公开(公告)号：US20050169645A1

公开(公告)日：2005-08-04

申请号：US10767376

申请日：2004-01-29

申请人： Nelson Diaz

发明人： Nelson Diaz

IPC分类号： H03K5/08 ,  H04B10/06 ,  H04B10/158

CPC分类号： H03K5/086 ,  H04B10/69

摘要： A receiver in a fiber optic system including an optical detector, an electronic circuit and an adjustment input circuit. The optical detector is configured to receive optical signals of varying light intensity. The optical detector has a dynamic range of sensitivity between a high optical intensity value and a low optical intensity value. The optical detector is also configured to convert the received optical signals into analog electrical signals proportional to the optical intensity of the optical signals. The electronic circuit is coupled to the optical detector and it is configured to receive the analog electrical signals from the optical detector. The electronic circuit also produces digital signals representative of the optical intensity of the optical signals such that the electronic circuit is configured with an original maximum digital value proportional to the high optical intensity value and an original minimum digital value proportional to the low optical intensity value. This defines an original receiver resolution between the original minimum and maximum digital values. The adjustment input circuit is coupled to the electronic circuit and is configured to allow the original maximum digital value to be adjusted to an adjusted maximum digital value. It is also configured to allow the original minimum digital value to be adjusted to an adjusted minimum digital value. This defines an adjusted receiver resolution between the adjusted minimum and maximum digital values.

摘要翻译： 包括光学检测器，电子电路和调整输入电路的光纤系统中的接收器。 光学检测器被配置为接收变化的光强度的光信号。 光学检测器具有在高光强度值和低光强度值之间的灵敏度的动态范围。 光学检测器还被配置为将接收到的光信号转换成与光信号的光强度成比例的模拟电信号。 电子电路耦合到光学检测器，并且其被配置为从光学检测器接收模拟电信号。 电子电路还产生表示光信号的光强度的数字信号，使得电子电路配置有与高光强度值成比例的原始最大数字值和与低光强度值成比例的原始最小数字值。 这定义了原始的最小和最大数字值之间的接收机分辨率。 调整输入电路耦合到电子电路，并且被配置为允许将原始最大数字值调整到调整后的最大数字值。 它还被配置为允许将原始最小数字值调整到调整的最小数字值。 这定义了调整后的最小和最大数字值之间的接收机分辨率。

公开(公告)号：US20050135729A1

公开(公告)日：2005-06-23

申请号：US11030466

申请日：2005-01-06

申请人： David Welch ,  Radhakrishnan Nagarajan ,  Fred Kish ,  Mark Missey ,  Vincent Dominic ,  Atul Mathur ,  Frank Peters ,  Charles Joyner ,  Richard Schneider ,  Ting-Kuang Chiang

发明人： David Welch ,  Radhakrishnan Nagarajan ,  Fred Kish ,  Mark Missey ,  Vincent Dominic ,  Atul Mathur ,  Frank Peters ,  Charles Joyner ,  Richard Schneider ,  Ting-Kuang Chiang

IPC分类号： G02B6/12 ,  G02B6/34 ,  G02F1/017 ,  H01S5/026 ,  H01S5/0625 ,  H01S5/0683 ,  H01S5/12 ,  H01S5/20 ,  H01S5/22 ,  H01S5/34 ,  H01S5/40 ,  H01S5/50 ,  H04B10/12 ,  H04B10/145 ,  H04B10/158 ,  H04B10/17 ,  H04J14/02

CPC分类号： H04B10/2914 ,  B82Y20/00 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/12011 ,  G02B6/12019 ,  G02B6/12023 ,  G02B6/12026 ,  G02B6/12028 ,  G02B6/1203 ,  G02B6/12033 ,  G02B6/4249 ,  G02F1/01725 ,  G02F2001/0175 ,  G02F2001/01758 ,  H01S5/026 ,  H01S5/0264 ,  H01S5/0265 ,  H01S5/0268 ,  H01S5/0425 ,  H01S5/06256 ,  H01S5/06258 ,  H01S5/0683 ,  H01S5/101 ,  H01S5/1014 ,  H01S5/12 ,  H01S5/1228 ,  H01S5/183 ,  H01S5/2077 ,  H01S5/22 ,  H01S5/2224 ,  H01S5/227 ,  H01S5/3404 ,  H01S5/3408 ,  H01S5/34306 ,  H01S5/4025 ,  H01S5/4031 ,  H01S5/4087 ,  H01S5/50 ,  H01S5/5072 ,  H04B10/25 ,  H04B10/50 ,  H04B10/675 ,  H04J14/02

摘要： An optical receiver photonic integrated circuit (RxPIC) comprises a semiconductor monolithic chip having an input to receive from an optical transmission link a combined channel signal originating from an optical transmitter source and comprising a plurality of channel signals having different wavelengths forming a wavelength grid. An optical decombiner is integrated in the chip and optically coupled to the input to receive the multiplexed channel signal and provide a decombined individual channel signal on an output waveguide of a plurality of such output waveguides provided from the optical decombiner. A plurality of photodetectors are also integrated in the chip and each photodetector is optically coupled to one of the output waveguides to receive a decombined channel signal and convert the channel signal to an electrical signal. A controller is coupled to receive a portion of the converted signals to determine at least one performance property of the signals and provide service channel signal as feedback about that property via the semiconductor monolithic chip to the optical transmitter source. The controller is coupled to an integrated optical service channel (OSC) on the chip that has a light source which is modulated by the service channel signal. The light source may be integrated on the chip. The optical service channel (OSC) is coupled as an input to the decombiner for transport off the chip to optical transmitter source. If there is an optical amplifier at the input of the chip, the service channel signai will be amplified by that amplifier. Such an optical amplifier may be an off-chip rare earth doped amplifier or an on-chip semiconductor optical amplifier.

摘要翻译： 光接收器光子集成电路（RxPIC）包括半导体单片芯片，其具有从光传输链路接收源自光发射机源的组合信道信号的输入，并且包括具有形成波长网格的不同波长的多个信道信号。 光学分解器集成在芯片中并且光耦合到输入端以接收多路复用的信道信号，并且在由光学分解器提供的多个这样的输出波导的输出波导上提供去重组的单独信道信号。 多个光电检测器也集成在芯片中，并且每个光电检测器光耦合到输出波导中的一个，以接收解复用通道信号并将通道信号转换为电信号。 控制器被耦合以接收转换信号的一部分以确定信号的至少一个性能特性，并且将服务信道信号作为关于经由半导体单芯片到光发射机源的属性的反馈提供。 控制器耦合到芯片上的集成光学服务信道（OSC），其具有由服务信道信号调制的光源。 光源可以集成在芯片上。 光服务信道（OSC）作为输入端耦合到分解器，用于从芯片传输到光发射机源。 如果在芯片输入端有一个光放大器，则该放大器将放大服务通道信号。 这种光放大器可以是片外稀土掺杂放大器或片上半导体光放大器。

公开(公告)号：US20050047802A1

公开(公告)日：2005-03-03

申请号：US10653317

申请日：2003-09-02

申请人： Lonnie Jaynes ,  Jerry Wood

发明人： Lonnie Jaynes ,  Jerry Wood

IPC分类号： H04B10/158 ,  H04B10/18 ,  H04B10/08

CPC分类号： H04B10/2513

摘要： An adaptive infinite impulse response (IIR) filter compensates for dispersive distortion in a fiber optic channel. The weighting coefficients of the IIR filter are updated in accordance with an error signal obtained by differentially combining the output of the IIR filter with downstream decision values or with an undistorted training signal. Undistorted training signals may be derived from training patterns (e.g., preamble) expressly transmitted for the purpose by the upstream transmitter, or from non-training, but known or predictable patterns transmitted by the upstream transmitter.

摘要翻译： 自适应无限脉冲响应（IIR）滤波器补偿光纤通道中的色散失真。 IIR滤波器的加权系数根据通过差分地组合IIR滤波器的输出与下行判定值或未失真的训练信号而获得的误差信号来更新。 可以从由上游发射机为此目的明确传输的训练模式（例如，前同步码）或由上行发射机发送的非训练但已知或可预测的模式导出非失真训练信号。

公开(公告)号：US06852966B1

公开(公告)日：2005-02-08

申请号：US10285264

申请日：2002-10-30

申请人： Darin James Douma ,  James Walter Stewart ,  Rudy Hofmeister ,  Anthony W. Ho ,  Lucy G. Hosking

发明人： Darin James Douma ,  James Walter Stewart ,  Rudy Hofmeister ,  Anthony W. Ho ,  Lucy G. Hosking

IPC分类号： H01J40/14 ,  H04B10/158

CPC分类号： H04B10/6911

摘要： The method and apparatus for compensating a photo-detector allows both regulation and monitoring of the photo-detector to be performed with a common digital controller. The controller accepts input of monitored operational parameters including received signal strength and temperature. The controller provides as an output a bias control signal which regulates a positive the positive or negative side bias voltage power supply for the photo-detector. The controller maintains the bias voltage to the photo-detector at levels which optimize the gain and signal-to-noise ratios for the photo-detector thereby facilitating the decoding of the received signal over a broad range of signal strengths and temperatures. The controller includes a corresponding digital signal strength and temperature compensators the outputs of which summed with a summer to provide the bias control signal. The digital signal strength compensator also provides as an output a monitor signal a level of which corresponds to the actual signal strength received by the photo-detector after compensation for the variable gain of the photo-detector resulting from the bias voltage level. A transceiver as well as methods and means for monitoring a photo-detector are also disclosed.

摘要翻译： 用于补偿光电检测器的方法和装置允许用公共数字控制器执行光检测器的调节和监视。 控制器接受监控的操作参数的输入，包括接收的信号强度和温度。 控制器提供偏置控制信号作为输出，该偏置控制信号调节用于光电检测器的正或负侧偏置电压电源。 控制器将光电检测器的偏置电压维持在最优化光检测器的增益和信噪比的水平，从而便于在宽范围的信号强度和温度下对接收信号进行解码。 控制器包括相应的数字信号强度和温度补偿器，其输出与加法器相加以提供偏置控制信号。 数字信号强度补偿器还提供监视信号，其电平对应于由光电检测器在补偿由偏置电压电平产生的光检测器的可变增益之后接收的实际信号强度。 还公开了收发器以及用于监测光检测器的方法和装置。

公开(公告)号：US20050025504A1

公开(公告)日：2005-02-03

申请号：US10630535

申请日：2003-07-29

申请人： Wei Huang ,  Yuriy Shkelev

发明人： Wei Huang ,  Yuriy Shkelev

IPC分类号： H04B10/158 ,  H04B10/06

CPC分类号： H04B10/6931

摘要： An optical receiver, for use for instance in an analog optical communications system such as a return path in cable television, operates over a wide range of input power to its photodetector. This is accomplished by providing in the optical receiver a series of RF amplifier stages where at least one of the stages includes a fixed attenuator and a parallel amplifier with switches suitably connected so that, at any one time, only one of the fixed attenuator or the amplifier is in the signal path. The switches are controlled so that the dynamic range of the optical receiver is improved in order to make gain reduction more accurate. Hence by redirecting the RF signal path to either the attenuator or amplifier of the amplifier stage, excessive noise and distortion by the amplifier stage are eliminated or reduced.

摘要翻译： 用于例如在诸如有线电视中的返回路径的模拟光通信系统中使用的光接收器在其光电检测器的宽范围的输入功率下工作。 这通过在光接收机中提供一系列RF放大器级来实现，其中至少一个级包括固定衰减器和具有适当地连接的开关的并联放大器，使得在任何一个时刻只有固定衰减器或 放大器处于信号路径。 控制开关以使得光接收器的动态范围得到改善，以便使增益减小更准确。 因此，通过将RF信号路径重定向到放大器级的衰减器或放大器，消除或减少放大器级的过大噪声和失真。

公开(公告)号：US6166840A

公开(公告)日：2000-12-26

申请号：US183386

申请日：1998-10-29

申请人： Jesper Barfod

发明人： Jesper Barfod

IPC分类号： G06F3/147 ,  H04B10/10 ,  H04B10/158 ,  H04B10/06

CPC分类号： G06F3/147 ,  H04B10/114 ,  H04B10/69

摘要： An electronic circuit (50) for receiving and discriminating modulated light of a specific modulation frequency or within a specific modulation frequency range includes a photodiode detector (52) responsive to light incident thereto for generating an electric current signal. A controllable shunt (54) is connected in parallel with the photodiode detector (52) and is controllable between a first operational mode in which the current is shunted, and a second operational mode in which the current is not shunted. A control circuit (56) is connected to the photodiode detector (52) and the shunt (54) for controlling the controllable shunt (54) into (a) the first operational mode, provided that the current signal does not include a signal of the specific modulation frequency or within the specific modulation frequency range, or (b) the second operational mode, provided that the current signal includes a signal of the specific modulation frequency or within the specific modulation frequency range.

摘要翻译： 用于接收和鉴别特定调制频率或特定调制频率范围内的调制光的电子电路（50）包括响应入射到其上的光产生电流信号的光电二极管检测器（52）。 可控并联（54）与光电二极管检测器（52）并联连接，并且可在电流分流的第一工作模式与电流不分流的第二工作模式之间控制。 控制电路（56）连接到光电二极管检测器（52）和用于将可控并联（54）控制成（a）第一操作模式的分流器（54），只要电流信号不包括 特定调制频率或特定调制频率范围内，或（b）第二操作模式，前提是电流信号包括特定调制频率的信号或特定调制频率范围内的信号。

公开(公告)号：US6154301A

公开(公告)日：2000-11-28

申请号：US966964

申请日：1997-11-10

申请人： Philip C. Harvey

发明人： Philip C. Harvey

IPC分类号： H04B10/158 ,  H04B10/06

CPC分类号： H04B10/6911

摘要： The fiber optic receiver disclosed herein is adapted to receive optical signals which are digitally modulated between an "ON" state in which light is being transmitted and an "OFF" or dark state. The analog output signal of a photodetector is thresholded to obtain a binary electrical output signal and is also sampled during the binary state corresponding to the "ON" received signal. A liquid crystal element is energized as a function of the sampled amplitude thereby to establish a feedback loop driving the sampled amplitude toward a preselected level providing predictable skewing of transitions in the binary output signal.

摘要翻译： 本文公开的光纤接收器适于接收在其中发射光的“ON”状态和“OFF”或暗状态之间进行数字调制的光信号。 对光检测器的模拟输出信号进行阈值处理以获得二进制电输出信号，并且在与“接通”接收信号相对应的二进制状态期间也被采样。 液晶元件作为采样幅度的函数被激励，从而建立将采样幅度驱动到预选电平的反馈回路，从而提供二进制输出信号中的转变的可预测的偏斜。

公开(公告)号：US6094285A

公开(公告)日：2000-07-25

申请号：US759901

申请日：1996-12-04

申请人： Michael G. Wickham ,  John C. Brock ,  Philip H. Wisseman ,  Lawrence J. Lembo

发明人： Michael G. Wickham ,  John C. Brock ,  Philip H. Wisseman ,  Lawrence J. Lembo

IPC分类号： G01R23/16 ,  H04B10/00 ,  H04B10/12 ,  H04B10/155 ,  H04B10/158 ,  H04B10/22 ,  H04J1/00 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/671 ,  H04B10/2575 ,  H04B2210/006

摘要： A channelizer for signals for optically channelizing RF signals modulated onto an optical carrier by optically separating the RF signals and mapping the RF signals by way of an optically dispersive element, such as a diffraction grating. In an alternate embodiment of the invention, two stages of optical filters elements are provided in series to perform sequential channelization. Bragg reflection gratings are used for coarse filtering into predetermined bands while Fabry-Perot filters tuned to specific sub-bands of the Bragg reflection gratings are used for channelization. In alternate embodiments of the invention, a silica planar waveguide and an optical splitting device, such as a Talbot splitter, are used.

摘要翻译： 用于通过光学分离RF信号并通过诸如衍射光栅的光学色散元件映射RF信号来光调制到光载波上的RF信号的信道的信道化器。 在本发明的替代实施例中，串联提供两级光学滤波器元件以执行顺序通道化。 布拉格反射光栅用于粗滤波到预定频带，而布雷格反射光栅的特定子带调谐的法布里 - 珀罗滤波器用于信道化。 在本发明的替代实施例中，使用二氧化硅平面波导和诸如Talbot分离器的分光装置。

公开(公告)号：US6055279A

公开(公告)日：2000-04-25

申请号：US156717

申请日：1998-09-18

申请人： Yusuke Ota

发明人： Yusuke Ota

IPC分类号： H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/158 ,  H04B10/26 ,  H04B10/28 ,  H04L25/03 ,  H04L25/06

CPC分类号： H04B10/695 ,  H04B10/6931

摘要： A DC coupled burst mode optical receiver circuit having improved sensitivity and improved dynamic range. The output of the receiver's photodiode is single endedly amplified by a main preamplifier and the main preamplifier's output is then converted, using an operational amplifier, e.g., with a gain of 1, to a differential signal which swings symmetrically around a threshold level. More specifically, the output of the main preamplifier is connected to one input of the operational amplifier. The output of a tracking preamplifier, which is identical to the main preamplifier, is coupled to the other input of the operational amplifier. The output of the tracking preamplifier is used to match the DC voltage of the main preamplifier, e.g., by being noise-free and by tracking changes in supply voltage, temperature, and the like. It is used to set the DC reference voltage for the standard operational amplifier functions. Between one output of the operational amplifier and the opposite sign input thereof is connected an automatic threshold controller (ATC). The ATC insures that the threshold level for determining the value of the logic value of the received signal is at the middle of the signal supplied from the main preamplifier. Preferably, the main preamplifier, the tracking preamplifier, the operational amplifier and the ATC are manufactured on a single integrated circuit. Optionally, a transimpedance resistor of both the main preamplifier and the tracking preamplifier are clamped to a predetermined maximum level, e.g., using a high-speed Schottkey diode, to enhance the dynamic range of the receiver.

摘要翻译： 具有改善的灵敏度和改善的动态范围的直流耦合突发模式光接收机电路。 接收器光电二极管的输出由主前置放大器单端放大，然后使用例如增益为1的运算放大器将主前置放大器的输出转换成围绕阈值水平对称地摆动的差分信号。 更具体地，主前置放大器的输出连接到运算放大器的一个输入端。 与主前置放大器相同的跟踪前置放大器的输出耦合到运算放大器的另一个输入端。 跟踪前置放大器的输出用于匹配主前置放大器的直流电压，例如通过无噪声和跟踪电源电压，温度等的变化。 用于设置标准运算放大器功能的直流参考电压。 在运算放大器的一个输出端和其相反符号输入端之间连接有自动阈值控制器（ATC）。 ATC确保用于确定接收信号的逻辑值的值的阈值位于从主前置放大器提供的信号的中间。 优选地，主前置放大器，跟踪前置放大器，运算放大器和ATC在单个集成电路上制造。 可选地，主前置放大器和跟踪前置放大器的跨阻抗电阻器被钳位到预定的最大电平，例如使用高速肖特基二极管，以增强接收器的动态范围。

公开(公告)号：US06043922A

公开(公告)日：2000-03-28

申请号：US868260

申请日：1997-06-03

申请人： Tadashi Koga ,  Takaaki Ogata ,  Hitoshi Oguri ,  Takashi Nakamura

发明人： Tadashi Koga ,  Takaaki Ogata ,  Hitoshi Oguri ,  Takashi Nakamura

IPC分类号： H04B10/158 ,  H04B10/06

CPC分类号： H04B10/69 ,  H04B10/675

摘要： An optical receiver board wherein, a signal light is amplified in an optical fiber amplifier. The amplified signal light is supplied to an electrically driven optical wavelength-tuning filter such as a multi-layered film interference filter, through which a signal light of a predetermined wavelength bandwidth is transmitted. The transmitted signal light is divided into first and second signal lights. The first signal light is converted to an electric signal which is amplified by an equalizing amplifier, and an amplified electric signal is supplied to a discrimination circuit, in which an information electric signal is generated by using a timing signal. The optical wavelength-tuning filter comprises a rotation actuator having a magnet-rotating portion and control coils, and an optical filter member fixed to the top of the magnet-rotating portion. In operation, the wavelength-tuning filter is swept by a sweep signal, so that an electric signal converted from a signal light transmitted through the optical wavelength-tuning filter becomes a predetermined value, and the tracking control is carried out to maximize power of the transmitted signal light. The inclination angle of the optical filter member is changed by controlling currents flowing through the control coils of the actuator, so that a transmission center wavelength of the signal light is adjusted.

摘要翻译： 一种光接收板，其中信号光在光纤放大器中被放大。 放大的信号光被提供给诸如多层膜干涉滤光器的电驱动光学波长调谐滤波器，通过该多路膜干涉滤光器传输预定波长带宽的信号光。 发射信号光分为第一和第二信号灯。 将第一信号光转换成由均衡放大器放大的电信号，并且将放大的电信号提供给通过使用定时信号产生信息电信号的鉴别电路。 光波长调谐滤波器包括具有磁旋转部分和控制线圈的旋转致动器，以及固定在磁体旋转部分顶部的滤光器部件。 在操作中，波长调谐滤波器被扫描信号扫描，使得从通过光学波长调谐滤波器传输的信号光转换的电信号变为预定值，并且执行跟踪控制以最大化功率 传输信号灯。 通过控制流过致动器的控制线圈的电流来改变滤光器构件的倾斜角度，从而调节信号光的透射中心波长。