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Proceedings Paper

Destructive random backscattering pulses showing Brillouin signature in MOPA fiber laser systems
Author(s): M. Melo; M. O. Berendt; J. M. Sousa
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Paper Abstract

The origin of random highly peaked backward pulses arising from(in) pulsed master oscillator power amplifier (MOPA) fiber lasers systems is studied. These large amplitude short duration pulses when compared to the Rayleigh backscattering may lead to catastrophic failures. This paper presents a systematic study of the backscatter using different seed sources (externally and directly modulated) in a hardened MOPA setup and a delayed self-heterodyne RF domain spectrum analysis technique for its characterization. Fabry-Perot seeded non-polarization maintaining system is found to show hallmark Brillouin frequency shift. The frequency of occurrence strongly depends on the seed characteristics.

Paper Details

Date Published: 26 February 2013
PDF: 7 pages
Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86011P (26 February 2013); doi: 10.1117/12.2001898
Show Author Affiliations
M. Melo, Multiwave Photonics SA (Portugal)
Univ. of Porto (Portugal)
M. O. Berendt, Multiwave Photonics SA (Portugal)
J. M. Sousa, Multiwave Photonics SA (Portugal)

Published in SPIE Proceedings Vol. 8601:
Fiber Lasers X: Technology, Systems, and Applications
Sami T. Hendow, Editor(s)

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