连续范围内的幅度，每个脉冲源自相应的装置，每个脉冲具有多个时间部分; 并且在所述多路复用信号内形成同步信号以解复用多路复用信号，所述同步信号通过减小至少一些脉冲的时间部分内的振幅而形成。
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公开(公告)号：US4839898A
公开(公告)日：1989-06-13
申请号：US148660
申请日：1988-01-25
申请人： David B. Payne , David B. Mortimore
发明人： David B. Payne , David B. Mortimore
CPC分类号： H01S3/067 , H01S3/08 , H01S3/08059 , G02F2001/211
摘要： An optical fiber laser comprises an optical resonant cavity defined by an optical fiber (1). First and second reflectors (8, 13; 14, 19) are optically coupled with respective ends of the fibre. The first reflector is adapted to reflect radiation at the lasing wavelength and the second reflector to be partially transparent to radiation at the lasing wavelength. Each reflector comprises a directional coupler (8; 14) having first and second pairs of ports. One each of the one pair of ports (11; 16) of each coupler (8; 14) is optically coupled with the cavity (1) while both ports of the other pair (9, 10; 17,18) are coupled with a respective loop of optical fibre (13, 19). The remaining port (12) of one coupler (8) is connected with a source of pumping radiation (6), and the remaining port (15) of the other coupler (14), is available to output laser radiation.
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公开(公告)号：US4452506A
公开(公告)日：1984-06-05
申请号：US211049
申请日：1980-11-28
CPC分类号： G02B6/3803 , Y10S359/90
摘要： A pair of optical fibres which are to be joined are located with their end portions in coupling elements one of which is transparent to light. The coupling elements are located such that the ends of the fibres are in approximate alignment. Light is transmitted along one fibre so that it is received by the fibre in the transparent coupling element. Light which is not coupled into the core of the fibre is sensed by a sensor and the relative position of the fibres is adjusted until the level of sensed light is a minimum. The sensing of the light is carried out at positions spaced angularly about the waveguide so that an indication of the direction of any misalignment is obtained. The coupling elements are then secured in this position. The adjustment of the fibres can be carried out using a linear translation stage and a microprocessor which controls the stage in accordance with signals from the sensor.
摘要翻译： 要被接合的一对光纤的端部位于耦合元件中，其中一个光对光是透明的。 耦合元件被定位成使得纤维的端部大致对准。 光沿着一根光纤传播，使得它被透明耦合元件中的光纤接收。 未耦合到光纤的芯中的光由传感器感测，并且调节光纤的相对位置直到感测光的电平为最小。 光的感测在与波导相对角度地间隔的位置处进行，从而获得任何未对准的方向的指示。 然后将耦合元件固定在该位置。 可以使用线性平移台和微处理器来执行光纤的调节，微处理器根据来自传感器的信号控制该级。
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公开(公告)号：US5129021A
公开(公告)日：1992-07-07
申请号：US634880
申请日：1991-01-10
IPC分类号： G02B6/28
CPC分类号： G02B6/2856
摘要： An optical 1.times.N star coupler has a single mode input fibre (I) and N single mode output fibres (O.sub.1) forming an output fibre assembly. The output fibres (O) are tapered within a former (2) which holds each output fibre (O) so it is positioned substantially identically relative to the remaining output fibres. The input fibre (I) is also tapered such that the fundamental mode field of the input fibre (I) and output fibre assembly are substantially equal. The identical relative positions of the output fibres (O) provides a wavelength independent 1.times.N star coupler.
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公开(公告)号：US4900114A
公开(公告)日：1990-02-13
申请号：US116078
申请日：1987-09-29
申请人： David B. Mortimore , David B. Payne
发明人： David B. Mortimore , David B. Payne
CPC分类号： G02B6/262 , G02B6/2551
摘要： A technique for reducing splice loss between similar or dissimilar optical fibres. Two fibers (10,11) are joined by fusion splicing and the joint region is tapered until the cladding assumes a guiding function. This produces a mode transformer which covers the fundamental mode of one fibre to that of the other with little or negligible loss.
摘要翻译： PCT No.PCT / GB87 / 00109 Sec。 371日期1987年9月29日第 102（e）1987年9月29日PCT PCT 1987年2月13日PCT公布。 公开号WO87 / 05118 日期1987年8月27日。一种用于减少相似或不同光纤之间的接头损耗的技术。 两根纤维（10,11）通过熔接接合，并且接合区域是渐缩的，直到包层呈现引导功能为止。 这产生一种模式变压器，其将一根光纤的基本模式覆盖到另一根光纤的基本模式，其损耗很小或可忽略不计。
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公开(公告)号：US4497536A
公开(公告)日：1985-02-05
申请号：US497219
申请日：1983-05-27
申请人： David B. Payne , Colin A. Millar
发明人： David B. Payne , Colin A. Millar
CPC分类号： G02B6/3841 , G02B6/2552 , G02B6/262 , G02B6/2817 , G02B6/32 , G02B6/3825 , G02B6/3874 , G02B6/3827 , G02B6/3829
摘要： A technique for aligning and coupling dielectric optical waveguides comprises threading the end of a waveguide through the central opening of a triad ball connector and forming by fusion a generally spherical glass bead on the end of the waveguide using, for example, an electric arc. The waveguide is then drawn back so that the bead contacts the balls of the triad connector to accurately locate the waveguide. The bead acts as a locating element and also has beneficial focussing properties.
摘要翻译： 用于对准和耦合电介质光波导的技术包括将波导的端部穿过三联形球连接器的中心孔，并通过使用例如电弧在波导端部上的大致球形的玻璃珠熔合而形成。 然后将波导拉回，使得珠与三单元连接器的球接触以精确地定位波导。 珠作为定位元件，并且还具有有益的聚焦特性。
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