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:
Aug. 25, 2009
Filed:
Dec. 05, 2006
Jie Hyun Lee, Daejeon, KR;
Mahn Yong Park, Daejeon, KR;
Geon Jeong, Gwangju, KR;
Chul Young Kim, Gwangju, KR;
Seung Hyun Cho, Daejeon, KR;
Woo Ram Lee, Daejeon, KR;
Byoung Whi Kim, Daejeon, KR;
Jie Hyun Lee, Daejeon, KR;
Mahn Yong Park, Daejeon, KR;
Geon Jeong, Gwangju, KR;
Chul Young Kim, Gwangju, KR;
Seung Hyun Cho, Daejeon, KR;
Woo Ram Lee, Daejeon, KR;
Byoung Whi Kim, Daejeon, KR;
Abstract
Provided is an athermal external cavity laser (ECL), whose output optical power and output wavelength can be kept regular irrespective of temperature changes without using additional temperature controlling components. The ECL comprises: a semiconductor amplifier; an optical fiber comprising a core in which a Bragg grating is formed and a cladding surrounding the core; and a thermosetting polymer that fixes the optical fiber to a ferrule and has a negative thermooptical coefficient, wherein the thickness of the cladding surrounding the core in which the Bragg grating is formed is smaller than the portion of the cladding surrounding the portion of the core where the Bragg grating is not formed, and the thermosetting polymer the negative thermooptical coefficient surrounds the cladding. The ECL does not need additional temperature controlling components and thus can be manufactured compact and at low cost, and thus can be used as a light source of a dense wavelength division multiplexing (DWDM) system in designing economical WDM passive optical networks (PON).