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31. 发明授权

US6016371A Optical RF signal processing 失效
标题翻译：光学射频信号处理
公开(公告)号：US6016371A
公开(公告)日：2000-01-18
申请号：US994344
申请日：1997-12-19
申请人： Michael G. Wickham , Philip H. Wisseman
发明人： Michael G. Wickham , Philip H. Wisseman
IPC分类号： G02F1/01 , G02B6/28 , H04B10/04 , H04B10/06 , H04B10/142 , H04B10/152
CPC分类号： G02B6/2861
摘要： An RF optical signal processing system that can provide various filter functions by way of tapped delay lines with fiber Bragg gratings, variable weight taps, positive and negative taps and a short coherent length optical source. Such an RF optical signal processing systems is advantageous over corresponding RF electronic systems and offer the increased bandwidth and lower power consumption making the RF optical signal processing system suitable for various application such as avionics and satellite communications.
摘要翻译： RF光信号处理系统，其可以通过具有纤维布拉格光栅，可变重量抽头，正和抽头以及短相干长度光源的抽头延迟线提供各种滤波器功能。这样的RF光信号处理系统比相应的RF电子系统更有优势，并提供增加的带宽和更低的功耗，使得RF光信号处理系统适用于诸如航空电子设备和卫星通信之类的各种应用。

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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