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91. 发明授权

US5185752A Coupling arrangements for frequency-doubled diode lasers 失效
标题翻译：倍频二极管激光器的耦合布置
公开(公告)号：US5185752A
公开(公告)日：1993-02-09
申请号：US837819
申请日：1992-02-18
申请人： David F. Welch , Robert G. Waarts
发明人： David F. Welch , Robert G. Waarts
IPC分类号： G02F1/35 , H01S3/109 , H01S5/06 , H01S5/065 , H01S5/14
CPC分类号： H01S5/141 , G02F1/3775 , G02F2001/3548 , G02F2202/20 , H01S5/0092 , H01S5/02252 , H01S5/0654 , H01S5/4062 , H01S5/4087
摘要： Arrangements for efficiently coupling light between a laser diode and a second-harmonic generator which feature external resonant cavities that include a feedback grating fabricated on the second-harmonic generator. The feedback grating reflects light of a first frequency that matches the frequency doubling band of the second-harmonic generator, thereby establishing stable laser oscillation at that first frequency. Preferably, the second-harmonic generator has a periodically-poled waveguide formed in the surface of the nonlinear material body. The laser diode may be butted against the harmonic generator or coupling optics may be positioned between the two. In one arrangement, a polarizer is placed in the resonant cavity, either between an external back reflector and the back facet of the laser diode or between the antireflection coated front facet of the laser diode and the harmonic generator, to provide loss to the TE polarization mode and enhance oscillation in the TM polarization mode. In another arrangement, a half-wave plate is positioned between the antireflection coated front facet of the laser diode and the input end of the harmonic generator to cause TE mode oscillation in the laser diode, while coupling TM polarized light into the harmonic generator. The laser diode may be a monolithic laser diode array with multiple emitters, with the second-harmonic generator having multiple waveguides for receiving and doubling the frequency of light received from a corresponding diode emitter. The diode array may be a multiple wavelength array.
摘要翻译：用于在激光二极管和二次谐波发生器之间有效耦合光的布置，其特征在于包括在二次谐波发生器上制造的反馈光栅的外部谐振腔。反馈光栅反射与二次谐波发生器的倍频带匹配的第一频率的光，从而在该第一频率处建立稳定的激光振荡。优选地，二次谐波发生器具有形成在非线性材料体的表面中的周期性极化的波导。激光二极管可以对着谐波发生器，或者耦合光学器件可以位于两者之间。在一种布置中，偏振器被放置在谐振腔中，无论是在外部后反射器和激光二极管的背面之间，还是在激光二极管的抗反射涂覆的前面与谐波发生器之间，以提供TE偏振损耗模式，并增强TM偏振模式下的振荡。在另一种布置中，半波片位于激光二极管的抗反射涂层前面和谐波发生器的输入端之间，以在激光二极管中引起TE模式振荡，同时将TM偏振光耦合到谐波发生器中。激光二极管可以是具有多个发射器的单片激光二极管阵列，其中二次谐波发生器具有多个波导，用于接收并加倍从相应的二极管发射器接收的光的频率。二极管阵列可以是多波长阵列。

92. 发明授权

US10012797B1 Monolithic photonic integrated circuit (PIC) with a plurality of integrated arrays of laser sources and modulators employing an extended identical active layer (EIAL) 有权
公开(公告)号：US10012797B1
公开(公告)日：2018-07-03
申请号：US11045462
申请日：2005-01-27
申请人： Radhakrishnan L. Nagarajan , Fred A. Kish, Jr. , Masaki Kato , Charles H. Joyner , David F. Welch , Randal A. Salvatore , Richard P. Schneider , Mehrdad Ziari , Damien Jean Henri Lambert , Sheila K. Hurtt , Andrew G. Dentai , Atul Mathur , Vincent G. Dominic
发明人： Radhakrishnan L. Nagarajan , Fred A. Kish, Jr. , Masaki Kato , Charles H. Joyner , David F. Welch , Randal A. Salvatore , Richard P. Schneider , Mehrdad Ziari , Damien Jean Henri Lambert , Sheila K. Hurtt , Andrew G. Dentai , Atul Mathur , Vincent G. Dominic
IPC分类号： G02B6/12 , G02B6/293
CPC分类号： G02B6/12004 , G02B6/12009 , G02B6/136 , H01S5/02248 , H01S5/026 , H01S5/0265 , H01S5/0268 , H01S5/0683 , H01S5/1221 , H01S5/1231 , H01S5/34306 , H01S5/4012 , H01S5/4087
摘要： A semiconductor monolithic transmitter photonic integrated circuit (TxPIC) comprises two different situations, either at least one signal channel in the PIC having a modulated source with the channel also extended to include at least one additional element or a plurality of modulated sources comprising N signal channels in the PIC of different transmission wavelengths, where N is equal to or greater than two (2), which may also approximate emission wavelengths along a standardized wavelength grid. In these two different situations, a common active region for such modulated sources and additional channel elements is identified as an extended identical active layer (EIAL), as it extends from a single modulated source to such additional channel elements in the same channel and/or extends to additional modulated sources in separate channels where the number of such channels is N equal to two or greater. The emission wavelength of laser sources in the modulated sources have different positively detuned offsets of the laser emission wavelength relative to the laser active region wavelength, i.e., (λL,i−λPL,L,j>0), and their emission wavelengths form a wavelength grid which may substantially conform to a standardized wavelength grid, such as the ITU grid. These laser sources in the modulated sources with an EIAL are preferentially detuned in the range, for example, of about 20 nm to about 70 nm, preferentially from about 25 nm to about 50 nm, from the active region wavelength of the modulated sources.

93. 发明授权

US08861977B2 Multiplexer and modulation arrangements for multi-carrier optical modems 有权
标题翻译：多载波光调制解调器的多路复用器和调制方案
公开(公告)号：US08861977B2
公开(公告)日：2014-10-14
申请号：US13078888
申请日：2011-04-01
申请人： John D. McNicol , Matthew L. Mitchell , David F. Welch
发明人： John D. McNicol , Matthew L. Mitchell , David F. Welch
IPC分类号： H04J14/00 , H04J14/06 , H04J14/02
CPC分类号： H04J14/02 , H04J14/0256 , H04J14/026 , H04J14/06
摘要： A number of carriers are selected according to a modulation format and symbol rate to realize a superchannel having fixed capacity, for example. At a receive node, the superchannel is optically demultiplexed from a plurality of other superchannels. The plurality of carriers are then supplied to a photodetector circuit, which receives additional light at one of the optical signal carrier wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of the carriers is unnecessary.
摘要翻译：根据调制格式和符号率来选择多个载波，以实现例如具有固定容量的超频道。在接收节点处，超级信道从多个其他超级信道被光解复用。然后将多个载波提供给光电检测器电路，该电路从本地振荡器激光器接收来自光信号载波波长的其中一个附加光。在接收节点中提供模数转换器（ADC），以将从光电检测器输出的电信号转换为数字形式。然后在电域中对ADC的输出进行滤波，使得载波的光解复用是不必要的。

94. 发明授权

US08655169B2 Degradation adaptation network 有权
标题翻译：降解适应网络
公开(公告)号：US08655169B2
公开(公告)日：2014-02-18
申请号：US12239896
申请日：2008-09-29
申请人： Drew D. Perkins , David F. Welch
发明人： Drew D. Perkins , David F. Welch
IPC分类号： H04B17/00
CPC分类号： H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0279 , H04L1/0009 , H04L1/0057
摘要： Consistent with the present disclosure, based on system requirements or in response to an increase in optical signal-to-noise level of an optical channel, such as a WDM channel, additional FEC bits are inserted into and replace selected data payload bits in each frame carried by the channel. The replaced data payload bits may then be transmitted in subsequent frames on the same channel. As a result, the transmitted frames have a reduced data payload rate, but a higher coding gain. Alternatively, the replaced data payload bits may be included in frames transmitted on another optical channel. In that case, the frames carried by the two channels typically have the same bit length or number of bits and may thus be compliant with the frame length requirements of G.709, for example. Preferably, the number of coding bits may be changed dynamically to obtain different coding gains.
摘要翻译：与本公开一致，基于系统要求或响应于诸如WDM信道的光信道的光信噪比水平的增加，附加的FEC比特被插入并替换每个帧中的选定数据有效载荷比特由频道携带然后可以在相同信道上的后续帧中发送替换的数据有效载荷比特。结果，所发送的帧具有减少的数据有效载荷速率，但是编码增益更高。或者，替换的数据有效载荷比特可以包括在另一光信道上发送的帧中。在这种情况下，由两个信道携带的帧通常具有相同的比特长度或比特数，并且因此可以符合例如G.709的帧长度要求。优选地，可以动态地改变编码比特的数量以获得不同的编码增益。

95. 发明授权

US08548333B2 Transceiver photonic integrated circuit 有权
标题翻译：收发器光子集成电路
公开(公告)号：US08548333B2
公开(公告)日：2013-10-01
申请号：US12753833
申请日：2010-04-02
申请人： Radhakrishnan L. Nagarajan , Masaki Kato , Fred A. Kish, Jr. , David F. Welch , Charles H. Joyner
发明人： Radhakrishnan L. Nagarajan , Masaki Kato , Fred A. Kish, Jr. , David F. Welch , Charles H. Joyner
IPC分类号： H04B10/00
CPC分类号： H04J14/02 , H04B10/40 , H04J14/06
摘要： The present invention provides for a transceiver comprising a transmitter portion and a receiver portion. The transmitter portion includes a laser, the laser providing an optical signal having one of a plurality of wavelengths. The optical signal from the laser is modulated to create a first wavelength-division multiplexed signal at an output of the transceiver. The optical signal from the laser is also used by a demultiplexer to demultiplexer a second wavelength-division multiplexed signal at an input of the transceiver. The use of the optical signal from the laser in both modulation and demodulation of wavelength-division multiplexed signals results in a transceiver having fewer discrete components resulting in a compact design and reduced costs.
摘要翻译：本发明提供一种收发器，包括发射机部分和接收机部分。发射机部分包括激光器，激光器提供具有多个波长中的一个的光信号。来自激光器的光信号被调制以在收发器的输出处产生第一波分复用信号。来自激光器的光信号也被解复用器使用，以在收发器的输入端解复用第二波分复用信号。在波分复用信号的调制和解调中使用来自激光器的光信号导致具有较少分立组件的收发器，导致紧凑的设计并降低了成本。

96. 发明授权

US08521020B2 Forward error correction (FEC) enabled photonic integrated circuit (PIC) chips with multiple signal channels 有权
标题翻译：具有多个信号通道的前向纠错（FEC）使能光子集成电路（PIC）芯片
公开(公告)号：US08521020B2
公开(公告)日：2013-08-27
申请号：US12795619
申请日：2010-06-07
申请人： David F. Welch , Drew D. Perkins , Fred A. Kish, Jr. , Ting-Kuang Chiang
发明人： David F. Welch , Drew D. Perkins , Fred A. Kish, Jr. , Ting-Kuang Chiang
IPC分类号： H04B10/04 , H04B10/08
CPC分类号： H01S5/0265 , B82Y20/00 , G02B6/12021 , H01S5/026 , H01S5/0264 , H01S5/0268 , H01S5/06256 , H01S5/06258 , H01S5/0683 , H01S5/1228 , H01S5/2077 , H01S5/22 , H01S5/3408 , H01S5/4025 , H01S5/4031 , H01S5/4087 , H01S5/50 , H04B10/25 , H04B10/2914 , H04B10/50 , H04B10/675 , H04J14/02 , H04J14/0279
摘要： A forward error correction (FEC) communication device that includes a transmitter photonic integrated circuit (TxPIC) or a receiver photonic integrated circuit (RxPIC) and a FEC device for FEC coding at least one channel with a first error rate and at least one additional channel with a second error rate, wherein the first error rate is greater than the second error rate. The TxPIC chip is a monolithic multi-channel chip having an array of modulated sources integrated on the chip, each operating at a different wavelength, wherein at least one of the modulated sources is modulated with a respective FEC encoded signal. The TxPIC also includes an integrated wavelength selective combiner for combining the channels for transport over an optical link.
摘要翻译：包括发射机光子集成电路（TxPIC）或接收机光子集成电路（RxPIC）的前向纠错（FEC）通信设备和用于FEC编码具有第一错误率的至少一个信道和至少一个附加信道的FEC设备具有第二错误率，其中第一错误率大于第二错误率。 TxPIC芯片是具有集成在芯片上的调制源阵列的单片多通道芯片，每个调制源阵列以不同的波长工作，其中至少一个调制源以相应的FEC编码信号进行调制。 TxPIC还包括用于组合用于光链路传输的信道的集成波长选择组合器。

97. 发明授权

US08184929B2 Method of tuning optical components integrated in a monolithic photonic integrated circuit (PIC) 有权
标题翻译：集成在单片光子集成电路（PIC）中的光学元件的调谐方法
公开(公告)号：US08184929B2
公开(公告)日：2012-05-22
申请号：US12345434
申请日：2008-12-29
申请人： Fred A. Kish, Jr. , Charles H. Joyner , David F. Welch , Robert B. Taylor , Alan C. Nilsson
发明人： Fred A. Kish, Jr. , Charles H. Joyner , David F. Welch , Robert B. Taylor , Alan C. Nilsson
IPC分类号： G02F1/01 , G02B6/12 , G02B6/26
CPC分类号： G02B6/12033 , B82Y20/00 , G02B6/02204 , G02B6/12004 , G02B6/12007 , G02B6/12019 , G02B6/12023 , G02B6/12026 , G02B6/12028 , G02B6/124 , G02F1/01725 , G02F2001/0175 , G02F2001/01758 , H01S5/0085 , H01S5/024 , H01S5/02415 , H01S5/02453 , H01S5/02461 , H01S5/02476 , H01S5/026 , H01S5/0261 , H01S5/0264 , H01S5/0265 , H01S5/0268 , H01S5/0425 , H01S5/0612 , H01S5/06256 , H01S5/06258 , H01S5/0683 , H01S5/0687 , H01S5/12 , H01S5/1228 , H01S5/2077 , H01S5/22 , H01S5/2214 , H01S5/2224 , H01S5/227 , H01S5/2272 , H01S5/2275 , H01S5/3408 , H01S5/34306 , H01S5/4025 , H01S5/4031 , H01S5/4087 , H01S5/50 , H04B10/2914 , H04B10/50 , H04B10/506 , H04B10/572 , H04J14/02
摘要： An optical transmitter comprises a monolithic transmitter photonic integrated circuit (TxPIC) chip that includes an array of modulated sources formed on the PIC chip and having different operating wavelengths approximating a standardized wavelength grid and providing signal outputs of different wavelengths. A wavelength selective combiner is formed on the PIC chip having a wavelength grid passband response approximating the wavelength grid of the standardized wavelength grid. The signal outputs of the modulated sources optically coupled to inputs of the wavelength selective combiner to produce a combined signal output from the combiner. A first wavelength tuning element coupled to each of the modulated sources and a second wavelength tuning element coupled to the wavelength selective combiner. A wavelength monitoring unit is coupled to the wavelength selective combiner to sample the combined signal output. A wavelength control system coupled to the first and second wavelength tuning elements and to said wavelength monitoring unit to receive the sampled combined signal output. The wavelength control system adjusts the respective wavelengths of operation of the modulated sources to approximate or to be chirped to the standardized wavelength grid and for adjusting the optical combiner wavelength grid passband response to approximate the standardized wavelength grid.
摘要翻译：光发射机包括单片发射机光子集成电路（TxPIC）芯片，其包括形成在PIC芯片上的调制源的阵列，并且具有接近标准化波长网格并提供不同波长的信号输出的不同工作波长。在具有近似于标准化波长网格的波长网格的波长网格通带响应的PIC芯片上形成波长选择性组合器。调制源的信号输出光耦合到波长选择组合器的输入，以产生从组合器输出的组合信号。耦合到每个调制源的第一波长调谐元件和耦合到波长选择组合器的第二波长调谐元件。波长监测单元耦合到波长选择组合器以对组合的信号输出进行采样。波长控制系统耦合到第一和第二波长调谐元件以及所述波长监视单元以接收采样的组合信号输出。波长控制系统调整调制源的各个波长的波长近似于或被啁啾到标准化波长网格，并且用于调整光合并波长网格通带响应以近似标准化的波长网格。

98. 发明申请

US20120057873A1 OPTICAL COMMUNICATION SYSTEM HAVING LOW LATENCY 有权
标题翻译：具有低延迟的光通信系统
公开(公告)号：US20120057873A1
公开(公告)日：2012-03-08
申请号：US12875672
申请日：2010-09-03
申请人： PAUL R. MORKEL , David F. Welch
发明人： PAUL R. MORKEL , David F. Welch
IPC分类号： H04J14/02
CPC分类号： H04J14/0221 , H04B10/2916
摘要： Consistent with the present disclosure, an optical communication system is provided in which client data is input to a first node and output from a second node, spaced from the first node, with little delay. In one example, the delay is reduced by including higher order Raman amplifiers that provide a substantially uniform gain along the length of a fiber optic link, thereby reducing the number of EDFAs that may otherwise be installed along the optical fiber link or eliminating such EDFAs entirely. In another example, FEC encoding and decoding are not employed, thereby reducing the delay even further.
摘要翻译：与本公开一致，提供了一种光通信系统，其中客户端数据被输入到第一节点并且从与第一节点间隔开的第二节点输出几乎没有延迟。在一个示例中，通过包括沿着光纤链路的长度提供基本上均匀的增益的较高阶拉曼放大器来减小延迟，由此减少否则可以沿着光纤链路安装的EDFA的数量或完全消除这样的EDFA 。在另一示例中，不使用FEC编码和解码，从而进一步减少延迟。

99. 发明申请

US20110008039A1 FORWARD ERROR CORRECTION (FEC) ENABLED PHOTONIC INTEGRATED CIRCUIT (PIC) CHIPS WITH MULTIPLE SIGNAL CHANNELS 有权
标题翻译：带有多个信号通道的前向纠错（FEC）启用光电集成电路（PIC）
公开(公告)号：US20110008039A1
公开(公告)日：2011-01-13
申请号：US12795619
申请日：2010-06-07
申请人： David F. Welch , Drew D. Perkins , Fred A. Kish, JR. , Ting-Kuang Chiang
发明人： David F. Welch , Drew D. Perkins , Fred A. Kish, JR. , Ting-Kuang Chiang
IPC分类号： H04B10/04
CPC分类号： H01S5/0265 , B82Y20/00 , G02B6/12021 , H01S5/026 , H01S5/0264 , H01S5/0268 , H01S5/06256 , H01S5/06258 , H01S5/0683 , H01S5/1228 , H01S5/2077 , H01S5/22 , H01S5/3408 , H01S5/4025 , H01S5/4031 , H01S5/4087 , H01S5/50 , H04B10/25 , H04B10/2914 , H04B10/50 , H04B10/675 , H04J14/02 , H04J14/0279
摘要： A forward error correction (FEC) communication device that includes a transmitter photonic integrated circuit (TxPIC) or a receiver photonic integrated circuit (RxPIC) and a FEC device for FEC coding at least one channel with a first error rate and at least one additional channel with a second error rate, wherein the first error rate is greater than the second error rate. The TxPIC chip is a monolithic multi-channel chip having an array of modulated sources integrated on the chip, each operating at a different wavelength, wherein at least one of the modulated sources is modulated with a respective FEC encoded signal. The TxPIC also includes an integrated wavelength selective combiner for combining the channels for transport over an optical link.
摘要翻译：包括发射机光子集成电路（TxPIC）或接收机光子集成电路（RxPIC）的前向纠错（FEC）通信设备和用于FEC编码具有第一错误率的至少一个信道和至少一个附加信道的FEC设备具有第二错误率，其中第一错误率大于第二错误率。 TxPIC芯片是具有集成在芯片上的调制源阵列的单片多通道芯片，每个调制源阵列以不同的波长工作，其中至少一个调制源以相应的FEC编码信号进行调制。 TxPIC还包括用于组合用于光链路传输的信道的集成波长选择组合器。

100. 发明授权

US07734191B1 Forward error correction (FEC) enabled photonic integrated circuit (PICs) chips with multiple signal channels 有权
标题翻译：具有多个信号通道的前向纠错（FEC）使能光子集成电路（PIC）芯片
公开(公告)号：US07734191B1
公开(公告)日：2010-06-08
申请号：US11609331
申请日：2006-12-11
申请人： David F. Welch , Drew D. Perkins , Fred A. Kish, Jr. , Ting-Kuang Chiang
发明人： David F. Welch , Drew D. Perkins , Fred A. Kish, Jr. , Ting-Kuang Chiang
IPC分类号： H04B10/00 , H04B10/04 , H04B10/08
CPC分类号： H01S5/0265 , B82Y20/00 , G02B6/12021 , H01S5/026 , H01S5/0264 , H01S5/0268 , H01S5/06256 , H01S5/06258 , H01S5/0683 , H01S5/1228 , H01S5/2077 , H01S5/22 , H01S5/3408 , H01S5/4025 , H01S5/4031 , H01S5/4087 , H01S5/50 , H04B10/25 , H04B10/2914 , H04B10/50 , H04B10/675 , H04J14/02 , H04J14/0279
摘要： A forward error correction (FEC) communication device that includes a transmitter photonic integrated circuit (TxPIC) or a receiver photonic integrated circuit (RxPIC) and a FEC device for FEC coding at least one channel with a first error rate and at least one additional channel with a second error rate, wherein the first error rate is greater than the second error rate. The TxPIC chip is a monolithic multi-channel chip having an array of modulated sources integrated on the chip, each operating at a different wavelength, wherein at least one of the modulated sources is modulated with a respective FEC encoded signal. The TxPIC also includes an integrated wavelength selective combiner for combining the channels for transport over an optical link.
摘要翻译：包括发射机光子集成电路（TxPIC）或接收机光子集成电路（RxPIC）的前向纠错（FEC）通信设备和用于FEC编码具有第一错误率的至少一个信道和至少一个附加信道的FEC设备具有第二错误率，其中第一错误率大于第二错误率。 TxPIC芯片是具有集成在芯片上的调制源阵列的单片多通道芯片，每个调制源阵列以不同的波长工作，其中至少一个调制源以相应的FEC编码信号进行调制。 TxPIC还包括用于组合用于光链路传输的信道的集成波长选择组合器。

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