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:
Dec. 06, 2016
Filed:
May. 12, 2014
Phovel.co.ltd., Daejeon, KR;
Jeong-Soo Kim, Gongju-si, KR;
PHOVEL.CO.LTD., Daejeon, KR;
Abstract
A TO type laser device that can perform long-distance transmission due to a reduced line breadth of laser light. A semiconductor laser device which comprises a laser diode chip () that emits laser light; a wavelength-selective filter; a collimating lens () disposed in a light path between the laser diode chip () and the wavelength-selective filter and to collimate light emitted from the laser diode chip (); a 45°-partial reflective mirror () disposed in a light path between the laser diode chip () and the wavelength-selective filter for changing laser light traveling parallel to the bottom of a package into laser light traveling perpendicularly to the bottom of the package; and an optical wavelength supervisory photodiode () disposed in a light path along which laser light reflecting from the wavelength-selective filter, after being emitted from the laser diode chip (), passes through the 45°-partial reflective mirror ().