Photodiode (PD) array with integrated back-side lenses and a multi-channel transceiver module implementing same

US10950651B2 · kind B2 · utility

Assignee

• Applied Optoelectronics, Inc. · US

Inventors

• Hsiu-Che Wang · Rosenberg, US
• Elsie Marentes · Katy, US
• Qin Li · Houston, US

Key dates

• Filing date: Nov 28, 2018
• Grant date: Mar 16, 2021
• Expiry date: Nov 28, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/4292
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The present disclosure is generally directed to an optical transceiver that includes a multi-channel on-board ROSA arrangement that includes an optical demultiplexer, e.g., an arrayed waveguide grating (AWG) and an array of photodiodes disposed on a same substrate. The array of photodiodes may be optically aligned with an output port of the optical demultiplexer and be configured to detect channel wavelengths and output a proportional electrical signal to an amplification circuit, e.g., a transimpedance amplifier. Each of the photodiodes can include an integrated lens configured to increase the alignment tolerance between the demultiplexer and the light sensitive region such that relatively imprecise bonding techniques, e.g., die bonding, may be utilized while still maintaining nominal optical power.