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Proceedings Paper

Single-mode fiber relay for the ESO laser guide star facility
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Paper Abstract

We report on efficient transportation of visible high power (> 5 W) continuous-wave laser radiation in polarization maintaining, medium-long (> 10 m) optical fibers with single-mode output. Solutions are presented to achieve both maximum launching efficiency of a free-space laser beam as well as efficient reduction of stimulated Brillouin back- scattering together with optimum excitation of mesospheric sodium atoms. The fiber throughput experiments carried out so far with shorter fibers agree well with the theoretical predictions. Single-mode transmission above 70% have been achieved in 5 m and 10 m long test fiber units at input powers of 4.2 W at 532 nm. We do not experience fiber glass damage nor changes in throughput over 200 hours operation, at power densities of 25 MW/cm2. An outlook is given on the final development steps required for successful implementation of a single-mode fiber relay system within ESO's laser guide star facility.

Paper Details

Date Published: 7 July 2000
PDF: 12 pages
Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390327
Show Author Affiliations
Wolfgang K. P. Hackenberg, European Southern Observatory (Germany)
Domenico Bonaccini, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 4007:
Adaptive Optical Systems Technology
Peter L. Wizinowich, Editor(s)

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