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:
Mar. 01, 2011
Filed:
Mar. 04, 2004
Yongwoo Park, Daejeon, KR;
Hyeon Bong Pyo, Daejeon, KR;
Dong Woo Suh, Daejeon, KR;
Yeungjoon Sohn, Daejeon, KR;
Hojun Ryu, Seoul, KR;
Mun Cheol Paek, Daejeon, KR;
Yongwoo Park, Daejeon, KR;
Hyeon Bong Pyo, Daejeon, KR;
Dong Woo Suh, Daejeon, KR;
Yeungjoon Sohn, Daejeon, KR;
Hojun Ryu, Seoul, KR;
Mun Cheol Paek, Daejeon, KR;
Abstract
A leaky plasmon mode directional coupler and a polarization detection module for a magneto-optical pickup head, which uses the leaky plasmon mode directional coupler, are provided. The leaky plasmon mode directional coupler is manufactured by integrating a planar waveguide and a leaky plasmon mode waveguide, which share a cladding layer with each other, into one body. The polarization detection module includes the leaky plasmon mode directional coupler, a first photo diode, which is formed on the leaky plasmon mode directional coupler, and a second photo diode, which is located at an output port of the planar waveguide.