Low-phase-noise, single-frequency, single-mode 608 W thulium fiber amplifier

A chain of four Tm-doped fibers amplified a single-frequency, 2040 nm diode laser to 608 W with M(2)=1.05+/-0.03, limited by available pump power. Stimulated Brillouin scattering limits were investigated by splicing different lengths of passive fiber to the output of the final amplifier stage. Integ...

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Bibliographic Details
Published in:Optics letters 2009-04, Vol.34 (8), p.1204-1206
Main Authors: GOODNO, Gregory D, BOOK, Lewis D, ROTHENBERG, Joshua E
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fiber lasers
Fiber optics
Fundamental areas of phenomenology (including applications)
Lasers
Optics
Physics
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Summary:A chain of four Tm-doped fibers amplified a single-frequency, 2040 nm diode laser to 608 W with M(2)=1.05+/-0.03, limited by available pump power. Stimulated Brillouin scattering limits were investigated by splicing different lengths of passive fiber to the output of the final amplifier stage. Integrated rms phase noise above 1 kHz was less than lambda/30, suggesting the possibility of further scaling via coherent beam combining. To our knowledge, this is the highest power obtained from any single-frequency, single-mode fiber laser.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.34.001204