A practical optical modulator and link for antennas
Open Access
- 1 April 1985
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Journal of Lightwave Technology
- Vol. 3 (2) , 316-321
- https://doi.org/10.1109/jlt.1985.1074173
Abstract
This paper describes a practical application of a technique for coupling an antenna to a receiver using a passive fiber-optic link. This technique should avoid pickup and electromagnetic perturbations normally associated with the use of electrically conductive cables. Laser light (632.8 nm) is modulated at the antenna by an electrooptic lithium-tantalate crystal and is then transmitted with a fiber-optic cable to the receiver electronics. Using an avalanche photodiode, the amplitude modulated optical signal is converted to an electrical signal. The crystal is mounted directly on an antenna without amplifiers or other electrically powered components. Using a broad-band antenna with fields generated in an anechoic chamber and a standard TEM cell, the frequency response as measured dropped 3 dB per 1.0 GHz from 100 MHz to at least 2.0 GHz, with a signal-to-noise ratio of 5 dB with a 1.0-V/m field and a 1.0-kHz bandwidth. A dynamic range of at least 60 dB is shown.Keywords
This publication has 9 references indexed in Scilit:
- The characteristics of a relatively short broadband linear antenna with tapered resistive loadingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- High Frequency Response of a Single Mode Fiber Optical Phase Modulator Utilizing a Piezoelectric Plastic JacketPublished by SPIE-Intl Soc Optical Eng ,1983
- Electromagnetic Sensor Using Integrated Optic Channel Waveguide Modulator And Polarization Preserving FibersPublished by SPIE-Intl Soc Optical Eng ,1983
- Linear interferometric waveguide modulator for electromagnetic-field detectionOptics Letters, 1980
- An Optically Linked Telemetry System for Use with Electromagnetic-Field Measurement ProbesIEEE Transactions on Electromagnetic Compatibility, 1978
- A relatively short cylindrical broadband antenna with tapered resistive loading for picosecond pulse measurementsIEEE Transactions on Antennas and Propagation, 1978
- Sensitive isotropic antenna with fiber-optic link to a conventional receiverPublished by National Institute of Standards and Technology (NIST) ,1976
- Modulators for optical communicationsProceedings of the IEEE, 1970
- ELECTROOPTIC COEFFICIENTS AND ELASTIC-WAVE PROPAGATION IN SINGLE-DOMAIN FERROELECTRIC LITHIUM TANTALATEApplied Physics Letters, 1966