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Proceedings Paper

Resonant electro-optical modulator for high laser-power single-mode fiber relay
Author(s): W. Hackenberg; M. Zaehringer; A. Silber
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Paper Abstract

We describe the design and performance of a resonant electro-optical modulator, based on stoichiometric lithium tantalate, capable of handling high optical powers and providing a large modulation depth. This phase modulator is part of the single-mode fiber relay used in the ESO VLT Laser Guide Star Facility for adaptive optics to transport 589-nm laser light from the PARSEC dye laser installed in the laser clean room to the laser launch telescope. The purpose of the phase modulator is to broaden the single-frequency PARSEC laser linewidth before the laser light is injected into the single-mode relay fiber. By this the power handling capability of the single-mode fiber is increased by a factor of 3 or 10 W of in-coupled power at 589 nm, while maintaining the excitation efficiency of the mesospheric sodium D2 transition.

Paper Details

Date Published: 27 June 2006
PDF: 8 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 62724D (27 June 2006); doi: 10.1117/12.673190
Show Author Affiliations
W. Hackenberg, European Southern Observatory (Germany)
M. Zaehringer, Kayser-Threde GmbH (Germany)
A. Silber, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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