Wavelength division multiplexing (WDM) optical modules

US10120149B1 · kind B1 · utility

Assignee

• Hewlett Packard Enterprise Development LP · US

Inventors

• Sagi Varghese Mathai · Sunnyvale, US
• Wayne V. Sorin · Stanford, US
• Michael Renne Ty Tan · Menlo Park, US
• Paul Kessler Rosenberg · Sunnyvale, US

Key dates

• Filing date: Jul 13, 2017
• Grant date: Nov 6, 2018
• Expiry date: Jul 13, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J14/0215
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Examples herein relate to a Wavelength Division Multiplexing (WDM) optical module configured for M optical fibers, N WDM wavelengths and M×N optical signals. The module comprises an active silicon interposer, the interposer comprises a (M/2)×N array of photodetectors established on a front side of the interposer and N chips for the N WDM wavelengths. Each chip comprises M lenses for M optical signals, the M lenses established on a back side of a GaAs substrate, the M lenses comprising a first group of M/2 lenses to focus M/2 optical input signals onto M/2 photodetectors of the (M/2)×N array, and a second group of M/2 lenses to collimate M/2 optical output signals, and M/2 Vertical Cavity Surface Emitting Lasers (VCSELs) established on a front side of the GaAs substrate to generate the M/2 optical output signals.