公开(公告)号：US07394990B1

公开(公告)日：2008-07-01

申请号：US11137471

申请日：2005-05-26

申请人： Ting K. Yee

发明人： Ting K. Yee

IPC分类号： H04B10/16 ,  G02F1/35 ,  G02F2/02

CPC分类号： H04B10/29 ,  G02F2/004 ,  G02F2002/006

摘要： An optical wavelength converter receives an input optical signal, and in response, generates an output optical signal having a wavelength that is different from the wavelength of the received input signal. An optical amplifier amplifies the received input signal and delivers the amplified signal to an optical splitter adapted to split the amplified signal into two identical optical signals. An optical multiplexer receives one of the split signals as well as a continuous wave optical signal to generate a combined signal. An semiconductor optical amplifier receives the combined signal at its first side, and the other one of the split signals at its second side. The output signal is generated as a result of a counter-propagating four-wave mixing occurring within the semiconductor optical amplifier. This output signal has the same wavelength as the continuous-wave signal and has an amplitude modulation that is identical to the amplitude modulation of the input signal.

摘要翻译： 光波长转换器接收输入光信号，作为响应，产生具有不同于所接收的输入信号的波长的波长的输出光信号。 光放大器放大所接收的输入信号，并将放大的信号传送到适于将放大的信号分成两个相同的光信号的分光器。 光复用器接收分离信号之一以及连续波光信号以产生组合信号。 半导体光放大器在其第一侧接收组合信号，在其第二侧接收另一分离信号。 作为在半导体光放大器内发生的相反传播的四波混频的结果产生输出信号。 该输出信号具有与连续波信号相同的波长，并且具有与输入信号的幅度调制相同的幅度调制。

公开(公告)号：US07209660B1

公开(公告)日：2007-04-24

申请号：US09728373

申请日：2000-11-28

申请人： Ting K Yee ,  Peter H Chang

发明人： Ting K Yee ,  Peter H Chang

IPC分类号： H04B10/145 ,  H04B10/148 ,  H04B10/207 ,  H04B10/04 ,  H04B10/06 ,  H04J14/02 ,  H04J1/04 ,  H04J1/06 ,  H04J1/08

CPC分类号： H04J14/005 ,  H04B10/50 ,  H04B10/61 ,  H04B10/6151 ,  H04B10/64 ,  H04J14/02 ,  H04J14/0298

摘要： An optical communications system includes a receiver subsystem with at least two heterodyne receivers. The receiver subsystem receives a composite optical signal having two or more subbands of information and corresponding tones. An optical splitter splits the composite optical signal into optical signals. Each optical signal includes a subband(s) and corresponding tone. Each heterodyne receiver receives an optical signal. The receiver includes a heterodyne detector coupled to a signal extractor. The heterodyne detector mixes the optical signal with an optical local oscillator to produce an electrical signal which includes a frequency down-shifted version of the subband and the tone of the optical signal. The signal extractor mixes the frequency down-shifted subband with the frequency down-shifted tone to produce a frequency component containing the information.

摘要翻译： 光通信系统包括具有至少两个外差接收器的接收器子系统。 接收器子系统接收具有两个或多个信息子带和对应音调的复合光信号。 光分路器将复合光信号分解为光信号。 每个光信号包括一个子带和相应的音调。 每个外差接收器接收光信号。 接收机包括耦合到信号提取器的外差检测器。 外差检测器将光学信号与光学本地振荡器混合以产生包括子带的频率下变换版本和光信号的色调的电信号。 信号提取器将频移下变频子频带与下变频音调混合以产生包含信息的频率分量。

公开(公告)号：US06204951B1

公开(公告)日：2001-03-20

申请号：US09082620

申请日：1998-05-19

申请人： James F. Coward ,  Ting K. Yee ,  Peter Chang ,  Abraham Kou

发明人： James F. Coward ,  Ting K. Yee ,  Peter Chang ,  Abraham Kou

IPC分类号： G02F103

CPC分类号： G02F1/225 ,  G02F1/2255 ,  G02F2203/19

摘要： An electro-optic modulator includes a splitting section, at least three transmission legs, an RF phase-shifting section, a DC-phase shifting section, and a combining section. The splitting section splits a received optical signal into sub-signals, one for each transmission leg. The RF phase-shifting section phase shifts at least two of the sub-signals by an amount proportional to a received RF signal; while the DC phase-shifting section phase shifts at least two of the sub-signals by a DC phase. The combining section combines the phase-shifted sub-signals into a modulated optical signal. In a preferred embodiment, the modulator is characterized by design parameters, such as splitting ratio, DC phase shift, RF coupling efficiency, and combining ratio, and these design parameters are selected to ensure that the modulator meets predetermined performance characteristics, such as maximum harmonic levels or minimum signal to noise ratios.

摘要翻译： 电光调制器包括分离部分，至少三个传输腿，RF相移部分，DC相移部分和组合部分。 分离部分将接收到的光信号分成子信号，每个传输分支一个。 RF相移部分将至少两个子信号相移一个与所接收的RF信号成比例的量; 而直流相移部分通过DC相位将至少两个子信号相移。 组合部分将相移的子信号组合成调制的光信号。 在优选实施例中，调制器的特征在于设计参数，例如分频比，DC相移，RF耦合效率和组合比，并且选择这些设计参数以确保调制器满足预定的性能特性，例如最大谐波 电平或最小信噪比。

公开(公告)号：US5323406A

公开(公告)日：1994-06-21

申请号：US970752

申请日：1992-11-02

申请人： Ting K. Yee ,  James F. Coward ,  Peter H. Chang

发明人： Ting K. Yee ,  James F. Coward ,  Peter H. Chang

IPC分类号： G02F1/225 ,  G02F2/00 ,  H01S5/0687 ,  H01S3/13

CPC分类号： G02F1/225 ,  G02F2/002 ,  G02F2203/19 ,  H01S5/0687

摘要： A Mach-Zehnder modulator (MZM), which divides a CW laser beam into two optical portions, is biased at a 180.degree. phase difference between the two optical portions. An RF signal and an LO signal are simultaneously applied to one of the optical portions of the laser beam to produce phase changes between the two optical portions. The two optical portions of the laser beam are then recombined into an optical output beam, which is detected by a photodetector. The photodetector generates a photocurrent, which contains a component at a beat frequency--i.e., the frequency difference between the RF and LO frequencies. The waveform of the photocurrent component at the beat frequency is substantially the same (except for amplitude and a fixed phase shift) as the waveform of the RF signal.

摘要翻译： 将CW激光束分成两个光学部分的马赫 - 曾德调制器（MZM）被偏置在两个光学部分之间的180°相位差处。 RF信号和LO信号同时施加到激光束的光学部分之一，以产生两个光学部分之间的相位变化。 然后将激光束的两个光学部分重新组合成由光电检测器检测的光输出光束。 光电检测器产生光电流，其包含以频率为单位的分量，即RF和LO频率之间的频率差。 拍频时的光电流成分的波形与RF信号的波形基本相同（振幅除以固定的相移）。

公开(公告)号：US07146103B2

公开(公告)日：2006-12-05

申请号：US09918886

申请日：2001-07-30

申请人： Ting K Yee ,  Peter H Chang ,  Shin-Sheng Tarng ,  Gregory M Cutler ,  Slava Yazhgur ,  Ji Li ,  Laurence J Newell ,  James F Coward ,  Michael W Rowan ,  Norman L Swenson ,  Matthew C Bashaw

发明人： Ting K Yee ,  Peter H Chang ,  Shin-Sheng Tarng ,  Gregory M Cutler ,  Slava Yazhgur ,  Ji Li ,  Laurence J Newell ,  James F Coward ,  Michael W Rowan ,  Norman L Swenson ,  Matthew C Bashaw

IPC分类号： H04J14/02 ,  H04J1/00 ,  H04J1/04 ,  H04J1/08 ,  H04B10/04 ,  H04B10/05 ,  H04B10/08 ,  H04B10/145 ,  H04B10/148

CPC分类号： H04B10/2507 ,  H04B10/532 ,  H04B10/61 ,  H04B10/614 ,  H04B10/6151 ,  H04B10/64

摘要： A transmitter subsystem generates an optical signal which contains multiple subbands of information. The subbands have different polarization. For example, in one approach, two or more optical transmitters generate optical signals which have different polarization. An optical combiner optically combines the optical signals into a composite optical signal for transmission across an optical fiber. In another aspect, each optical transmitter generates an optical signal containing both a lower optical sideband and an upper optical sideband (i.e., a double sideband optical signal). An optical filter selects the upper optical sideband of one optical signal and the lower optical sideband of another optical signal to produce a composite optical signal.

摘要翻译： 发射机子系统产生包含多个信息子带的光信号。 子带具有不同的极化。 例如，在一种方法中，两个或更多个光发射器产生具有不同极化的光信号。 光学组合器将光学信号光学地组合成用于跨光纤传输的复合光信号。 在另一方面，每个光发射机产生包含下光边带和上光边带（即，双边带光信号）的光信号。 光滤波器选择一个光信号的上光边带和另一光信号的下光边带产生复合光信号。

公开(公告)号：US6046838A

公开(公告)日：2000-04-04

申请号：US218731

申请日：1998-12-22

申请人： Abraham H. Kou ,  Ting K. Yee ,  Norman L. Swenson

发明人： Abraham H. Kou ,  Ting K. Yee ,  Norman L. Swenson

IPC分类号： G02F1/05 ,  G02F1/21 ,  H04B10/155 ,  G02F1/03 ,  H04B10/04

CPC分类号： G02F1/0516 ,  H04B10/505 ,  H04B10/50575 ,  H04B10/564 ,  G02F2001/212 ,  G02F2202/20 ,  G02F2203/21

摘要： The bias point of an electro-optic modulator, such as an Mach-Zender modulator, is automatically controlled. A pilot signal, preferably two pilot tones at different frequencies, is applied to the modulator. The output of the modulator then contains various components resulting from the pilot signal. An error signal is generated, preferably coherently, based on one of these components, termed the pilot component, which preferably is located at the difference frequency of the two pilot tones. A bias signal which controls the bias point of the modulator is adjusted based on the error signal. The coherent generation of the error signal facilitates feedback loops based on phase and/or amplitude control and also supports locking the electro-optic modulator to a bias point with a preselected slope (either negatively or positively sloping).

摘要翻译： 诸如Mach-Zender调制器的电光调制器的偏置点被自动控制。 导频信号，优选地在不同频率的两个导频音调被施加到调制器。 然后，调制器的输出包含由导频信号产生的各种分量。 基于称为导频部件的这些部件中的一个，优选地相干地产生误差信号，优选地位于两个导频音调的差频。 基于误差信号调整控制调制器偏置点的偏置信号。 误差信号的相干产生有助于基于相位和/或幅度控制的反馈回路，并且还支持将电光调制器锁定到具有预选斜率（负或正倾斜）的偏置点。

公开(公告)号：US08174705B1

公开(公告)日：2012-05-08

申请号：US12707650

申请日：2010-02-17

申请人： James F. Coward ,  Ting K. Yee ,  William C. Dickson

发明人： James F. Coward ,  Ting K. Yee ,  William C. Dickson

IPC分类号： G01B11/02 ,  G01N21/00

CPC分类号： G01B11/26 ,  G01B9/02004 ,  G01B9/02057 ,  G01B9/02068 ,  G01B9/0207 ,  G01B2290/15 ,  G01D5/266 ,  G01J3/26 ,  G02B26/101

摘要： A mirror drive mechanism for a tilting mirror is controlled using feedback from one or more interferometric angular sensors. The wavelength of an optical beam is varied as it is fed into an interferometric angular sensor. The wavelength at which the resulting interference pattern is measured to be at a minimum intensity is determined. This wavelength is used to determine a distance quantity representative of the angular position of the mirror.

摘要翻译： 使用来自一个或多个干涉式角度传感器的反馈来控制用于倾斜镜的反射镜驱动机构。 光束的波长随着被馈送到干涉式角度传感器而变化。 确定所得到的干涉图案处于最小强度的波长。 该波长用于确定表示反射镜的角位置的距离量。

公开(公告)号：US07346279B1

公开(公告)日：2008-03-18

申请号：US10107085

申请日：2002-03-25

申请人： Ji Li ,  Laurence J. Newell ,  Tin Vo ,  Ting K. Yee ,  Peter H. Chang ,  Robert K. McElheny

发明人： Ji Li ,  Laurence J. Newell ,  Tin Vo ,  Ting K. Yee ,  Peter H. Chang ,  Robert K. McElheny

IPC分类号： H04B10/08 ,  H04B10/00

CPC分类号： H04B10/64 ,  H04B10/40 ,  H04B10/6165

摘要： A heterodyne communication system uses coherent data modulation that is resistant to phase noise. In particular, a pilot tone and reference clock signal are transmitted along with the modulated data to form the basis of an electrical demodulation local oscillator at the receiver. The pilot tone and/or reference clock signal carry phase noise which is correlated with the phase noise in the data signal. At the receiver, the local oscillator is generated from the pilot tone and reference clock signal in a manner so that the local oscillator also has phase noise which is correlated with the phase noise in the data signal. Thus, the two noise components can be used to cancel each other during demodulation of the data signal using the local oscillator.

摘要翻译： 外差通信系统使用耐相位噪声的相干数据调制。 特别地，导频和参考时钟信号与调制数据一起发送，以形成接收机处的电解调本地振荡器的基础。 导频音和/或参考时钟信号携带与数据信号中的相位噪声相关的相位噪声。 在接收器处，本地振荡器以导频和参考时钟信号的方式产生，使得本地振荡器也具有与数据信号中的相位噪声相关的相位噪声。 因此，使用本地振荡器在解调数据信号期间可以使用两个噪声分量来相互抵消。

公开(公告)号：US06529303B1

公开(公告)日：2003-03-04

申请号：US09405367

申请日：1999-09-24

申请人： Michael W. Rowan ,  David B. Upham ,  Augustus Elmer ,  Laurence J. Newell ,  David A. Pechner ,  Abraham Kou ,  James F. Coward ,  Norman L. Swenson ,  Minnie Ho ,  Peter H. Chang ,  Ting K. Yee ,  Stuart E. Wilson

发明人： Michael W. Rowan ,  David B. Upham ,  Augustus Elmer ,  Laurence J. Newell ,  David A. Pechner ,  Abraham Kou ,  James F. Coward ,  Norman L. Swenson ,  Minnie Ho ,  Peter H. Chang ,  Ting K. Yee ,  Stuart E. Wilson

IPC分类号： H04J1402

CPC分类号： B82Y15/00 ,  H04B10/2513 ,  H04J1/08 ,  H04J1/14 ,  H04J14/0298 ,  H04L5/06 ,  H04L27/34

摘要： A frequency division multiplexing (FDM) node used in optical communications networks provides add-drop multiplexing (ADM) functionality between optical high-speed channels and electrical low-speed channels. The FDM node includes a high-speed system and an ADM crosspoint. The high-speed system converts between an optical high-speed channel and its constituent electrical low-speed channels through the use of frequency division multiplexing and preferably also QAM modulation. The ADM crosspoint couples incoming low-speed channels to outgoing low-speed channels, thus implementing the ADM functionality for the FDM node.

摘要翻译： 在光通信网络中使用的频分复用（FDM）节点在光高速信道和电低速信道之间提供了添加多路复用（ADM）功能。 FDM节点包括高速系统和ADM交叉点。 高速系统通过使用频分多路复用并优选地也进行QAM调制，在光学高速信道与其组成的低速信道之间进行转换。 ADM交叉点将输入低速通道耦合到输出低速通道，从而实现FDM节点的ADM功能。

公开(公告)号：US06493131B1

公开(公告)日：2002-12-10

申请号：US09746370

申请日：2000-12-20

申请人： Shin-Sheng Tarng ,  Slava Yazhgur ,  Ting K. Yee ,  Peter H. Chang

发明人： Shin-Sheng Tarng ,  Slava Yazhgur ,  Ting K. Yee ,  Peter H. Chang

IPC分类号： G02F202

CPC分类号： H04B10/572 ,  H01S5/0687 ,  H04B10/503

摘要： A device is used to wavelength lock two optical signals to some frequency offset. A photomixer section produces a frequency test signal from the beat component of the two optical signals. The frequency of the frequency test signal reflects whether the actual frequency offset of the two optical signals equals the desired offset. A frequency filter with a monotonically varying transfer function is used to filter the frequency test signal. Thus, different gains are applied to different frequencies. Comparison circuitry uses the filtered signal to determine whether the frequency filter applied the gain which corresponds to the desired frequency offset and generates a corresponding error signal.

摘要翻译： 一个设备用于将两个光信号锁定到一些频偏。 光混合器部分产生来自两个光信号的拍子分量的频率测试信号。 频率测试信号的频率反映两个光信号的实际频率偏移是否等于期望的偏移。 使用具有单调变化传递函数的频率滤波器对频率测试信号进行滤波。 因此，不同的增益被应用于不同的频率。 比较电路使用经滤波的信号来确定频率滤波器是否施加与期望频率偏移相对应的增益，并产生相应的误差信号。