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Proceedings Paper

Electrooptic Gigahertz CO[sub]2[/sub] Laser Modulator
Author(s): Thomas Petsch
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Paper Abstract

A space-qualifiable broadband electrooptic phase modulator for CO2 laser intersatellite communication (wavelength 10.6 µm) was developed under ESA-contract. Eight Cadmium-Telluride crystals measuring 30 x 0.6 x 0.6 mm3 each were cascaded to yield a total active length of 240 mm. These crystals were embedded in a beryllia structure, designed to combine good heat transfer, high mechanical accuracy, and excellent electrical properties. Measured modulator characteristics are: optical transmittance > 80%, electrical bandwidth 2 GHz, maximum VSWR 1.75:1, modulation efficiency (at 20 W RF drive power) 1/8, modulation frequency response ±1 dB up to 1 GHz.

Paper Details

Date Published: 6 October 1989
PDF: 8 pages
Proc. SPIE 1131, Optical Space Communication, (6 October 1989); doi: 10.1117/12.961544
Show Author Affiliations
Thomas Petsch, Schrack Aerospace (Austria)

Published in SPIE Proceedings Vol. 1131:
Optical Space Communication

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