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61. 发明授权

US07016571B2 Method and apparatus for a polarization insensitive arrayed waveguide grating (AWG) 有权
标题翻译：用于偏振不敏感阵列波导光栅（AWG）的方法和装置
公开(公告)号：US07016571B2
公开(公告)日：2006-03-21
申请号：US11016241
申请日：2004-12-17
申请人： Charles H. Joyner , Mark J. Missey , Radhakrishnan L. Nagarajan , Fred A. Kish, Jr.
发明人： Charles H. Joyner , Mark J. Missey , Radhakrishnan L. Nagarajan , Fred A. Kish, Jr.
IPC分类号： G02B6/34
CPC分类号： G02B6/12011 , G02B6/12016 , G02B6/12019 , G02B6/12023 , G02B6/132 , G02B6/42 , G02B2006/12097 , G02B2006/12176 , H01S5/026 , H01S5/0264 , H01S5/0265 , H01S5/0268 , H01S5/1014 , H01S5/2213 , H01S5/2231 , H01S5/227 , H01S5/4031 , H01S5/4087
摘要： An arrayed waveguide grating (AWG) comprises at least two free space regions, a plurality of grating arms extending between the two space regions, a passivation layer formed over the arrayed waveguide grating and a plurality of inputs at least to one of the free space regions to receive a plurality of channel signals separated by a predetermined channel spacing. A depth of the passivation layer chosen by providing a TE to TM wavelength shift between TE and TM modes propagating through the arrayed waveguide grating being approximately less than or equal to 20% of a magnitude of the channel spacing.
摘要翻译：阵列波导光栅（AWG）包括至少两个自由空间区域，在两个空间区域之间延伸的多个光栅臂，在阵列波导光栅上形成的钝化层，以及至少一个自由空间区域以接收由预定信道间隔分开的多个信道信号。通过在通过阵列波导光栅传播的TE和TM模式之间提供TE到TM波长移位而选择的钝化层的深度大约小于或等于信道间隔幅度的20％。

62. 发明授权

US06985648B2 Method of in-wafer testing of monolithic photonic integrated circuits (PICs) formed in a semiconductor wafer 有权
标题翻译：在半导体晶片中形成的单片光子集成电路（PIC）的晶片内测试方法
公开(公告)号：US06985648B2
公开(公告)日：2006-01-10
申请号：US10988067
申请日：2004-11-12
申请人： Fred A. Kish, Jr. , Mark J. Missey , Radhakrishnan L. Nagarajan , Frank H. Peters , Richard P. Schneider , Charles H. Joyner
发明人： Fred A. Kish, Jr. , Mark J. Missey , Radhakrishnan L. Nagarajan , Frank H. Peters , Richard P. Schneider , Charles H. Joyner
IPC分类号： G02B6/12 , H04B10/08
CPC分类号： G02B6/12011 , B82Y20/00 , G01R31/31728 , G01R31/318511 , G02B6/12004 , G02B6/12007 , G02B6/12019 , G02B6/12021 , G02B6/12023 , G02B6/12026 , G02B6/12028 , G02B6/12033 , G02B6/131 , G02B6/136 , G02B6/4204 , G02F1/01725 , G02F2001/0175 , G02F2001/01758 , G02F2203/69 , H01L31/125 , H01S5/0014 , H01S5/0085 , H01S5/02248 , H01S5/026 , H01S5/0262 , H01S5/0264 , H01S5/0265 , H01S5/0268 , H01S5/06256 , H01S5/06258 , H01S5/0683 , H01S5/06832 , H01S5/12 , H01S5/1228 , H01S5/2077 , H01S5/22 , H01S5/3408 , H01S5/4031 , H01S5/4087 , H01S5/50 , H04B10/2914 , H04B10/50 , H04J14/02 , H04J14/0246 , H04J14/025 , H04J14/0258 , H04J14/0265 , H04J14/0276 , H04J14/0282
摘要： A method of in-wafer testing is provided for a monolithic photonic integrated circuit (PIC) formed in a semiconductor wafer where each such in-wafer circuit comprises two or more integrated electro-optic components, one of each in tandem forming a signal channel in the circuit. The method includes the provision of a first integrated photodetector at a rear end of each signal channel and a second integrated photodetector at forward end of each signal channel. Then, the testing is accomplished, first, by sequentially operating a first of a selected channel electro-optic component in a selected circuit to monitor light output from a channel via its first corresponding channel photodetector and adjusting its operating characteristics by detecting that channel electro-optic component output via its second corresponding channel photodetector to provide first calibration data. Second, by sequentially operating a second of a selected channel electro-optic component in the selected circuit to monitor signal output from the second selected channel electro-optic component via its second corresponding channel photodetector and adjusting its operating characteristics by detecting that channel electro-optic component output via its second corresponding channel photodetector to provide second calibration data. The first and second calibration data for each circuit channel for the selected circuit are then stored for future reference.
摘要翻译：提供了一种晶片内测试方法，用于形成在半导体晶片中的单片光子集成电路（PIC），其中每个这样的晶片内电路包括两个或更多个集成的电光部件，其中每一个串联形成信号通道电路。该方法包括在每个信号通道的后端提供第一集成光电检测器，并在每个信号通道的前端提供第二集成光电检测器。然后，首先，通过顺序地操作所选择的电路中的所选择的通道电光部件中的第一个，以经由其第一对应的通道光电检测器监视从通道输出的光，并通过检测该通道电光元件来调整其工作特性，通过其第二对应通道光电检测器输出光学部件以提供第一校准数据。其次，通过在所选择的电路中顺序地操作所选择的通道电光部件中的第二个，以通过其第二对应的通道光电检测器监测从第二选定的通道电光部件输出的信号，并通过检测该通道电光通过其第二对应通道光电检测器输出分量，以提供第二校准数据。然后存储用于所选电路的每个电路通道的第一和第二校准数据以供将来参考。

63. 发明授权

US09419742B2 Optical communication system having tunable sources 有权
标题翻译：具有可调谐源的光通信系统
公开(公告)号：US09419742B2
公开(公告)日：2016-08-16
申请号：US13340982
申请日：2011-12-30
申请人： Radhakrishnan L. Nagarajan , Masaki Kato , Michael Francis Van Leeuwen , Timothy Butrie
发明人： Radhakrishnan L. Nagarajan , Masaki Kato , Michael Francis Van Leeuwen , Timothy Butrie
IPC分类号： G02B6/12 , H04J14/02 , H04B10/50
CPC分类号： H04J14/0254 , G02B6/12019 , H04B10/506
摘要： Consistent with one example of the disclosed implementations, a photonic integrated circuit (PIC) may be provided that includes s group of lasers and an arrayed waveguide grating (AWG) disposed on a substrate. Each laser in the group may supply an optical signal, such that each optical signal has a different wavelength. Each laser may be tunable to at least two designated wavelengths, which are separated from one another by a free spectral range (FSR) of the AWG. As a result, the optical signals provided from each laser may be combined by the AWG, regardless of which designated wavelength the optical signals have. Accordingly, a PIC may be provided that has a relatively simple construction but can supply optical signals having tunable wavelengths.
摘要翻译：与所公开的实施例的一个示例一致，可以提供包括s组激光器和设置在衬底上的阵列波导光栅（AWG）的光子集成电路（PIC）。组中的每个激光器可以提供光信号，使得每个光信号具有不同的波长。每个激光器可以被调谐到至少两个指定的波长，它们通过AWG的自由光谱范围（FSR）彼此分开。结果，从每个激光器提供的光信号可以由AWG组合，而不管光信号具有哪个指定波长。因此，可以提供具有相对简单结构但可提供具有可调波长的光信号的PIC。

64. 发明授权

US09158068B2 Wide passband AWG 有权
标题翻译：宽通带AWG
公开(公告)号：US09158068B2
公开(公告)日：2015-10-13
申请号：US13177363
申请日：2011-07-06
申请人： Masaki Kato , Radhakrishnan L. Nagarajan
发明人： Masaki Kato , Radhakrishnan L. Nagarajan
IPC分类号： G02B6/34 , G02B6/12
CPC分类号： G02B6/12011
摘要： Consistent with the present disclosure, an AWG is provided that has grating waveguide groupings that extend between a first free space region and a second free space region. The difference in length (ΔL) between successive grating waveguides differs for each grouping of grating waveguides, such that, for example, the ΔL associated with a given grating waveguide grouping is not an integer multiple of any of the other grating waveguide groupings. The grating waveguide groupings direct images having relatively small wavelength differences to a given output waveguide, and each grating waveguide grouping has an associated passband, which is similar to that of the conventional AWG. Unlike the conventional AWG, however, multiple grating waveguide groupings are included in the same AWG, such that the spectra associated with the grating waveguide groupings combine to provide a transmission characteristic having a passband that is greater than any individual passband. Accordingly, even if the optical signal wavelengths vary or are offset from the center wavelength of the passband, such wavelengths may still be transmitted with less loss.
摘要翻译：根据本公开，提供了AWG，其具有在第一自由空间区域和第二自由空间区域之间延伸的光栅波导分组。对于每组光栅波导，连续光栅波导之间的长度差（＆Dgr; L）不同，例如，与给定光栅波导组合相关联的＆Dgr; L不是任何其他光栅波导的整数倍分组。光栅波导分组将具有相对小的波长差的图像分配给给定的输出波导，并且每个光栅波导组具有相关的通带，其类似于常规的AWG。然而，与传统AWG不同，多个光栅波导分组被包括在相同的AWG中，使得与光栅波导分组相关联的光谱组合以提供具有大于任何单个通带的通带的传输特性。因此，即使光信号波长变化或偏离通带的中心波长，这样的波长仍然可以以较少的损耗传输。

65. 发明授权

US09025912B2 Polarization material on an optical multiplexer or an optical demultiplexer 有权
标题翻译：光复用器或光解复用器上的极化材料
公开(公告)号：US09025912B2
公开(公告)日：2015-05-05
申请号：US13537725
申请日：2012-06-29
申请人： Radhakrishnan L. Nagarajan , Masaki Kato
发明人： Radhakrishnan L. Nagarajan , Masaki Kato
IPC分类号： G02B6/00 , G02B6/26
CPC分类号： G02B6/26 , G02B6/12014 , G02B6/12019 , G02B6/12023
摘要： An optical device may include a substrate and an arrayed waveguide grating provided on the substrate. The arrayed waveguide grating may include a first slab or a second slab and multiple waveguides extending therebetween. The optical device may also include a layer of material provided on one of the first slab or second slab. The layer of material may have a thickness such that first light may have a first polarization is absorbed by the material and second light may have a second polarization passes through the one of the first slab or the second slab.
摘要翻译：光学器件可以包括衬底和设置在衬底上的阵列波导光栅。阵列波导光栅可以包括第一平板或第二平板以及在它们之间延伸的多个波导。光学装置还可以包括设置在第一板或第二板之一上的一层材料。材料层可以具有这样的厚度，使得第一光可以具有第一极化被材料吸收，并且第二光可以具有穿过第一板或第二板之一的第二极化。

66. 发明授权

US08781324B2 Optical receiver integrated on a substrate 有权
标题翻译：集成在基板上的光接收器
公开(公告)号：US08781324B2
公开(公告)日：2014-07-15
申请号：US12816599
申请日：2010-06-16
申请人： Radhakrishnan L. Nagarajan , Masaki Kato , Jeffrey T. Rahn
发明人： Radhakrishnan L. Nagarajan , Masaki Kato , Jeffrey T. Rahn
IPC分类号： H04J4/00 , H04J14/06 , H04B10/06
CPC分类号： G02B6/12004 , G02B6/12009 , G02B6/264 , G02B2006/12126 , H04J14/02 , H04J14/06
摘要： A coherent optical receiver circuit is disclosed in which various components of the optical receiver may be provided or integrated, in one example, on a common substrate. Further integration is achieved by incorporating various optical demultiplexer designs that are relatively compact and conserve space on the surface of the substrate. The optical receiver circuit may be used to demultiplex quadrature phase shift keying (QPSK) optical signals.
摘要翻译：公开了一种相干光接收器电路，其中在一个示例中，可以在公共基板上提供或集成光接收器的各种部件。通过结合相对紧凑的各种光解复用器设计并节省衬底表面上的空间来实现进一步的集成。光接收机电路可用于解复用正交相移键控（QPSK）光信号。

67. 发明授权

US08233510B2 Dual output laser source 有权
标题翻译：双输出激光源
公开(公告)号：US08233510B2
公开(公告)日：2012-07-31
申请号：US12363826
申请日：2009-02-02
申请人： Charles H. Joyner , Radhakrishnan L. Nagarajan , Peter W. Evans , Masaki Kato
发明人： Charles H. Joyner , Radhakrishnan L. Nagarajan , Peter W. Evans , Masaki Kato
IPC分类号： H01S3/10
CPC分类号： H04B10/532 , H01S5/0085 , H01S5/0265 , H01S5/12 , H01S5/4012 , H04B10/505 , H04B10/5561
摘要： A dual output laser source provided on a substrate outputs light from a first and second output. A portion of the light generated by the laser is supplied to a first modulator via the first output. A second portion of the light generated by the laser is supplied to a second modulator via the second output. The first modulator is provided on the substrate and generates a first modulated signal. The second modulator is also provided on the substrate and generates a second modulated signal. Each output of the laser is used to provide continuous wave light sources to components on photonic integrated circuit.
摘要翻译：设置在基板上的双输出激光源输出来自第一和第二输出的光。由激光产生的光的一部分经由第一输出被提供给第一调制器。由激光产生的光的第二部分经由第二输出提供给第二调制器。第一调制器设置在衬底上并产生第一调制信号。第二调制器也设置在衬底上并产生第二调制信号。激光器的每个输出用于向光子集成电路上的组件提供连续波光源。

68. 发明申请

US20120057874A1 WAVELENGTH DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORK 有权
公开(公告)号：US20120057874A1
公开(公告)日：2012-03-08
申请号：US12987449
申请日：2011-01-10
申请人： Radhakrishnan L. Nagarajan , Christopher C. Liou , Masaki Kato
发明人： Radhakrishnan L. Nagarajan , Christopher C. Liou , Masaki Kato
IPC分类号： H04J14/02
CPC分类号： H04J14/0282 , H04J14/0246 , H04J14/025 , H04J14/0265 , H04J14/0298 , H04J2014/0253
摘要： Consistent with the present disclosure, an optical communication system, such as a passive optical network (PON), is provided that includes an optical line terminal (OLT) and a plurality of optical network units (ONUs). The OLT includes a plurality of photonic integrated circuits that have both optical transmitters and receivers provided therein. Accordingly, the OLT may have fewer components and a simpler, more reliable and cost-effective design than a conventional OLT including discrete components. In addition, various ONU configurations are provided that also have a simple design and fewer components. Thus, ONUs consistent with the present disclosure may also have reduced costs.

69. 发明授权

US07394953B1 Configurable integrated optical combiners and decombiners 有权
标题翻译：可配置的集成光学组合器和分解器
公开(公告)号：US07394953B1
公开(公告)日：2008-07-01
申请号：US11734259
申请日：2007-04-11
申请人： Radhakrishnan L. Nagarajan , Masaki Kato , Peter W. Evans , Jacco L. Pleumeekers , Mehrdad Ziari
发明人： Radhakrishnan L. Nagarajan , Masaki Kato , Peter W. Evans , Jacco L. Pleumeekers , Mehrdad Ziari
IPC分类号： G02B6/34 , G02B6/26 , G02B6/42
CPC分类号： G02B6/12033 , G02B6/12019
摘要： System, devices and methods are described that provide an integrated optical decombiner or optical combiner having both unamplified paths and amplified paths on which power monitoring and control may be located. A preferred multiplexing/demultiplexing optical path through the combiner/decombiner and a corresponding waveguide output/input is identified and optically coupled to a piece of fiber. Temperature control may be provided to tune an arrayed waveguide grating within the combiner/decombiner and minimize wavelength drift therein. Integrated power monitoring may be employed on one or more of the amplified waveguide paths to ensure that a preferred power level or range is maintained on an optical signal.
摘要翻译：描述了系统，装置和方法，其提供集成光学分解器或光学组合器，其具有可放置功率监视和控制的未放大路径和放大路径。通过组合器/分解器和对应的波导输出/输入的优选复用/解复用光路被识别并光学耦合到一片光纤。可以提供温度控制以调谐组合器/分解器内的阵列波导光栅并使其中的波长漂移最小化。可以在一个或多个放大的波导路径上采用集成功率监视，以确保在光信号上保持优选的功率电平或范围。

70. 发明授权

US09261635B2 Rotator external to photonic integrated circuit 有权
标题翻译：旋转器外部光子集成电路
公开(公告)号：US09261635B2
公开(公告)日：2016-02-16
申请号：US13537805
申请日：2012-06-29
申请人： Radhakrishnan L. Nagarajan , Masaki Kato , Jeffrey T. Rahn , Alan C. Nilsson , Kuang-Tsan Wu
发明人： Radhakrishnan L. Nagarajan , Masaki Kato , Jeffrey T. Rahn , Alan C. Nilsson , Kuang-Tsan Wu
IPC分类号： G02F1/01 , G02B5/30 , G02B5/32 , G01J1/04 , H04J14/06 , G02B6/12 , G02B6/126 , G01J1/42 , H04J14/02
CPC分类号： G02B5/30 , G01J1/0425 , G01J1/0429 , G01J1/4228 , G02B5/32 , G02B6/12007 , G02B6/12019 , G02B6/126 , H04J14/02 , H04J14/0279 , H04J14/06
摘要： An optical system may include a polarization beam splitter having an input that receives multiple optical signals, a first output and a second output. The first output may provide components of the multiple optical signals having a first polarization. The second output may provide components of the multiple optical signals having a second polarization. The optical system may include a rotator having an input that receives the components to rotate the first polarization such that each of the components has the second polarization, and an output to supply components as rotated components.The optical system may also include an optical circuit including a substrate. The rotator may be separate from the substrate. The optical circuit may include an optical demultiplexer circuit provided on the substrate to receive the rotated components and the components.
摘要翻译：光学系统可以包括具有接收多个光信号，第一输出和第二输出的输入的偏振分束器。第一输出可以提供具有第一偏振的多个光信号的分量。第二输出可以提供具有第二偏振的多个光信号的分量。光学系统可以包括旋转器，其具有接收组件以旋转第一偏振的输入，使得每个组件具有第二偏振，以及用于将组件作为旋转分量供给的输出。光学系统还可以包括包括衬底的光学电路。旋转体可以与基底分开。光电路可以包括设置在基板上以接收旋转的部件和部件的光解复用器电路。

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