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1. 发明授权

US5436749A Method and apparatus for predistortion 失效
标题翻译：预失真的方法和装置
公开(公告)号：US5436749A
公开(公告)日：1995-07-25
申请号：US805251
申请日：1991-12-09
申请人： Rezin E. Pidgeon, Jr. , Heather H. Rand
发明人： Rezin E. Pidgeon, Jr. , Heather H. Rand
IPC分类号： H04B10/18 , H04B10/00 , H04B10/04
CPC分类号： H04B10/2507
摘要： A predistortion circuit for an optical communications system includes a main path for an RF modulating signal and a predistortion path for a predistortion signal, which signals are combined to modulate a laser diode. The distortion path includes a distortion generator which generates a distortion signal which is substantially the same as the distortion generated by the modulation of the transmission system with the RF modulating signals. In one implementation, the distortion generator comprises a square law device which preferably is a field effect type device. The square law device operational characteristic closely mimics the major component of distortion in optical communications systems, composite second order (CSO) distortion. In a second implementation, two square law devices are coupled in an anti-phase arrangement to substantially cancel odd order distortion components from the distortion signal and to enhance even order distortion components, particularly CSO. Another implementation illustrates a dual output distortion generator which allows for the selection of either an in phase or inverted phase distortion signal to be able to compensate for sublinear and superlinear laser diode curves without a separate phase inverter. Still another implementation of the predistortion circuit provides for the independent amplitude adjustment of different bands of the CATV spectrum to permit compensation for different channel loadings, channel spacings and channel amplitudes.
摘要翻译：用于光通信系统的预失真电路包括用于RF调制信号的主路径和用于预失真信号的预失真路径，该信号被组合以调制激光二极管。失真路径包括失真发生器，其产生与通过RF调制信号的传输系统的调制产生的失真基本相同的失真信号。在一个实现中，失真发生器包括平方律装置，其优选地是场效应型装置。平方律设备的操作特性极大地模拟了光通信系统失真的主要组成部分，复合二阶（CSO）失真。在第二实施例中，两个平方律装置以反相布置耦合，以从失真信号基本上消除奇数阶失真分量，并增强偶数阶失真分量，特别是CSO。另一个实施例示出了双输出失真发生器，其允许选择同相或反相失真信号，以便能够补偿没有单独的相位逆变器的亚线性和超线性激光二极管曲线。预失真电路的另一个实施方案提供了CATV频谱的不同频带的独立幅度调整，以允许补偿不同的信道负载，信道间隔和信道幅度。

2. 发明授权

US06185232B2 Wavelength modulated laser for minimizing effects of Rayleigh backscattering 失效
标题翻译：波长调制激光，用于最小化瑞利后向散射的影响
公开(公告)号：US06185232B2
公开(公告)日：2001-02-06
申请号：US09107428
申请日：1998-06-30
申请人： Doren W. Hess, Jr. , Rezin E. Pidgeon, Jr.
发明人： Doren W. Hess, Jr. , Rezin E. Pidgeon, Jr.
IPC分类号： H01S310
CPC分类号： H01S5/06258 , H01S5/0261 , H01S5/0612
摘要： An optical transmitter (405) includes a distributed feedback semiconductor laser (100) operated in a linear regime below a threshold associated with stimulated Brillouin scattering to generate an optical signal. A resistor (125) or other heater is physically coupled to the semiconductor laser (100), and a modulated current source (120) drives the resistor (125) with a triangle waveform (300), thereby varying an optical wavelength of the optical signal such that the optical signal and a double Rayleigh backscattered signal are characterized, at the optical receiver (410), by different optical frequencies. As a result, interference generated by Rayleigh backscattering is minimized at the optical receiver (410).
摘要翻译：光发射机（405）包括分布反馈半导体激光器（100），其以与受激布里渊散射相关联的阈值以下的线性状态操作，以产生光信号。电阻器（125）或其他加热器物理耦合到半导体激光器（100），并且调制电流源（120）用三角波形（300）驱动电阻器（125），从而改变光信号的光波长使得光信号和双瑞利反向散射信号在光接收器（410）处被不同的光频率表征。结果，由Rayleigh后向散射产生的干扰在光接收器（410）处被最小化。

3. 发明授权

US5140603A Overmodulation protection for amplitude modulated laser diode 失效
标题翻译：调幅激光二极管的过调制保护
公开(公告)号：US5140603A
公开(公告)日：1992-08-18
申请号：US518024
申请日：1990-05-02
申请人： Wayne Anderson, Jr. , Frederick T. Zenda , Rezin E. Pidgeon, Jr. , Grover Martin
发明人： Wayne Anderson, Jr. , Frederick T. Zenda , Rezin E. Pidgeon, Jr. , Grover Martin
IPC分类号： H01S5/062 , H01S5/068 , H01S5/0683 , H02H7/20
CPC分类号： H02H7/20 , H01S5/06825 , H01S5/06213 , H01S5/06808 , H01S5/06812 , H01S5/06832
摘要： A laser diode protection circuit which monitors the r.f. modulation level of the input modulating signal to the laser diode and disconnects the laser diode from the r.f. modulating signal when it exceeds an acceptable level. The circuit further monitors the output of the d.c. power supply which provides the d.c. bias current to the laser diode. The circuit disconnects the laser diode from the r.f. modulating signal when the output of the power supply falls below an acceptable level.
摘要翻译：一个激光二极管保护电路，用于监视r.f. 输入调制信号到激光二极管的调制电平，并将激光二极管从r.f. 调制信号超过可接受的电平时。电路进一步监视直流电的输出。提供直流电源偏置电流到激光二极管。电路将激光二极管与r.f. 当电源的输出低于可接受的电平时调制信号。

4. 发明授权

US4965534A Channel frequency generator for use with a multi-frequency output generator 失效
标题翻译：用于多频输出发生器的通道频率发生器
公开(公告)号：US4965534A
公开(公告)日：1990-10-23
申请号：US354277
申请日：1989-05-19
申请人： Larry S. McKinney , Rezin E. Pidgeon, Jr.
发明人： Larry S. McKinney , Rezin E. Pidgeon, Jr.
IPC分类号： H03C3/00 , H03D7/16 , H04N7/10
CPC分类号： H03D7/163 , H04N7/10
摘要： An apparatus and method is disclosed which phase locks a frequency-agile modulated output signal to any selected channel of a comb generated output. The phase error of an input signal is tracked, the input signal is modulated up to a carrier output frequency, and the modulated output frequency is locked to the comb generator output by subtracting the input signal and negating the phase error.
摘要翻译：公开了一种装置和方法，其将频率敏捷调制输出信号相位锁定到梳状生成输出的任何选定通道。跟踪输入信号的相位误差，将输入信号调制到载波输出频率，并通过减去输入信号并消除相位误差将调制输出频率锁定到梳状发生器输出。

5. 发明授权

US4912721A Cable television spread spectrum data transmission apparatus 失效
标题翻译：有线电视扩频数据传输装置
公开(公告)号：US4912721A
公开(公告)日：1990-03-27
申请号：US188478
申请日：1988-04-29
申请人： Rezin E. Pidgeon, Jr. , Frederick T. Zendt , Leo J. Thompson
发明人： Rezin E. Pidgeon, Jr. , Frederick T. Zendt , Leo J. Thompson
IPC分类号： H04B1/707 , H04N7/173
CPC分类号： H04N7/17309 , H04B1/70712
摘要： Apparatus for transmitting data spread across at least a portion of the bandwidth of a cable television channel comprises a carrier signal oscillator, a frequency divider, a pseudorandom sequence generator and two exclusive OR gates. A first exclusive OR gate serves to spread a data signal across the pseudorandom noise sequence generator having a much higher chip rate than the bit rate of the data signal. The second exclusive OR gate modulates the spread spectrum data signal to a carrier frequency for transmission over the cable television channel. The apparatus may be applied for return path transmission in the 0-30 megahertz band which is high susceptible to interference noise and provides approximately a 20 dB signal to interference ratio advantage over known data coding and transmission schemes. A microprocessor normally present in a cable television terminal may format data for transmission, control the spread spectrum modulation process and control gain control circuitry for introducing an appropriate power level into the cable plant.
摘要翻译：用于发送跨越有线电视频道的至少一部分带宽的数据的装置包括载波信号振荡器，分频器，伪随机序列发生器和两个异或门。第一异或门用于跨越伪随机噪声序列发生器扩展数据信号，其具有比数据信号的比特率高得多的码片速率。第二异或门将扩展频谱数据信号调制为载波频率，以通过有线电视频道进行传输。该装置可以应用于0-30兆赫兹频带中的返回路径传输，其高度易受干扰噪声影响，并且比已知数据编码和传输方案提供大约20dB的信号与干扰比优势。通常存在于有线电视终端中的微处理器可以格式化用于传输的数据，控制扩频调制过程和控制增益控制电路，以将适当的功率电平引入电缆设备。

6. 发明授权

US06204718B1 Method and apparatus for generating second-order predistortion without third-order distortion 有权
标题翻译：用于产生没有三阶失真的二阶预失真的方法和装置
公开(公告)号：US06204718B1
公开(公告)日：2001-03-20
申请号：US09337029
申请日：1999-06-25
申请人： Rezin E. Pidgeon, Jr.
发明人： Rezin E. Pidgeon, Jr.
IPC分类号： H03K508
CPC分类号： H04B10/2507 , H03F1/3276
摘要： An embodiment includes an input node, a shunt impedance electrically connected to the input node, and at least one shunt diode connected in series with the shunt impedance. The input node receives an electrical signal from a signal generator. A bias current is applied to the shunt diode from a bias supply. In response, the shunt diode generates second-order distortion and substantially no third-order distortion. The level of bias current is adjusted to substantially eliminate any third-order distortion while the shunt impedance is adjusted so that the appropriate amount of second-order distortion is generated as predistortion. The predistortion is then provided to a nonlinear device, such as a laser, where it operates to substantially cancel inherent distortion generated by the nonlinear device.
摘要翻译：实施例包括输入节点，电连接到输入节点的分流阻抗以及与分流阻抗串联连接的至少一个并联二极管。输入节点从信号发生器接收电信号。偏置电流从偏置电源施加到并联二极管。作为响应，并联二极管产生二阶失真并且基本上没有三阶失真。调节偏置电流的电平以便基本上消除任何三阶失真，同时调节分流阻抗，使得产生适当量的二阶失真作为预失真。然后将预失真提供给诸如激光器的非线性装置，其中其操作以基本上消除由非线性装置产生的固有失真。

7. 发明授权

US5963352A Linearization enhanced operation of single-stage and dual-stage electro-optic modulators 失效
标题翻译：单级和双级电光调制器的线性化增强操作
公开(公告)号：US5963352A
公开(公告)日：1999-10-05
申请号：US804424
申请日：1997-02-21
申请人： Dogan A. Atlas , Rezin E. Pidgeon, Jr. , Frank R. Little
发明人： Dogan A. Atlas , Rezin E. Pidgeon, Jr. , Frank R. Little
IPC分类号： H04B10/155 , H04B10/18 , H04B10/04
CPC分类号： H04B10/505 , H04B10/5051 , H04B10/58
摘要： A distortion circuit for linearizing third-, fifth- and seventh-order distortion components in a non-linear optical communications system includes at least one group of series connected diodes coupled to a common input terminal for receiving a signal source at one end and to an inductor and a capacitor at the other end, a resistance coupled to the common input terminal and a bias source for providing a bias current to the group of series connected diodes. The distortion circuit may be implemented as a predistortion circuit in the headend of the optical communications system or as a postdistortion circuit at the receiving end.
摘要翻译：用于线性化非线性光通信系统中的第三，第五和第七阶失真分量的失真电路包括耦合到公共输入端的至少一组串联连接的二极管，用于在一端接收信号源电感器和另一端的电容器，耦合到公共输入端子的电阻和用于向串联连接的二极管组提供偏置电流的偏置源。失真电路可以实现为光通信系统的前端中的预失真电路或者在接收端的后失真电路。

8. 发明授权

US5379141A Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links 失效
标题翻译：通过光链路传输宽带幅度调制射频信号的方法和装置
公开(公告)号：US5379141A
公开(公告)日：1995-01-03
申请号：US998208
申请日：1992-12-30
申请人： Leo Thompson , Frank Little , Rezin E. Pidgeon, Jr.
发明人： Leo Thompson , Frank Little , Rezin E. Pidgeon, Jr.
IPC分类号： H04J14/00 , H04B10/155 , H04J1/00 , H04J14/02 , H04N7/22
CPC分类号： H04N7/22 , H04B10/504 , H04B10/506 , H04J14/0298
摘要： An optical communications system including a plurality of modulated radio frequency carriers which span more than an octave in bandwidth. In one implementation, the carriers are grouped into ranges which span less than an octave in bandwidth and the individual groups are transmitted over unique optical links. In another implementation, the groups are multiplexed on one optical link by using different wavelengths. In still another implementation, several of the bands are up-converted to the highest band of interest and then transmitted, either over single or multiple links. The resulting optical signals are demodulated and then down-converted before they are recombined into the broadband signal in excess of an octave in bandwidth.
摘要翻译：一种光通信系统，包括跨越多于八度的带宽的多个调制射频载波。在一个实现中，载波被分组到跨越小于宽带的八度的范围，并且各个组通过唯一的光链路传输。在另一实现中，通过使用不同的波长在一个光链路上复用组。在又一个实现中，若干频带被上转换成最高感兴趣的频带，然后通过单个或多个链路传输。所得到的光信号在它们被重新组合成超过带宽八度的宽带信号之前被解调然后被下变频。

9. 发明授权

US5500758A Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links 失效
公开(公告)号：US5500758A
公开(公告)日：1996-03-19
申请号：US321234
申请日：1994-10-11
申请人： Leo Thompson , Frank Little , Rezin E. Pidgeon, Jr.
发明人： Leo Thompson , Frank Little , Rezin E. Pidgeon, Jr.
IPC分类号： H04J14/00 , H04B10/155 , H04J1/00 , H04J14/02 , H04N7/22 , H04B10/06
CPC分类号： H04N7/22 , H04B10/504 , H04B10/506 , H04J14/0298
摘要： An optical communications system including a plurality of modulated radio frequency carriers which span more than an octave in bandwidth. In one implementation, the carriers are grouped into ranges which span less than an octave in bandwidth and the individual groups are transmitted over unique optical links. In another implementation, the groups are multiplexed on one optical link by using different wavelengths. In still another implementation, several of the bands are up-converted to the highest band of interest and then transmitted, either over single or multiple links. The resulting optical signals are demodulated and then down-converted before they are recombined into the broadband signal in excess of an octave in bandwidth.

10. 发明授权

US5471492A Broadband matching network 失效
标题翻译：宽带匹配网络
公开(公告)号：US5471492A
公开(公告)日：1995-11-28
申请号：US983754
申请日：1992-12-01
申请人： Rezin E. Pidgeon, Jr. , Grover H. Martin
发明人： Rezin E. Pidgeon, Jr. , Grover H. Martin
IPC分类号： H01S5/042 , H01S3/00
CPC分类号： H01S5/042
摘要： A broadband matching network closely matches the output impedance of a broadband amplifier to the input impedance of a laser over a broad frequency band to facilitate efficient transfer of power therebetween. As a result, the broadband amplifier does not have to generate high output power levels that cause intermodulation distortion. The matching network includes a pair of matching transformers having toroidal cores and a filter circuit.
摘要翻译：宽带匹配网络将宽带放大器的输出阻抗与宽频带上的激光器的输入阻抗紧密匹配，以便有效地传输其间的功率。结果，宽带放大器不必产生引起互调失真的高输出功率电平。匹配网络包括一对具有环形磁芯的匹配变压器和滤波电路。

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