Optical control element
US7123804B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 23, 2004 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Nov 23, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y20/00
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
An optical control element is disclosed that can be made small and has a low loss, and is able to provide group speed control and wavelength dispersion of short light pulses. The optical control element is formed from a photonic crystal, and includes a first portion having a first refraction index in the photonic crystal, a second portion having a second refraction index lower than the first refraction index, and a refraction-index-distributed type defect wave guide. A difference effective refraction indexes between the first portion and the second portion near the refraction-index-distributed type defect wave guide, changing continuously or stepwise along a wave guiding direction of the refraction-index-distributed type defect wave guide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.