Broad-band substrate-wave-coupled electro-optic modulator
US5309531A · kind A · utility
9Cited by
5References
21Claims
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Key dates
| Filing date | Nov 12, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Nov 12, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0356
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optic modulator in which the input electromagnetic signal is launched as a substrate mode in the electro-optic material. Broadband endfire antennas on the top surface of the substrate couple the signal to electrodes positioned above the optical waveguide in the substrate to concentrate the input signal and achieve high electric field strength in the vicinity of the optical waveguide. The endfire antennas are oriented with respect to the optical waveguides so as to compensate for the phase velocity mismatch between the electromagnetic signal and the light beam in the optical waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.