Electro-optic modulator with compensation of thermally induced birefringence
US4094581A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1977 |
| Grant date | Jun 13, 1978 |
| Priority date | — |
| Expiry date | Jan 31, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0311
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optic modulator for phase modulating a high power beam of monochromatic electro-magnetic radiation is described where localized phase distortion occurring within the beam due to thermal heating is compensated. The received radiation is passed through two precisely matched electro-optic crystals and an optical compensating element located between the two crystals. One of the crystals has an applied field for modulation purposes. With this arrangement, the thermal birefringent effects induced in the crystals are cancelled out with the output beam polarization properties determined by the input polarization, optical compensating element and applied electric field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.