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

US12222552B2 · kind B2 · utility

Assignee

• Intel Corporation · US

Inventors

• Duanni Huang · Goleta, US
• Saeed Fathololoumi · San Gabriel, US
• Meer Nazmus Sakib · Montréal, CA
• Mohammad Montazeri Najafabadi · San Lorenzo, US
• Chaoxuan Ma · Sunnyvale, US
• David Chak Wang Hui · Santa Clara, US
• Taehwan Kim · Seojong-myeon, KR
• Ling Liao · Santa Clara, US
• Hao Li · Poing, DE
• Ganesh Balamurugan · Hillsboro, US
• Haisheng Rong · Pleasanton, US
• Aliasghar Eftekhar · Fremont, US

Key dates

• Filing date: Dec 23, 2020
• Grant date: Feb 11, 2025
• Expiry date: Apr 20, 2043

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J14/06
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

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.