Highly sensitive beam quality measurements on large-mode-area fiber amplifiers | Zendy

P. Weßels | Zendy; Carsten Fallnich | Zendy

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Highly sensitive beam quality measurements on large-mode-area fiber amplifiers

Author(s) -

P. Weßels,

Carsten Fallnich

Publication year - 2003

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.11.003346

Subject(s) - optics , materials science , laser beam quality , amplifier , beam (structure) , fiber , fiber laser , mode volume , mode (computer interface) , single mode optical fiber , power (physics) , optical fiber , optoelectronics , polarization maintaining optical fiber , laser beams , fiber optic sensor , laser , physics , composite material , operating system , cmos , quantum mechanics , computer science

The beam quality of large-mode-area fiber amplifiers was investigated at the 10 W power level using a tunable ring cavity, that is also used in the laboratory system of GEO600 as a pre-mode-cleaner for mode filtering. More than 98% of the overall output power were contained within the polarized (200:1) TEM00 mode with an appropriate choice of coiling diameter. With the high sensitivity ring cavity analysis, the beam quality improvement caused by decreasing the coiling diameter was verified, while this could not be seen within conventional M2-measurements. The results are compared with the properties of single-mode fibers.

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