公开(公告)号：US12184399B1

公开(公告)日：2024-12-31

申请号：US17957063

申请日：2022-09-30

Applicant: Amazon Technologies, Inc.

Inventor： Omid Momtahan ,  Aliasghar Eftekhar ,  Alaa Adel Mahdi Hayder ,  Poorya Saghari

IPC: H04J14/02 ,  H04J14/00

Abstract: 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.

公开(公告)号：US11967994B1

公开(公告)日：2024-04-23

申请号：US17490973

申请日：2021-09-30

Applicant: Amazon Technologies, Inc.

Inventor： Poorya Saghari ,  Alaa Adel Mahdi Hayder ,  Omid Momtahan ,  Venkata Satish Kumar Vangala ,  Aliasghar Eftekhar

IPC: H04B10/03 ,  H04B10/079 ,  H04B10/25 ,  H04B10/40 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04B10/40 ,  H04B10/0793 ,  H04B10/25 ,  H04J14/0227 ,  H04Q11/0005 ,  H04Q11/0067 ,  H04Q2011/0039

Abstract: 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.