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:
Jul. 13, 2010
Filed:
Feb. 02, 2005
Hiroyuki Tsuda, Yokohama, JP;
Hiroyuki Tsuda, Yokohama, JP;
Keio University, Tokyo, JP;
Abstract
An optical functional waveguide having a small size, used with stored energy, controlling the phase of light at high speed, and adjusting the optical path length. The optical functional waveguide includes a substrate (), a quartz waveguide clad (), a quartz waveguide core (), groove structures (), a filling material (), and heater electrode (). The filling material () placed in the groove structures () is, e.g., a resin transparent to the wavelength region of the guided light, and the refractive index temperature coefficient is about 10 to 100 times that of quartz. The heater electrode () is interposed between the groove structures () provided along the optical path. Therefore, the temperature of the filling material () can be varied sharply and quickly with little energy expended.