Cabling configurations for hollow core optical fibers

US11156768B2 · kind B2 · utility

Assignee

• CFS FITEL, LLC · US

Inventors

• David J. DiGiovanni · Mountain Lakes, US
• Daryl Inniss · Princeton, US
• Brian Mangan · Hopewell, US
• Vitaly Mikhailov · Dunellen, US
• John E Pacini · Glastonbury, US
• Tristan Kremp · Somerville, US

Key dates

• Filing date: May 18, 2020
• Grant date: Oct 26, 2021
• Expiry date: May 18, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/0012
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A hollow core optical fiber and cable combination is configured to exhibit minimal SNR and loss degradation. This is achieved by either: (1) reducing the coupling between the fundamental and other (unwanted) modes propagating within the hollow core fiber; or (2) increasing the propagation loss along the alternative. The first approach may be achieved by designing the cable to minimize perturbations and/or designing the hollow core fiber to fully separate the fundamental mode from the unwanted modes so as to reduce coupling into the unwanted modes. Whether through fiber design or cable design, the amount of light coupled into unwanted modes is reduced to acceptable levels. The second approach may be realized through either fiber design and/or cable design to suppress the light in unwanted modes so that an acceptably low level of light is coupled back into the fundamental mode.