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公开(公告)号：US08204388B2
公开(公告)日：2012-06-19
申请号：US12496514
申请日：2009-07-01
IPC分类号： H04B10/06
CPC分类号： H03F1/083 , H01L31/02019 , H01L31/103 , H01L31/105 , H03F3/087
摘要： Consistent the present disclosure, a receive circuit is provided that includes a balanced detector portion and a transimpedance amplifier (TIA). The anode of one photodiode is connected to the cathode of the other by a bonding pad, which supplies the sum of the currents generated in each photodiode to an input of the TIA. Thus, the TIA may, for example, have a single input, as opposed to multiple inputs, thereby reducing the number of connections so that the photodiodes and the TIA may be integrated onto a smaller die. In addition, since there are few connections, fewer TIAs are required and differential stages are unnecessary. Power consumption is thus reduced, and, since the photodiode current is fed through one input to the TIA, fewer feedback resistors are required, thereby reducing thermal noise. In addition, since the anode of one photodiode is connected to the cathode of the other, the dark current generated in each flows in opposite directions, and is therefore effectively cancelled out. Since one input is provided, impedance matching with other inputs is unnecessary, nor is additional DC biasing circuitry needed. As described in greater detail below, an example of the present disclosure includes a bonding pad, which connects the two photodiodes and provides the input current to the TIA.
摘要翻译： 与本公开一致，提供了包括平衡检测器部分和跨阻抗放大器（TIA）的接收电路。 一个光电二极管的阳极通过焊盘连接到另一个的阴极，焊盘将每个光电二极管中产生的电流之和提供给TIA的输入端。 因此，TIA可以例如具有与多个输入相反的单个输入，从而减少连接的数量，使得光电二极管和TIA可以集成到较小的管芯上。 另外，由于几乎没有连接，需要较少的TIA，而不需要差分级。 因此降低功耗，并且由于光电二极管电流通过一个输入馈送到TIA，所以需要更少的反馈电阻，从而降低热噪声。 此外，由于一个光电二极管的阳极与另一个光电二极管的阴极连接，所以每个光电二极管中产生的暗电流沿相反的方向流动，因此被有效地抵消。 由于提供了一个输入，因此与其他输入的阻抗匹配是不必要的，也不需要额外的DC偏置电路。 如下面更详细描述的，本公开的示例包括接合焊盘，其连接两个光电二极管并将输入电流提供给TIA。
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公开(公告)号：US09419742B2
公开(公告)日：2016-08-16
申请号：US13340982
申请日：2011-12-30
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。
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公开(公告)号：US09158068B2
公开(公告)日：2015-10-13
申请号：US13177363
申请日：2011-07-06
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。
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公开(公告)号：US09031412B2
公开(公告)日：2015-05-12
申请号：US12612646
申请日：2009-11-04
申请人： Radhakrishnan L. Nagarajan , Fred A. Kish, Jr. , David F. Welch , Drew D. Perkins , Masaki Kato
发明人： Radhakrishnan L. Nagarajan , Fred A. Kish, Jr. , David F. Welch , Drew D. Perkins , Masaki Kato
IPC分类号： H04J14/02 , H04B10/50 , G02B6/12 , B82Y20/00 , H01S5/024 , H01S5/223 , H01S5/40 , G02B6/28 , G02B6/293 , H01S5/00 , H01S5/022 , H01S5/026 , H01S5/0683 , H01S5/10 , H01S5/12 , H01S5/343
CPC分类号： G02B6/12033 , B82Y20/00 , G02B6/12019 , G02B6/2813 , G02B6/293 , G02B6/29317 , G02B6/29338 , G02B6/29352 , H01S5/005 , H01S5/0085 , H01S5/02248 , H01S5/024 , H01S5/0261 , H01S5/0265 , H01S5/0268 , H01S5/0683 , H01S5/1032 , H01S5/12 , H01S5/1221 , H01S5/2231 , H01S5/34306 , H01S5/4031 , H01S5/4087 , H04B10/506
摘要： A coolerless photonic integrated circuit (PIC), such as a semiconductor electro-absorption modulator/laser (EML) or a coolerless optical transmitter photonic integrated circuit (TxPIC), may be operated over a wide temperature range at temperatures higher then room temperature without the need for ambient cooling or hermetic packaging. Since there is large scale integration of N optical transmission signal WDM channels on a TxPIC chip, a new DWDM system approach with novel sensing schemes and adaptive algorithms provides intelligent control of the PIC to optimize its performance and to allow optical transmitter and receiver modules in DWDM systems to operate uncooled. Moreover, the wavelength grid of the on-chip channel laser sources may thermally float within a WDM wavelength band where the individual emission wavelengths of the laser sources are not fixed to wavelength peaks along a standardized wavelength grid but rather may move about with changes in ambient temperature. However, control is maintained such that the channel spectral spacing between channels across multiple signal channels, whether such spacing is periodic or aperiodic, between adjacent laser sources in the thermally floating wavelength grid are maintained in a fixed relationship. Means are then provided at an optical receiver to discover and lock onto floating wavelength grid of transmitted WDM signals and thereafter demultiplex the transmitted WDM signals for OE conversion.
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5.发明授权公开(公告)号：US09025912B2
公开(公告)日：2015-05-05
申请号：US13537725
申请日：2012-06-29
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。
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公开(公告)号：US08781324B2
公开(公告)日：2014-07-15
申请号：US12816599
申请日：2010-06-16
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。
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公开(公告)号：US08705904B2
公开(公告)日：2014-04-22
申请号：US12263471
申请日：2008-11-01
申请人： Fred A. Kish, Jr. , Mehrdad Ziari , Radhakrishnan L. Nagarajan , Masaki Kato , Vincent G. Dominic , Sanjeev Murthy , Alan Nilsson
发明人： Fred A. Kish, Jr. , Mehrdad Ziari , Radhakrishnan L. Nagarajan , Masaki Kato , Vincent G. Dominic , Sanjeev Murthy , Alan Nilsson
CPC分类号： G02B6/12004 , G02B6/12019 , G02B6/4249 , H01S5/02248 , H01S5/0268 , H01S5/4087 , H04J14/02
摘要： Consistent with the present disclosure, optical devices are provided along different optical paths in a photonic integrated circuit (PIC). The optical components have different optical losses associated therewith so that optical signals propagating in the optical paths have desired power levels, which may be uniform, for example.
摘要翻译： 根据本公开，光子器件沿着光子集成电路（PIC）中的不同光路提供。 光学部件具有与其相关的不同的光学损耗，使得在光路中传播的光信号具有期望的功率电平，例如可以是均匀的。
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公开(公告)号：US08280255B2
公开(公告)日：2012-10-02
申请号：US12646942
申请日：2009-12-23
IPC分类号： H04J14/02
CPC分类号： H04B10/506 , H04B10/564
摘要： The present invention provides a system, apparatus and method to provide for amplification at various points along one or more optical paths of a photonic integrated circuit. According to various embodiments of the invention, the photonic integrated circuit includes a plurality of optical devices having associated characteristics which may have lead to optical signal degradation. One or more optical amplifiers provided along one or more optical paths of the photonic integrated circuit compensate for such signal degradation, resulting in a highly configurable photonic integrated circuit. The various optical devices of the photonic integrated circuit may be provided on a single substrate.
摘要翻译： 本发明提供一种用于在沿着光子集成电路的一个或多个光路的各个点处进行放大的系统，装置和方法。 根据本发明的各种实施例，光子集成电路包括具有可能导致光信号劣化的相关特性的多个光学器件。 沿着光子集成电路的一个或多个光路提供的一个或多个光放大器补偿这种信号劣化，导致高度可配置的光子集成电路。 光子集成电路的各种光学器件可以设置在单个衬底上。
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公开(公告)号：US08233510B2
公开(公告)日：2012-07-31
申请号：US12363826
申请日：2009-02-02
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。
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公开(公告)号：US20120057874A1
公开(公告)日：2012-03-08
申请号：US12987449
申请日：2011-01-10
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.
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