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:
May. 13, 2003
Filed:
Mar. 07, 2001
Shizhuo Yin, State College, PA (US);
Paul Kurtz, State College, PA (US);
Karl Reichard, State College, PA (US);
Hongyu Liu, State College, PA (US);
Qiming Zhang, State College, PA (US);
The Penn State Research Foundation, University Park, PA (US);
Abstract
An optical filter that is tunable over a wide portion of the spectrum, such as the infrared portion. The filter has a core of silica fiber with a first cladding layer of silica fiber disposed thereon. A long period grating is disposed on the core. A second electro-optical cladding layer is disposed on the first cladding layer. The first cladding layer is ultra thin so as to support only a single resonant band over the spectral portion. The resonant band is tunable to different wavelengths in the spectral portion by a voltage applied to the second electro-optic layer. The electro-optic layer is a copolymer that has a refractive index less than that of the silica fiber material. The optical filter has fast tuning speed (nanosecond range), wide tuning range (>50 nm), low insertion loss (<0.1 dB), narrow bandwidth (<0.5 nm), and low sidelobe (<30 dB).