公开(公告)号：US07725043B2

公开(公告)日：2010-05-25

申请号：US10960159

申请日：2004-10-07

申请人： Willie W. Ng ,  David L. Persechini ,  Robert H. Buckley

发明人： Willie W. Ng ,  David L. Persechini ,  Robert H. Buckley

IPC分类号： H04B10/04 ,  H01S3/00

CPC分类号： H04B10/504 ,  H01S5/06817

摘要： A laser transmitter with a feedback control loop for minimizing noise. The novel laser transmitter includes a laser, an external reflector adapted to form an extended cavity to the laser, and a feedback control loop adapted to detect noise in the laser and in accordance therewith, adjust the optical phase of the extended cavity such that the noise is at a desired level. The optical phase of the extended cavity is adjusted by adjusting an operating parameter of the laser, such as its bias current. In an illustrative embodiment, the feedback control loop is adapted to compute the rate of change of the noise with respect to bias current and in accordance therewith, adjust the bias current of the laser such that relative intensity noise and interferometric intermodulation distortion are simultaneously minimized.

摘要翻译： 具有反馈控制回路的激光发射器，用于最小化噪声。 新颖的激光发射器包括激光器，适于形成到激光器的延伸空腔的外部反射器，以及适于检测激光器中的噪声的反馈控制回路，并且根据该激光器调节扩展腔体的光学相位，使得噪声 处于所需的水平。 通过调整激光器的工作参数（如偏置电流）来调节扩展腔的光学相位。 在说明性实施例中，反馈控制环路适于计算噪声相对于偏置电流的变化率，并且根据其调整激光器的偏置电流，使得相对强度噪声和干涉式互调失真同时最小化。

公开(公告)号：US08879916B1

公开(公告)日：2014-11-04

申请号：US13310770

申请日：2011-12-04

申请人： Willie W. Ng ,  David L. Persechini

发明人： Willie W. Ng ,  David L. Persechini

IPC分类号： H04B10/00 ,  H04J14/00

CPC分类号： H04B10/25759

摘要： This invention provides an approach to lock the optical phase of a single sideband, carrier-suppressed coherent-AM analog optical link, so that for example an RF signal can be transmitted with high fidelity over fibers. In some embodiments, a method comprises providing a RF locking signal; impressing an RF input signal and the RF locking signal onto the optical field of a suppressed carrier; introducing the optical spectrum to a photonic integrated circuit comprising a microresonator filter and a finite impulse response filter; selectively passing the double sideband, associated with the locking frequency, through the finite impulse response filter; and recovering a RF output signal, wherein a feedback loop provides dithering to stabilize the optical phase of the link and thus preserve amplitude/phase integrity for the RF-photonic signal. The disclosed method is especially suited to the filtering of RF-photonic signals via use of the resonance passbands derived from microdisks or micro-rings.

摘要翻译： 本发明提供了锁定单个边带，载波抑制的相干AM模拟光链路的光相位的方法，使得例如可以在光纤上以高保真度传输RF信号。 在一些实施例中，一种方法包括提供RF锁定信号; 将RF输入信号和RF锁定信号施加到抑制载波的光场上; 将光谱引入包括微谐振器滤波器和有限脉冲响应滤波器的光子集成电路; 通过有限脉冲响应滤波器选择性地通过与锁定频率相关联的双边带; 并且恢复RF输出信号，其中反馈环路提供抖动以稳定链路的光学相位，并因此保持RF-光子信号的振幅/相位完整性。 所公开的方法特别适用于通过使用从微盘或微环获得的共振通带来对RF-光信号进行滤波。

公开(公告)号：US07088886B2

公开(公告)日：2006-08-08

申请号：US10714494

申请日：2003-11-13

申请人： Metin S. Mangir ,  Daniel Yap ,  Willie W. Ng

发明人： Metin S. Mangir ,  Daniel Yap ,  Willie W. Ng

IPC分类号： G02B6/26 ,  G02B6/42

CPC分类号： H04B10/2537 ,  G01S7/292

摘要： A limiter for limiting selected frequency components by generating Stokes waves in a stimulated Brillouin scattering medium. The generated Stokes waves create a seed that is provided to another stimulated Brillouin scattering medium. The seed selecting the undesired frequency components to be attenuated.

摘要翻译： 限制器，用于通过在受激布里渊散射介质中产生斯托克斯波来限制所选频率分量。 所产生的斯托克斯波产生提供给另一个受激布里渊散射介质的种子。 种子选择要衰减的不需要的频率分量。

公开(公告)号：US06628849B2

公开(公告)日：2003-09-30

申请号：US09848498

申请日：2001-05-03

申请人： Daniel Yap ,  Willie W. Ng

发明人： Daniel Yap ,  Willie W. Ng

IPC分类号： G02F1035

CPC分类号： G02F1/3136

摘要： An apparatus and method for photonically sampling an analog signal and encoding the photonically sampled signal. The two interferometer arms of a Mach-Zehnder interferometer section are directly coupled to the dual input ports of a directional coupler switch section. Optical pulses transmitted through the interferometer arms are phase shifted in proportion to an analog signal applied at the electrical input port of the Mach-Zehnder interferometer section. The phase-shifted pulses in each interferometer arm are coupled in the directional coupler switch section and are directed to the dual output ports of the directional switch section based upon the binary code applied to the electrical input port of the directional coupler switch section. The directional switch section has an optical length designed to provide a net phase shift of 3&pgr;/4.

公开(公告)号：US08334797B1

公开(公告)日：2012-12-18

申请号：US12763965

申请日：2010-04-20

申请人： Willie W. Ng ,  George C. Valley ,  George Anthony Sefler

发明人： Willie W. Ng ,  George C. Valley ,  George Anthony Sefler

IPC分类号： H03M1/00

CPC分类号： H03M1/1245 ,  G02F7/00 ,  H03M1/121

摘要： A method of performing analog to digital conversation of an analog signal Vin(t), the method including the steps of: utilizing both of the complementary arms of an electro-optic modulator to recover the analog input signal Vin(t), while using only one time-stretch element and one λ-demultiplexer after the electro-optic modulator. The single time-stretch element and one λ-demultiplexer serve to stretch and demultiplex the signals from both of the complementary output arms of the electro-optic modulator thereby improving and simplifying post-processing algorithms used to correct for static distortions and nonlinearities that originate from imperfect photonic hardware. Double-balanced photoreceivers are preferably coupled to outputs of the single λ-demultiplexer. The single time-stretch element is preferably implemented by a chirped fiber grating. Apparatus for carrying out the method is described.

摘要翻译： 一种执行模拟信号Vin（t）的模拟 - 数字会话的方法，所述方法包括以下步骤：利用电光调制器的两个互补臂来恢复模拟输入信号Vin（t），同时仅使用 电光调制器后的一个时间拉伸元件和一个λ解复用器。 单个时间拉伸元件和一个λ解复用器用于对来自电光调制器的互补输出臂的信号进行拉伸和解复用，从而改进和简化用于校正静态失真和非线性的后处理算法 不完美的光子硬件。 双平衡光接收器优选地耦合到单个λ解复用器的输出。 单个时间拉伸元件优选地由啁啾光纤光栅实现。 描述用于执行该方法的装置。

公开(公告)号：US08331743B2

公开(公告)日：2012-12-11

申请号：US12183064

申请日：2008-07-31

申请人： Willie W. Ng ,  Brian N. Limketkai ,  Robert R. Hayes ,  Daniel Yap ,  Peter Petre

发明人： Willie W. Ng ,  Brian N. Limketkai ,  Robert R. Hayes ,  Daniel Yap ,  Peter Petre

IPC分类号： G02B6/12

CPC分类号： G02B6/12007 ,  G02B6/29343 ,  G02B6/29383 ,  G02B6/29395 ,  G02F1/3132 ,  G02F2001/212 ,  G02F2203/15 ,  G02F2203/50

摘要： The present invention describes a microresonator that can be used as a 1:f variable coupler in a unit cell. It is described how a cascade of unit cells can be used to form a tunable, higher-order RF-filter with reconfigurable passbands. The disclosed filter structure can be utilized for the narrowband channelization of RF signals that have been modulated onto optical carriers. It is also disclosed how to utilize add/drop capabilities of the contemplated microdisks to confer connectivity and cascading in two dimensions. The present invention can conveniently provide a wavelength division multiplexing router, where an array of unit cells as provided herein can form a programmable optical switching matrix, through electronic programming of filter parameters.

摘要翻译： 本发明描述了可以在单位电池中用作1：f可变耦合器的微谐振器。 描述了如何使用级联的单元电池来形成具有可重新配置的通带的可调谐，高阶RF滤波器。 所公开的滤波器结构可用于已经调制到光载波上的RF信号的窄带信道化。 还公开了如何利用预期的微盘的添加/删除能力来赋予连接和级联的二维。 本发明可以方便地提供波分复用路由器，其中本文提供的单元阵列阵列可以通过滤波器参数的电子编程形成可编程光开关矩阵。

公开(公告)号：US07835600B1

公开(公告)日：2010-11-16

申请号：US12176071

申请日：2008-07-18

申请人： Daniel Yap ,  James H. Schaffner ,  Daniel F. Sievenpiper ,  Kevin Geary ,  Willie W. Ng ,  Daniel J. Gregoire ,  Joseph S. Colburn

发明人： Daniel Yap ,  James H. Schaffner ,  Daniel F. Sievenpiper ,  Kevin Geary ,  Willie W. Ng ,  Daniel J. Gregoire ,  Joseph S. Colburn

IPC分类号： G02B6/00 ,  G02F1/01 ,  G02B6/34

CPC分类号： G01R29/0885 ,  G02F1/2255 ,  G02F2001/212 ,  G02F2001/213 ,  G02F2201/307 ,  H01Q3/2676 ,  H01Q13/02

摘要： A method of and apparatus for modulating an optical carrier by an incident electromagnetic field. The electromagnetic field propagates in a dielectric-filled transverse electromagnetic waveguide, At least one slice of an electro-optic material is disposed in the dielectric-filled transverse electromagnetic waveguide, the electro-optic material in the dielectric-filled transverse electromagnetic waveguide having at least one optical waveguide therein which has at least a major portion thereof guiding light in a direction orthogonal with respect to a direction in which the dielectric-filled transverse electromagnetic waveguide guides the incident electromagnetic field. Light is caused to propagate in the at least one optical waveguide in the at least one slice of an electro-optic material in the dielectric-filled transverse electromagnetic waveguide for modulation by the incident electromagnetic field.

摘要翻译： 一种通过入射电磁场调制光载波的方法和装置。 电磁场在介质填充的横向电磁波导中传播，至少一片电光材料设置在电介质填充的横向电磁波导中，电介质填充的横向电磁波导中的电光材料至少具有 其中一个光波导具有至少其主要部分，它在相对于介质填充的横向电磁波导引导入射电磁场的方向正交的方向上引导光。 导致光在电介质填充的横向电磁波导中的电光材料的至少一个切片中的至少一个光波导中传播，以通过入射电磁场进行调制。

公开(公告)号：US06175672B1

公开(公告)日：2001-01-16

申请号：US09336264

申请日：1999-06-18

申请人： Irwin L. Newberg ,  Robert R. Hayes ,  Kapriel V. Krikorian ,  Robert Y. Loo ,  Willie W. Ng ,  Robert A. Rosen

发明人： Irwin L. Newberg ,  Robert R. Hayes ,  Kapriel V. Krikorian ,  Robert Y. Loo ,  Willie W. Ng ,  Robert A. Rosen

IPC分类号： G02B628

CPC分类号： H04B10/2575

摘要： A substantially lossless transmissive link, such as an RF fiber optic link, that selectively employs a number of techniques to improve various link parameters. The link may be structured to comprise a high power light source, such as a laser, that provides light output having a high level of optical power. A feedback circuit may be disposed around the light source that reduces relative-intensity-noise levels produced by the light source at low frequencies. A modulator is provided that modulates the light output of the light source. Preferably, a dual output modulator may be used to provide two modulated optical signals whose respective RF modulation is “effectively” 180 degrees out of phase. An optical fiber that transmits the modulated optical signal(s). A photodetector without a load resistor directly on its output that is operable at the high level of optical power, receives the modulated light and recovers the RF signal. A dual balaniced photodetector that is used in conjunction with the dual output modulator. An RF component, such as an amiplifier, that is coupled directly to an output of the photodetector that provides a load resistance for the link.

摘要翻译： 基本上无损的透射链路，例如RF光纤链路，其选择性地采用多种技术来改善各种链路参数。 链路可以被构造为包括提供具有高水平光功率的光输出的诸如激光器的高功率光源。 可以在光源周围设置反馈电路，从而降低光源在低频时产生的相对强度噪声水平。 提供调制器来调节光源的光输出。 优选地，双输出调制器可以用于提供两个调制的光信号，其相应的RF调制“有效地”相位相差180度。 发送调制光信号的光纤。 没有负载电阻器的光电检测器直接在其输出端处可以在高功率电平下工作，接收调制的光并恢复RF信号。 双重平衡光电检测器，与双输出调制器结合使用。 RF分量，例如放大器，其直接耦合到光电检测器的输出端，为链路提供负载电阻。

公开(公告)号：US5404006A

公开(公告)日：1995-04-04

申请号：US183206

申请日：1994-01-18

申请人： James H. Schaffner ,  Joseph L. Pikulski ,  Robert Y. Loo ,  Willie W. Ng

发明人： James H. Schaffner ,  Joseph L. Pikulski ,  Robert Y. Loo ,  Willie W. Ng

IPC分类号： H01L31/0232 ,  G02B6/42 ,  H01L27/144 ,  H01L31/10 ,  H01L31/108 ,  H01P3/08 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/158 ,  H04B10/26 ,  H04B10/28 ,  H01J40/14

CPC分类号： H04B10/69 ,  G02B6/42 ,  H01L27/144 ,  H01L27/1446 ,  H01L31/1085 ,  H04B10/6932

摘要： An optical receiver with an enhanced power capability and wide bandwidth is implemented by distributing a number of photodetectors along an optical transmission channel to convert respective portions of an optical signal into electrical signals. An electrical transmission line receives and accumulates signal inputs from the photodetectors. A velocity matching is established between the optical and electrical signals, allowing the photodetector outputs to accumulate coherently along the electrical transmission line, by loading the transmission line with distributed capacitance elements. The loading capacitances are preferably inherent in the photodetectors, which are designed and spaced apart from each other to yield the desired velocity matching. Possible photodetectors include p-i-n photodiodes with associated depletion layer capacitances, and metal-semiconductor-metal devices in which the capacitance is provided by interdigitated fingers that extend over an active optically absorbing layer on the waveguide from electrodes on either side.

摘要翻译： 具有增强的功率能力和宽带宽的光接收机通过沿光传输信道分布多个光电检测器来实现，以将光信号的各个部分转换为电信号。 电传输线接收并累积来自光电检测器的信号输入。 在光信号和电信号之间建立速度匹配，允许光电检测器输出通过将传输线与分布式电容元件相加来沿着电传输线累积。 负载电容优选在光电检测器中是固有的，其被设计并彼此分开以产生期望的速度匹配。 可能的光电检测器包括具有相关的耗尽层电容的p-i-n光电二极管以及金属 - 半导体 - 金属器件，其中电容由交叉指状物提供，其在波导上的任一侧上的电极上延伸超过有源光学吸收层。

公开(公告)号：US08023831B1

公开(公告)日：2011-09-20

申请号：US12966900

申请日：2010-12-13

申请人： Robert R. Hayes ,  Willie W. Ng

发明人： Robert R. Hayes ,  Willie W. Ng

IPC分类号： H04B10/04

CPC分类号： H04B10/50 ,  H04B2210/006

摘要： In one of many possible implementations and embodiments, a method is provided for providing linearized phase modulation and demodulation in an RF-photonic link. This includes phase modulating a photonic carrier signal in a signal arm using the RF input and using the RF output in a negative feedback phase tracking loop to modulate either the RF input modulated carrier signal in the signal arm, or a signal in a local oscillator arm. Optical signals from the signal arm and the local oscillator arm are optically coupled. The optically coupled signals are photodetected and differentally combined. The differentially combined signals are amplified to provide the RF output signal. In some implementations, the photonic carrier signal is suppressed prior to photodetection. Further, in some implementations a small portion of the local oscillator signal may be coupled with the carrier suppressed optical signal.