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:
Oct. 11, 2016
Filed:
Mar. 25, 2014
Phovel.co.ltd., Daejeon, KR;
Jeong-Soo Kim, Gongju-si, KR;
PHOVEL. CO. LTD., Yuseong-gu, Daejeon, KR;
Abstract
The present invention relates to a compact tunable laser device that can change the oscillation laser wavelength. The laser device includes: a laser diode chipthat emits laser light; an optical feedback-partial reflective mirrorthat feeds some of light emitted from the laser diode chipback to the laser diode chipby reflecting it; a collimating lensthat is disposed in a light path between the laser diode chipand the optical feedback-partial reflective mirrorand collimates light emitted from the laser diode chip; a tunable-selective filterof which the transmissive wavelength changes in accordance with temperature; and a 45°-reflective mirrorthat changes laser light traveling horizontally to a package bottom into laser light traveling perpendicular to the package bottom, wherein the laser diode chipor the tunable-selective filteris disposed on a thermoelectric elementand has an oscillation wavelength changing in accordance with a change in temperature of the thermoelectric element