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:
Jan. 29, 2008
Filed:
Dec. 22, 2004
Young Ho Kim, Daejeon-shi, KR;
Eun Soo Nam, Daejeon-shi, KR;
Kyoung Ik Cho, Daejeon-shi, KR;
BO Woo Kim, Daejeon-shi, KR;
Myung Sook OH, Daejeon-shi, KR;
Young Ho Kim, Daejeon-shi, KR;
Eun Soo Nam, Daejeon-shi, KR;
Kyoung Ik Cho, Daejeon-shi, KR;
Bo Woo Kim, Daejeon-shi, KR;
Myung Sook Oh, Daejeon-shi, KR;
Electronics and Telecommunications Research Institute, Daejeon-shi, KR;
Abstract
Provided is a millimeter-wave band frequency optical oscillator that can be used as an oscillation frequency signal source for a millimeter-wave forwarded to wireless subscribers from a base station of a millimeter-wave wireless subscriber communication system for a next generation (e.g., fifth generation) ultra-high speed wireless internet service. A pair of an optical fiber amplifier and an optical fiber grating mirror is connected to each of input/output ports of a loop mirror in parallel, so that a dual mode laser resonator is formed which can make simultaneous oscillation in two laser modes suitable for each wavelength. Accordingly, it is possible to obtain a light source that is modulated to a ultra-high frequency (over 60 GHz) by a beat phenomenon between the two laser modes.