Electrooptic probe for vector measurement of an electromagnetic field
US8264685B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 15, 2007 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Apr 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring two components of an electromagnetic field in an analysis zone includes a light source for sending a polarized light beam into a polarization-maintaining optical fiber. The beam is directed along one axis of the fiber. An isotropic electrooptic material is placed in the zone for receiving the beam from the optical fiber via a substantially quarter-wave plate, which has its axes oriented at an angle of substantially 45° to the axes of the optical fiber and for sending a beam into the fiber. The plate is slightly detuned in regard to its characteristics or its orientation. The device further includes a phase-shifter for phase-shifting the beam sent into the fiber, wherein the phase-shifter is set so as to impose a phase shift equal and opposite to that imposed by the fiber and mechanism for analyzing the orientation and ellipticity of the wave exiting the phase-shifter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.