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

Wolfgang K. P. Hackenberg; Domenico Bonaccini

doi:10.1117/12.390327

7 July 2000 Single-mode fiber relay for the ESO laser guide star facility

Wolfgang K. P. Hackenberg, Domenico Bonaccini

Proceedings Volume 4007, Adaptive Optical Systems Technology; (2000) https://doi.org/10.1117/12.390327
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

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.

Citation Download Citation

Wolfgang K. P. Hackenberg and Domenico Bonaccini "Single-mode fiber relay for the ESO laser guide star facility", Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); https://doi.org/10.1117/12.390327

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