公开(公告)号：US09812842B2

公开(公告)日：2017-11-07

申请号：US15189598

申请日：2016-06-22

Applicant: Oracle International Corporation

Inventor： Ivan Shubin ,  Xuezhe Zheng ,  Jin Yao ,  Jin-Hyoung Lee ,  Jock T. Bovington ,  Shiyun Lin ,  Ashok V. Krishnamoorthy

IPC: H01S3/08 ,  H01S5/026 ,  H01S5/30 ,  H01S5/12 ,  H01S5/02 ,  H01S5/10 ,  H01S5/022 ,  H01S5/14

CPC classification number: H01S5/14 ,  H01S3/08059 ,  H01S5/02252 ,  H01S5/0228 ,  H01S5/1028 ,  H01S5/1092 ,  H01S5/12 ,  H01S5/141

Abstract: A hybrid optical source comprises an optical gain chip containing an optical gain material that provides an optical signal, and an optical reflector chip including an optical reflector. It also includes a semiconductor-on-insulator (SOI) chip, which comprises a semiconductor layer having a planarized surface facing the semiconductor reflector. The semiconductor layer includes: an optical coupler to redirect the optical signal to and from the planarized surface; and an optical waveguide to convey the optical signal from the optical coupler. While assembling these chips, a height of the optical gain material is referenced against the planarized surface of the semiconductor layer, a height of the optical reflector is referenced against the planarized surface of the semiconductor layer, and the optical reflector is aligned with the optical coupler, so that the optical signal emanating from the optical gain material is reflected by the optical reflector and into the optical coupler.

公开(公告)号：US09768587B1

公开(公告)日：2017-09-19

申请号：US15341691

申请日：2016-11-02

Applicant: Oracle International Corporation

Inventor： Xuezhe Zheng ,  Jin Yao ,  Ying Luo ,  Ashok V. Krishnamoorthy

IPC: H01S5/00 ,  H01S5/10 ,  H01S5/125 ,  H01S5/30 ,  H01S5/50 ,  H01S5/14 ,  H01S5/06 ,  H01S5/187

CPC classification number: H01S5/1092 ,  H01S3/106 ,  H01S5/0071 ,  H01S5/0268 ,  H01S5/0608 ,  H01S5/141 ,  H01S5/142 ,  H01S5/187 ,  H01S5/4087 ,  H01S5/5027

Abstract: The disclosed embodiments provide a tunable laser that includes a set of M reflective silicon optical amplifiers (RSOAs) and a set of N narrow-band reflectors. It also includes a silicon-photonic optical switch, having M amplifier ports, which are coupled through a set of M optical waveguides to the set of M RSOAs, and N reflector ports, which are coupled to the set of N narrow-band reflectors. The tunable laser also includes a switching mechanism that facilitates coupling at least one selected amplifier port from the M amplifier ports with a selected reflector port from the N reflector ports, thereby causing an RSOA coupled to the selected amplifier port to form a lasing cavity with a narrow-band reflector coupled to the selected reflector port. The tunable laser also includes a laser output, which is optically coupled to the lasing cavity.

公开(公告)号：US20170223437A1

公开(公告)日：2017-08-03

申请号：US15013857

申请日：2016-02-02

Applicant: Oracle International Corporation

Inventor： Daniel Y. Lee ,  Xuezhe Zheng ,  Ashok V. Krishnamoorthy

IPC: H04Q11/00 ,  H04J14/02 ,  H04J14/06

CPC classification number: H04Q11/0005 ,  H04B10/671 ,  H04B10/675 ,  H04J14/0212 ,  H04J14/06 ,  H04Q2011/0009 ,  H04Q2011/0016

Abstract: An optical receiver is described. Using silicon-photonic components that support a single polarization, the output of an optical receiver is independent of the polarization of an optical signal. In particular, using a polarization-diversity technique, the two orthogonal polarizations in a single-mode optical fiber are split in two and processed independently. For example, the two optical signals may be provided by a polarization-splitting grating coupler. Subsequently, a redistribution element provides mixtures of the two optical signals. Next, a wavelength channel in the two mixed optical signals is selected using a wavelength-selective filter (for example, using ring-resonator drop filters or an echelle grating) and converted into an electrical signal at an optical detector (such as a photodetector) to achieve polarization-independent operation.

公开(公告)号：US09698564B1

公开(公告)日：2017-07-04

申请号：US15019631

申请日：2016-02-09

Applicant: Oracle International Corporation

Inventor： Ivan Shubin ,  Xuezhe Zheng ,  Jin-Hyoung Lee ,  Ashok V. Krishnamoorthy

IPC: G02B6/12 ,  H01S5/026 ,  G02B6/30 ,  G02B6/42 ,  H01S5/10 ,  H01S5/02 ,  H01S5/30

CPC classification number: H01S5/026 ,  G02B6/00 ,  G02B6/12 ,  G02B6/30 ,  G02B6/42 ,  G02B6/4292 ,  H01S5/005 ,  H01S5/0206 ,  H01S5/02252 ,  H01S5/02284 ,  H01S5/1014 ,  H01S5/14 ,  H01S5/3013

Abstract: A multi-chip module (MCM) includes: an interposer, a photonic chip, an optical gain chip, and a waveguide-fiber connector. The photonic chip, which may be electrically coupled to the interposer, may be implemented using a silicon-on-insulator (SOI) technology, and may include an optical waveguide that conveys an optical signal. Moreover, the optical gain chip, which may be electrically coupled to the interposer, may include a III-V compound semiconductor, and may include a second optical waveguide that conveys the optical signal and that is vertically aligned with the optical waveguide relative to a top surface of the interposer. Furthermore, the waveguide-fiber connector may be mechanically coupled to the interposer, and remateably mechanically coupled to an optical fiber coupler that includes the optical fiber. The waveguide-fiber connector may convey the optical signal between the optical waveguide in the photonic chip and the optical fiber.

公开(公告)号：US09673893B2

公开(公告)日：2017-06-06

申请号：US14815857

申请日：2015-07-31

Applicant: Oracle International Corporation

Inventor： Patrick J. Decker ,  Ashok V. Krishnamoorthy ,  Xuezhe Zheng ,  Ola Torudbakken

IPC: H04B10/00 ,  H04B10/03 ,  H04B10/50 ,  H04B10/564 ,  H04B10/40 ,  H04B10/80

CPC classification number: H04B10/03 ,  H04B10/40 ,  H04B10/503 ,  H04B10/564 ,  H04B10/801 ,  H04B2210/08

Abstract: When an unsafe port with a loss of signal is detected, a transceiver may enable one laser in a group of lasers associated with the unsafe port and may disable the remaining lasers. Then, the transceiver may instruct a transmitter associated with the one laser to transmit an optical signal on the unsafe port using a reduced transmit power that is less than a threshold value associated with the Class 1 conditions and at a different time than enabled lasers in other groups of lasers. Alternatively, for a safe port on which valid communication is received, the transceiver may enable lasers in a group of lasers associated with the safe port. Then, the transceiver may instruct transmitters associated with the lasers in this group of lasers to transmit optical signals on the safe port using a normal transmit power for the lasers that is greater than the threshold value.

公开(公告)号：US09653882B1

公开(公告)日：2017-05-16

申请号：US15019616

申请日：2016-02-09

Applicant: Oracle International Corporation

Inventor： Xuezhe Zheng ,  Daniel Y. Lee ,  Ashok V. Krishnamoorthy

IPC: H01S5/0687 ,  H01S5/10 ,  H01S5/14 ,  H01S3/106 ,  H01S3/10 ,  H01S5/30 ,  H01S5/026

CPC classification number: H01S5/0687 ,  H01S3/083 ,  H01S3/10053 ,  H01S3/106 ,  H01S5/142

Abstract: An optical source is described. This hybrid external cavity laser includes a semiconductor optical amplifier (with a semiconductor other than silicon) that provides an optical gain medium and that includes a reflector (such as a mirror). Moreover, the hybrid external cavity laser includes a photonic chip with: an optical waveguide that conveys an optical signal output by the semiconductor optical amplifier; and a ring resonator (as a wavelength-selective filter), having a resonance wavelength, which reflects at least a resonance wavelength in the optical signal. Furthermore, the photonic chip includes an interferometer that provides optical signals on arms of the interferometer. Control logic in the hybrid external cavity laser thermally tunes the resonance wavelength to match a cavity mode of the hybrid external cavity laser based on measurements of the optical signals from the interferometer.

公开(公告)号：US20170038609A1

公开(公告)日：2017-02-09

申请号：US14794457

申请日：2015-07-08

Applicant: ORACLE INTERNATIONAL CORPORATION

Inventor： Ying L. Luo ,  Shiyun Lin ,  Xuezhe Zheng ,  Ashok V. Krishnamoorthy

IPC: G02F1/025 ,  G02F1/01 ,  G02F1/225

CPC classification number: G02F1/025 ,  G02F1/0123 ,  G02F1/2255 ,  G02F2001/0151 ,  G02F2001/212 ,  G02F2202/32

Abstract: An optical modulator is described. This optical modulator may be implemented using silicon-on-insulator (SOI) technology. In particular, a semiconductor layer in an SOI platform may include a photonic crystal having a group velocity of light that is less than that of the semiconductor layer. Moreover, an optical modulator (such as a Mach-Zehnder interferometer) may be implemented in the photonic crystal with a vertical junction in the semiconductor layer. During operation of the optical modulator, an input optical signal may be split into two different optical signals that feed two optical waveguides, and then subsequently combined into an output optical signal. Furthermore, during operation, time-varying bias voltages may be applied across the vertical junction in the optical modulator using contacts defined along a lateral direction of the optical modulator.

Abstract translation: 描述了光调制器。 该光调制器可以使用绝缘体上硅（SOI）技术来实现。 特别地，SOI平台中的半导体层可以包括具有小于半导体层的光的组光速的光子晶体。 此外，可以在半导体层中具有垂直结的光子晶体中实现光调制器（诸如马赫 - 曾德干涉仪）。 在光调制器的操作期间，输入光信号可以被分成两个不同的光信号，其馈送两个光波导，然后被组合成输出光信号。 此外，在操作期间，可以使用沿着光学调制器的横向方向限定的触点在光调制器中的垂直结上施加时变偏置电压。

公开(公告)号：US09470914B1

公开(公告)日：2016-10-18

申请号：US14807664

申请日：2015-07-23

Applicant: Oracle International Corporation

Inventor： Stevan S. Djordjevic ,  John E. Cunningham ,  Ashok V. Krishnamoorthy

IPC: G02F1/335 ,  G02F1/025 ,  G02F1/225 ,  G02F1/015 ,  G02F1/21

CPC classification number: G02F1/025 ,  G02F1/2257 ,  G02F2001/0153 ,  G02F2001/0154 ,  G02F2001/212

Abstract: An electro-refraction modulator includes a series of layers with different doping levels surrounding a single-crystal regrown p-n junction implemented in a silicon-on-insulator (SOI) technology. The regrown p-n junction is spatially abrupt and precisely defined, which significantly increases the tuning efficiency of the electro-refraction modulator while maintaining acceptable insertion loss. Consequently, the electro-refraction modulator (such as a resonator modulator or a Mach-Zehnder interferometer modulator) can have high bandwidth, compact size and reduced drive voltage. The improved performance of the electro-refraction modulator may facilitate silicon-photonic links for use in applications such as wavelength-division multiplexing.

Abstract translation: 电折射调制器包括具有不同掺杂水平的一系列层，围绕在绝缘体上硅（SOI）技术中实现的单晶重新生长的p-n结。 再生长的p-n结在空间上突然和精确地限定，这显着提高了电折射调制器的调谐效率，同时保持可接受的插入损耗。 因此，电折射调制器（诸如谐振器调制器或马赫 - 曾德干涉仪调制器）可以具有高带宽，紧凑的尺寸和降低的驱动电压。 电折射调制器的改进的性能可以促进用于诸如波分复用的应用中的硅 - 光子链路。

公开(公告)号：US20160277098A1

公开(公告)日：2016-09-22

申请号：US14815857

申请日：2015-07-31

Applicant: Oracle International Corporation

Inventor： Patrick J. Decker ,  Ashok V. Krishnamoorthy ,  Xuezhe Zheng ,  Ola Torudbakken

IPC: H04B10/03 ,  H04B10/564 ,  H04B10/50

CPC classification number: H04B10/03 ,  H04B10/40 ,  H04B10/503 ,  H04B10/564 ,  H04B10/801 ,  H04B2210/08

Abstract: When an unsafe port with a loss of signal is detected, a transceiver may enable one laser in a group of lasers associated with the unsafe port and may disable the remaining lasers. Then, the transceiver may instruct a transmitter associated with the one laser to transmit an optical signal on the unsafe port using a reduced transmit power that is less than a threshold value associated with the Class 1 conditions and at a different time than enabled lasers in other groups of lasers. Alternatively, for a safe port on which valid communication is received, the transceiver may enable lasers in a group of lasers associated with the safe port. Then, the transceiver may instruct transmitters associated with the lasers in this group of lasers to transmit optical signals on the safe port using a normal transmit power for the lasers that is greater than the threshold value.

Abstract translation: 当检测到具有信号丢失的不安全端口时，收发器可以在与不安全端口相关联的一组激光器中启用一个激光器，并且可以禁用剩余的激光器。 然后，收发器可以指示与一个激光器相关联的发射器在不安全端口上使用小于与类别1条件相关联的阈值的衰减的发射功率以及在与其他激光器中的能量激光器不同的时间 激光组。 或者，对于在其上接收有效通信的安全端口，收发器可以使得与安全端口相关联的一组激光器中的激光器成为可能。 然后，收发器可以指示与这组激光器中的激光器相关联的发射器使用大于阈值的激光器的正常发射功率在安全端口上传输光信号。

公开(公告)号：US20160216445A1

公开(公告)日：2016-07-28

申请号：US14605650

申请日：2015-01-26

Applicant: Oracle International Corporation

Inventor： Hiren D. Thacker ,  Ashok V. Krishnamoorthy ,  Xuezhe Zheng ,  John E. Cunningham

IPC: G02B6/12 ,  H01L23/498 ,  H04B10/80 ,  G02B6/32 ,  G02B6/42 ,  H01L25/16 ,  G02B6/30

CPC classification number: G02B6/12004 ,  G02B6/30 ,  G02B6/32 ,  G02B6/4219 ,  G02B6/4257 ,  G02B6/4274 ,  G02B2006/12061 ,  G02B2006/12142 ,  H01L23/49827 ,  H01L23/49838 ,  H01L23/49894 ,  H01L25/167 ,  H01L2224/16225 ,  H01L2924/0002 ,  H01L2924/15311 ,  H04B10/803 ,  H01L2924/00

Abstract: A chip package includes an optical integrated circuit (such as a hybrid integrated circuit) and an integrated circuit that are proximate to each other in the chip package. The integrated circuit includes electrical circuits that modulate data, communicate data, and serialize/deserialize data, and the optical integrated circuit communicates optical signals with very high bandwidth. Moreover, a front surface of the integrated circuit is electrically coupled to a top surface of an interposer, and a top surface of the integrated circuit is electrically coupled to a front surface of the optical integrated circuit. Furthermore, a bottom surface of the optical integrated circuit faces the top surface of the interposer, and the front surface of the optical integrated circuit is optically coupled to an optical-fiber receptacle, which in turn is optically coupled to an optical-fiber connector.

Abstract translation: 芯片封装包括在芯片封装中彼此靠近的光学集成电路（例如混合集成电路）和集成电路。 该集成电路包括调制数据，传送数据和串行化/反序列化数据的电路，并且光学集成电路以非常高的带宽传送光信号。 此外，集成电路的前表面电耦合到插入件的顶表面，并且集成电路的顶表面电耦合到光学集成电路的前表面。 此外，光学集成电路的底表面面向插入件的顶表面，并且光学集成电路的前表面光学耦合到光纤插座，光纤插座又与光纤连接器光耦合。