Low-loss photonic crystal waveguide having large core radius

US6625364B2 · kind B2 · utility

Assignee

• OmniGuide Communications · US

Inventors

• Steven G. Johnson · McLeansboro, US
• Mihai Ibanescu · Cambridge, US
• Ori Weisberg · Cambridge, US
• Yoel Fink · Cambridge, US
• John D. Joannopoulos · Belmont, US
• Maksim Skorobogatiy · Watertown, US
• Torkel Engeness · Somerville, US
• Marin Soljacic · Belmont, US
• Steven A. Jacobs · Needham, US

Key dates

• Filing date: Jan 25, 2002
• Grant date: Sep 23, 2003
• Expiry date: Jan 25, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/29377
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical waveguide including: a dielectric core region extending along a waveguide axis; and a dielectric confinement region surrounding the core about the waveguide axis, the confinement region comprising a photonic crystal structure having a photonic band gap, wherein during operation the confinement region guides EM radiation in at least a first range of frequencies to propagate along the waveguide axis, wherein the core has an average refractive index smaller than about 1.3 for a frequency in the first range of frequencies, and wherein the core a diameter in a range between about 4 &lgr; and 80 &lgr;, wherein &lgr; is a wavelength corresponding to a central frequency in the first frequency range.