Optical modulator depressing optical feedback and optical modulating element and channel optical waveguide used therefore
US5351320A · kind A · utility
2Cited by
4References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 24, 1993 |
| Grant date | Sep 27, 1994 |
| Priority date | — |
| Expiry date | Jun 24, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y20/00
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
An optical modulating element has a core layer and first and second cladding layers sandwiching the core layer. The core layer is made of one or semiconductors belonging to a point group 43m or 42m, and has TM.sub.00 and TE.sub.00 propagation modes. The direction of light of said TM.sub.00 and TE.sub.00 propagation modes is parallel to the [110] or [-110] direction of crystal orientation. The change amount of an index of refraction of the core layer caused by the application of an electric field to the core layer in the direction parallel to the [001] direction is different for the two propagation modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.