The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2022
Filed:
Oct. 31, 2018
Corning Research & Development Corporation, Corning, NY (US);
Alan Frank Evans, Beaver Dams, NY (US);
Davide Domenico Fortusini, Painted Post, NY (US);
Ming-Jun Li, Horseheads, NY (US);
Aramais Robert Zakharian, Painted Post, NY (US);
Corning Research & Development Corporation, Corning, NY (US);
Abstract
The methods disclosed herein include forming an expanded core in an optical fiber with a glass core having a core dopant and a core outer surface, and a glass cladding immediately surrounding the core and having a flat glass-portion surface closest to the core outer surface at a first core spacing S. The methods include applying heat to a section of the optical fiber to cause the glass core to expand toward the flat glass-portion surface due to thermal diffusion of the core dopant. The methods also include terminating the application of heat to define the expanded core in the heated section of the optical fiber. The expanded core defines an evanescent coupling region having a second core spacing 0≤S<Sand an adiabatic transition region between the core and the evanescent coupling region of the expanded core.