Patents Assigned to ACACIA COMMUNICATIONS INC.
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Patent number: 11650477Abstract: Disclosed herein are methods, structures, apparatus and devices for the termination of unused waveguide ports in planar photonic integrated circuits with doped waveguides such that free-carrier absorption therein may advantageously absorb any undesired optical power resulting in a significant reduction of stray light and resulting reflections.Type: GrantFiled: December 21, 2016Date of Patent: May 16, 2023Assignee: ACACIA COMMUNICATIONS, INC.Inventor: Long Chen
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Patent number: 11621536Abstract: An apparatus and method for calculating the frequency of the light.Type: GrantFiled: November 9, 2020Date of Patent: April 4, 2023Assignee: Acacia Communications, Inc.Inventors: Long Chen, Christopher Doerr
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Patent number: 11621781Abstract: A method, system, and apparatus enabled to selectively choose a baud rate for communication of optical data using a modem enabled to operate with an optical signal modulated at plurality of finely tuned baud rates.Type: GrantFiled: June 24, 2021Date of Patent: April 4, 2023Assignee: Acacia Communications, Inc.Inventor: Jonas Geyer
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Patent number: 11606156Abstract: A method, system, and apparatus for determining delay between clocks, in response to a trigger event, buffering DSP symbol information in a symbol capture buffer; wherein the amount of DSP symbol information buffered corresponds to the amount of symbols captured during a buffer storage interval; and extracting a synchronization packet from the symbol capture buffer.Type: GrantFiled: April 24, 2020Date of Patent: March 14, 2023Assignee: Acacia Communications, Inc.Inventors: James Duda, Jon Stahl, Kevin Hinchey
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Patent number: 11599140Abstract: In a first and second embodiment, an apparatus and system comprising a set of voltage controlled oscillators (VCOs); wherein each VCO of the set of VCOs has an LC tank; wherein each VCO of the set of VCOs is connected via a transmission line. In a third embodiment, a method comprising connecting each VCO in a set of VCOs by connecting each respective LC tank of each VCO of the set of VCOs with a transmission line.Type: GrantFiled: September 30, 2019Date of Patent: March 7, 2023Assignee: Acacia Communications, Inc.Inventors: Ian Dedic, David Enright, Tarun Gupta
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Publication number: 20230056068Abstract: In part, the disclosure relates to system. The system includes a polarization diversified wavelength demultiplexer (WDM). The polarization diversified wavelength demultiplexer includes a polarization beam splitter configured to output a first polarized signal and a second polarized signal based on an input signal; and a wavelength demultiplexer (WDM) having two inputs that are connected to the two outputs of the polarization beam splitter, and configured to output signals with a single set of outputs that carry signals of both polarizations, based on the first polarized signal from the first input and the second polarized signal from the second input.Type: ApplicationFiled: August 20, 2021Publication date: February 23, 2023Applicant: Acacia Communications, Inc.Inventor: Long Chen
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Publication number: 20230040120Abstract: Techniques for performing forward error correction of data to be transmitted over an optical communications channel. The techniques include: receiving data bits; organizing the data bits into an arrangement having a plurality of blocks organized into rows and columns and into a plurality of strands including a first strand of blocks that includes a back portion comprising a first row of the plurality of blocks, and a front portion comprising blocks from at least two different columns in at least two different rows other than the first row of blocks; and encoding at least some of the data bits in the arrangement using a first error correcting code at least in part by generating first parity bits by applying the first error correcting code to first data bits in the front portion of the first strands and second data bits in the back portion of the first strand.Type: ApplicationFiled: October 24, 2022Publication date: February 9, 2023Applicant: Acacia Communications, Inc.Inventor: Pierre Humblet
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Patent number: 11563428Abstract: A method and apparatus for determining a set of cascading clock cycles, the method comprising inputting a set of phase changes of a set of clocks into a set of input circuits; wherein the set of phase changes are either falling phase changes or rising phase changes; wherein two phase changes of the set of clocks are fed into each input circuit of the set of input circuits, determining for each input circuit of the set of input circuits a duty cycle, storing the duty cycle for each input circuit of the input circuits in a set of duty cycles, calculating skew between the set of clocks using the duty cycles, and adjusting a delay to lower the skew between the set of clocks.Type: GrantFiled: June 22, 2020Date of Patent: January 24, 2023Assignee: Acacia Communications, Inc.Inventors: Ramesh K. Singh, Tarun Gupta, Guojun Ren, Richard Castell
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Patent number: 11563136Abstract: In part, in one aspect, the disclosure relates to a system including a photonic integrated circuit (PIC) assembly, comprising a PIC comprising: a first bond pad disposed inward from an edge of the PIC a first distance; and a first wire having a first length, the first wire electrically connected to the first bond pad and extending therefrom, wherein the first distance is greater than 0.4 mm.Type: GrantFiled: July 15, 2020Date of Patent: January 24, 2023Assignee: ACACIA COMMUNICATIONS, INC.Inventor: John Heanue
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Patent number: 11556020Abstract: Integrated wavelength selectors are described. The wavelength selector may include silicon nitride ring resonator disposed vertically between a heater and a temperature sensor. The temperature sensor may be formed of silicon in some embodiments. The wavelength selector may be coupled to the output port of a tunable laser, or may be disposed within a laser cavity.Type: GrantFiled: July 29, 2020Date of Patent: January 17, 2023Assignee: ACACIA COMMUNICATIONS, INC.Inventor: Long Chen
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Patent number: 11552710Abstract: Aspects of the present disclosure are directed to a photonic integrated circuit (PIC) having a resistivity-engineered substrate to suppress radio-frequency (RF) common-mode signals. In some embodiments, a semiconductor substrate is provided that comprises two portions having different levels of resistivity to provide both suppression of common mode signals, and reduction of RF absorption loss for non-common mode RF signals. In such embodiments, a bottom portion of the semiconductor substrate has a low resistivity to suppress common mode via RF absorption, while a top portion of the semiconductor substrate that is adjacent to conductors in the IC has a high resistivity to reduce RF loss.Type: GrantFiled: August 17, 2020Date of Patent: January 10, 2023Assignee: ACACIA COMMUNICATIONS, INC.Inventors: Long Chen, Leonard Jan-Peter Ketelsen
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Patent number: 11543850Abstract: An apparatus and system for a clock buffer. The clock buffer comprises a source follower, and the source follower comprises a voltage source and a resistor.Type: GrantFiled: January 31, 2020Date of Patent: January 3, 2023Assignee: Acacia Communications, Inc.Inventors: Ian Dedic, Gavin Allen, David Enright, Bo Yang, Tarun Gupta
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Patent number: 11483879Abstract: Techniques for performing forward error correction of data to be transmitted over an optical communications channel. The techniques include: receiving data bits; organizing the data bits into an arrangement having a plurality of blocks organized into rows and columns and into a plurality of strands including a first strand of blocks that includes a back portion comprising a first row of the plurality of blocks, and a front portion comprising blocks from at least two different columns in at least two different rows other than the first row of blocks; and encoding at least some of the data bits in the arrangement using a first error correcting code at least in part by generating first parity bits by applying the first error correcting code to first data bits in the front portion of the first strands and second data bits in the back portion of the first strand.Type: GrantFiled: October 5, 2020Date of Patent: October 25, 2022Assignee: Acacia Communications, Inc.Inventor: Pierre Humblet
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Publication number: 20220308296Abstract: An integrated wavelength division multiplexer is described. The integrated wavelength division multiplexer may include a first waveguide core defining a first propagation axis and configured to guide light of a first wavelength and light of a second wavelength, and a second waveguide core defining a second propagation axis and configured to guide the light of the second wavelength. A first portion of the second propagation axis for which the first waveguide core and second waveguide core may be overlapping is oriented at a non-zero angle relative to the first propagation axis. The first waveguide core and second waveguide core may be configured relative to each other to adiabatically couple the light of the second wavelength between the first and second waveguide cores.Type: ApplicationFiled: June 6, 2022Publication date: September 29, 2022Applicant: Acacia Communications, Inc.Inventors: Long Chen, Christopher Doerr, Li Chen
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Patent number: 11448823Abstract: A method and apparatus for scanning a scene.Type: GrantFiled: August 17, 2018Date of Patent: September 20, 2022Assignee: Acacia Communications, Inc.Inventor: Christopher Doerr
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Patent number: 11432056Abstract: An apparatus and system, including a switch; and a set of tiles; wherein each of the set of tiles include a PIC die, a DSP die, a driver die, and a TIA die and methods thereto.Type: GrantFiled: July 24, 2020Date of Patent: August 30, 2022Assignee: Acacia Communications, Inc.Inventors: Christopher Doerr, Benny Mikkelsen, Ian Dedic, John LoMedico, Song Jiang
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Patent number: 11418313Abstract: A system, method, and apparatus enabling synchronous and asynchronous data sources to be demapped from an oFrame container using a generic mapping system.Type: GrantFiled: February 25, 2021Date of Patent: August 16, 2022Assignee: Acacia Communications, Inc.Inventors: Michael Sluyski, Pierre Humblet, James Duda
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Patent number: 11409035Abstract: An optical coherent transceiver comprising a polarization and phase-diversity coherent receiver and a polarization and phase-diversity modulator on the same substrate interfaced by three grating couplers, one grating coupler coupling in a signal, one grating coupler coupling in a laser signal, and a third grating coupler coupling out a modulated signal.Type: GrantFiled: September 21, 2020Date of Patent: August 9, 2022Assignee: Acacia Communications, Inc.Inventors: Christopher Doerr, Benny Mikkelsen, Eric Swanson
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Patent number: 11411371Abstract: In a first embodiment, an external cavity tunable laser, comprising a silicon photonics circuit comprising one or more resonators having one or more p-i-n junctions; wherein a voltage is applied to one or more of the p-i-n junctions. In a second embodiment, a method of operating an external cavity tunable laser, comprising sweeping out free-carriers from a resonator of the tunable laser by applying a voltage to a p-i-n junction of a waveguide of the resonator.Type: GrantFiled: July 13, 2020Date of Patent: August 9, 2022Assignee: Acacia Communications, Inc.Inventors: Christopher Doerr, Li Chen, Long Chen
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Patent number: 11409059Abstract: Structures and methods for passively aligning a photonic die with a receiving substrate are described. Three alignment surfaces, having dimensions greater than a desired alignment accuracy, may be formed on the photonic die and used to passively and accurately align the photonic die to a receiving substrate in six degrees of freedom. Two of the three alignment surfaces on the photonic die may be formed in a single mask-and-etch process, while the third alignment surface may require no patterning or etching. Three complementary alignment surfaces on the receiving substrate may be formed in a single mask-and-etch process.Type: GrantFiled: October 26, 2020Date of Patent: August 9, 2022Assignee: Acacia Communications, Inc.Inventors: Diedrik Vermeulen, Christopher Doerr