Intel Corporation

Amazon Technologies, Inc.

Aliasghar Eftekhar

Meer Nazmus Sakib

Haisheng Rong

Omid Momtahan

Alaa Adel Mahdi Hayder

Hao Li

Poorya Saghari

Duanni Huang

Saeed Fathololoumi

John Heck

Ansheng Liu

Ganesh Balamurugan

Ling Liao

Olufemi I Dosunmu

David Hui

Harel Frish

Jonathan Doylend

Reece DeFrees

Mengyuan Huang

Taehwan Kim

Venkata Satish Kumar Vangala

Lingtao Liu

Chaoxuan Ma

Peicheng Liao

Srinivasan Sethuraman

Gregory Lovell

Eddie Bononcini

Stanley J Dobek

Walter Garay

Mohammad Montazeri Najafabadi

A method may include: forming a base layer on a substrate; forming a waveguide assembly on the base layer, where the waveguide assembly is surrounded by a cladding layer; forming a trench opening through the cladding layer and the base layer; forming an undercut void by etching the substrate through the trench opening, where the undercut void extends under the waveguide assembly and the base layer; and filling the trench opening with a filler to seal off the undercut void. Other embodiments are described and claimed.

Heating of thermo-optic device

Embodiments described herein may be related to apparatuses, processes, and techniques related to fully integrated optical coherent modulators on a silicon chip. These coherent modulators may be used to enable transmitters, receivers, transceivers, tunable lasers and other optical or electro-optical devices to be integrated on a silicon chip. In embodiments, the optical coherent modulators may be based on differential microring modulators that may be nested in a Mach-Zehnder Interferometer (MZI) configuration. Embodiments may also be directed to a miniaturized and fully integrated coherent modulators, which can enable terabit per second (Tbps) transceivers in a small form factor based on coherent modulation on a silicon chip. Other embodiments may be described and/or claimed.

Optical coherent transmitter on a silicon chip

A balanced photodetector may include: a balanced photodetector including a first photodiode and a second photodiode coupled with one another at a common node, wherein the first photodiode has a first effective responsivity and the second photodiode has as second effective responsivity; and a control circuit configured to set an operating parameter of the balanced photodetector to compensate for a difference between the first effective responsivity and the second effective responsivity.

Balanced photodetector and methods thereof

In one embodiment, an apparatus includes a substrate, an oxide layer on the substrate, a silicon layer on the oxide layer, which includes a waveguide region and etched regions adjacent to the waveguide region, a germanium layer on the silicon layer and adjacent the waveguide region of the silicon layer, and a resistive element adjacent to the germanium layer to provide heat to the germanium layer in response to a current applied to the resistive element.

Germanium waveguide photodetector with integrated heater

The present disclosure is directed to photonic wavelength division multiplexing (WDM) receivers with polarization diversity and/or low reflectance. In embodiments, a WDM receiver is provided with a splitter, a plurality of waveguides and a plurality of photodetectors in series. The waveguides having particular equal path lengths relationship from the splitter to respective ones of the photodetectors. In other embodiments, the WDM receiver is provided with a splitter, a looped waveguide, a plurality of photodetectors, and a plurality of variable optical attenuators (VOAs). The VOAs are configured to suppress reflection of signal beams back to the transmitter. In various embodiments, the WDM receiver is a receiver sub-assembly of a silicon photonic transceiver disposed in a silicon package. Other embodiments may be described and/or claimed.

Photonic wavelength division multiplexing (WDM) receiver with polarization diversity and/or low reflectance

An optical communication system comprises a plurality of linked single-wavelength coherent optical transceivers configured to communicate via short-reach data-center links at a common reference wavelength, each transceiver including a single single-wavelength laser source that is used to produce a source beam at a source beam wavelength, the source beam being used to produce transmit beams sent by the transceiver and for mixing with one or more receive beams received by the transceiver; wherein each of the transceivers includes a thermo-electric cooler configured to control a temperature of the single-wavelength laser source around a temperature setpoint that locks the source beam wavelength to the common reference wavelength; wherein each transceiver includes a wavelength deviation detector configured to detect a wavelength deviation between the source beam wavelength and the wavelength or wavelengths of the one or more receive beams or between the source beam wavelength and the common reference wavelength, wherein the wavelength deviation detector is configured to detect a threshold amount of wavelength deviation that is indicative that the single-wavelength laser source is problematic or a single-wavelength laser source of a separate transceiver coupled to send the one or more receive beams is problematic, wherein each transceiver is configured to indicate the wavelength deviation or problematic characteristic in order to identify problematic laser sources and thereby prevent the linked network of transceivers from communicating at a linked network wavelength that is marginal or out-of-range in relation to the common reference wavelength.

Laser-shared coherent transceivers and methods

An optical transceiver includes a built-in optical switch to switch between diverse fiber paths in switches in a datacenter or in switches between two datacenters. The built-in optical switch can be used to switch between racks in a datacenter to increase capacity for any rack that requests it. A controller, which receives a signal from a server computer in one of the racks, can be external to the optical transceiver or within the optical transceiver. In either case, the server computer can be provided with additional bandwidth when needed. For connections between datacenters, the built-in optical switch allows for optical line protection, but without the need for a splitter circuit, which incurs a significant power loss and requires a more expensive transceiver. Consequently, the built-in optical switch within an optical transceiver can be used in a variety of contexts to increase efficiency and reduce overall costs for network devices.

Optical transceiver

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Fremont, CA, United States of America

Aliasghar Eftekhar