Compact and low loss Y-junction for submicron silicon waveguide

US9851503B2 · kind B2 · utility

Assignee

• Elenion Technologies, LLC · US

Inventors

• Yang Liu · Tangxia, CN
• Yangjin Ma · Brooklyn, US
• Ruizhi Shi · New York, US
• Michael J. Hochberg · New York, US
• Yi Zhang · Pasadena, US
• Shuyu Yang · Jersey City, US
• Thomas Wetteland Baehr-Jones · Arcadia, US

Key dates

• Filing date: Mar 1, 2017
• Grant date: Dec 26, 2017
• Expiry date: Mar 1, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/1215
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A compact, low-loss and wavelength insensitive Y-junction for submicron silicon waveguides. The design was performed using FDTD and particle swarm optimization (PSO). The device was fabricated in a 248 nm CMOS line. Measured average insertion loss is 0.28±0.02 dB across an 8-inch wafer. The device footprint is less than 1.2 μm×2 μm, orders of magnitude smaller than MMI and directional couplers.