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:
Nov. 26, 2013
Filed:
Dec. 17, 2009
Byung-seok Choi, Daejeon, KR;
Dae Kon OH, Daejeon, KR;
O-kyun Kwon, Daejeon, KR;
Dong Churl Kim, Daejeon, KR;
Kisoo Kim, Daejeon, KR;
Hyun Soo Kim, Daejeon, KR;
Byung-Seok Choi, Daejeon, KR;
Dae Kon Oh, Daejeon, KR;
O-Kyun Kwon, Daejeon, KR;
Dong Churl Kim, Daejeon, KR;
Kisoo Kim, Daejeon, KR;
Hyun Soo Kim, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
An optical amplifier includes a passive waveguide region and an active waveguide region. The passive waveguide region is configured to receive an incident optical signal and adjust a mode of the optical signal. The active waveguide region is integrated to the passive waveguide region and configured to perform gain modulation on the optical signal received from the passive waveguide region by changing density of carriers in response to a current applied to the active waveguide region. Internal loss of the active waveguide region is adjusted to produce a resonance effect and thereby to increase bandwidth of the active waveguide. Therefore, the optical amplifier can have a wide bandwidth under a low-current condition.