Leaky surface-plasmon mode directional coupler and polarization detection module for magneto-optical pickup head using the same
US7899285B2 · kind B2 · utility
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3References
11Claims
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Key dates
| Filing date | Mar 4, 2004 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Dec 17, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/124
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.