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31. 发明授权

US6167024A Multiple channel control using orthogonally modulated coded drive signals 失效
标题翻译：使用正交调制编码驱动信号的多通道控制
公开(公告)号：US6167024A
公开(公告)日：2000-12-26
申请号：US42928
申请日：1998-03-17
申请人： Eric L. Upton , Michael G. Wickham , Martin P. Smith
发明人： Eric L. Upton , Michael G. Wickham , Martin P. Smith
IPC分类号： G02B6/34 , H04J14/00 , H04B7/216
CPC分类号： H04J14/005 , H04J14/007
摘要： An orthogonal pilot tone servo controller provides a servo control loop for each tap in a delay line processor where each servo acquires its independence from the other tap's servos utilizing an orthogonal code set modulated on top of the existing tap values. The orthogonal codes are attenuated in amplitude such that the code sets are transparent to the processed signals of interest, but the code's length enables each tap's servo controller to independently recover the tap's state from the aggregate of signals and codes through processing gain realized in each loop's recovery circuit. A plurality of taps can be thus be servo controlled simultaneously, providing for extremely wide bandwidth processes which can be performed accurately with digital controls.
摘要翻译：正交导频音调伺服控制器为延迟线处理器中的每个抽头提供伺服控制回路，其中每个伺服器利用在现有抽头值顶部调制的正交码集来获取其与另一抽头的伺服的独立性。正交码在幅度上衰减，使得码集对于所处理的感兴趣的信号是透明的，但是代码的长度使得每个抽头的伺服控制器能够从信号和代码的集合中独立地恢复抽头的状态，通过每个循环中实现的处理增益恢复电路。因此，可以同时伺服控制多个抽头，从而提供可以用数字控制精确地执行的极宽带宽处理。

32. 发明授权

US5898804A Precision wavelength control for automated fiber optic Bragg grating writing 失效
标题翻译：用于自动光纤布拉格光栅写入的精确波长控制
公开(公告)号：US5898804A
公开(公告)日：1999-04-27
申请号：US868827
申请日：1997-06-09
申请人： Michael G. Wickham
发明人： Michael G. Wickham
IPC分类号： G02B6/02 , G02B6/10 , G02B6/26
CPC分类号： G02B6/02133
摘要： The present invention provides a computer controlled apparatus and method for producing high quality fiber optic Bragg gratings. According to the invention, the apparatus (10) preferably includes a laser (12) for generating an ultraviolet beam (18), a rotatable scrapper mirror (32) disposed downstream of the laser (12) for receiving the beam (18) and an optical fiber (48) disposed adjacent an edge (84) of the mirror (32) for receiving a high fringe frequency interferrogram (86) formed by the mirror (32). The mirror (32) is coupled to a rotation stage (14) for rotating the mirror (32) about a pre-selected pivot point (36) relative to the angle of incidence of the beam (18) to vary the Bragg wavelength at the fiber core.
摘要翻译：本发明提供了一种用于生产高质量光纤布拉格光栅的计算机控制装置和方法。根据本发明，设备（10）优选地包括用于产生紫外线束（18）的激光器（12），设置在激光器（12）下游以接收光束（18）的可旋转刮板镜（32）和邻近反射镜（32）的边缘（84）设置的用于接收由反射镜（32）形成的高条纹频率干涉图（86）的光纤（48）。反射镜（32）联接到旋转台（14），用于相对于光束（18）的入射角围绕预选枢轴点（36）旋转反射镜（32），以改变波导纤维芯。

33. 发明授权

US5781327A Optically efficient high dynamic range electro-optic modulator 失效
标题翻译：光效高动态范围电光调制器
公开(公告)号：US5781327A
公开(公告)日：1998-07-14
申请号：US699427
申请日：1996-08-19
申请人： John C. Brock , Michael G. Wickham
发明人： John C. Brock , Michael G. Wickham
IPC分类号： G02F1/03 , G02F1/01 , H04B1/06 , H04B10/02
CPC分类号： G02F1/0327 , G02F2203/19
摘要： An electro-optic modulator and a method for its use, in which an optical carrier is effectively suppressed for transmission of a radio-frequency (rf) modulating signal over an optical communication link, to provide improved demodulator performance. A carrier component is recovered from the modulator, amplified, and reused, to minimize the effect of optical carrier losses. In one embodiment of the invention, a modulator (10) with complementary output ports (20 and 22) generates a carrier-suppressed output (FIG. 2B) containing rf sidebands from one port (20) and a strong carrier component (FIG. 2C) from the other output port (22). The carrier component is filtered in a residual sideband filter (14), amplified in an optical amplifying medium (12) and returned to the modulator (10) as its carrier input. In a second embodiment of the invention, a modulator (30) with a single output port produces rf sidebands and a suppressed carrier component (FIG. 4A), all of which are amplified in an optical amplifying medium (32) and coupled to an optical circulator (34), which, in cooperation with a narrowband filter (36), separates the rf sidebands from the amplified carrier component, the latter being returned to the modulator (30) as the carrier input. In both embodiments, a suppressed-carrier optical signal is obtained for transmission over a communication link, but carrier losses are minimized by recovery and recirculation of the carrier. In an alternate embodiment of the invention (FIG. 5), a second modulator (40) removes any residual rf components and avoids any unwanted cavity resonance.
摘要翻译：一种电光调制器及其使用方法，其中光载波被有效地抑制用于通过光通信链路传输射频（RF）调制信号，以提供改进的解调器性能。从调制器中恢复载波分量，放大并再利用，以最大限度地减少光载波损耗的影响。在本发明的一个实施例中，具有互补输出端口（20和22）的调制器（10）产生载波抑制输出（图2B），其包含来自一个端口（20）和强载波分量（图2C）的rf边带）从另一个输出端口（22）。载波分量在剩余边带滤波器（14）中被滤波，在光放大介质（12）中被放大并作为其载波输入返回到调制器（10）。在本发明的第二实施例中，具有单个输出端口的调制器（30）产生rf边带和受抑制的载波分量（图4A），所有载波分量都在光放大介质（32）中放大并耦合到光循环器（34），其与窄带滤波器（36）协作，将rf边带与放大的载波分量分离，后者作为载波输入返回到调制器（30）。在两个实施例中，获得用于通过通信链路传输的抑制载波光信号，但通过载波的恢复和再循环来最小化载波损耗。在本发明的替代实施例（图5）中，第二调制器（40）去除任何残留的rf分量并避免任何不希望的空腔谐振。

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