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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 5 — Feb. 27, 2012
  • pp: 5742–5753

Distributed mode filtering rod fiber amplifier delivering 292W with improved mode stability

Marko Laurila, Mette M. Jørgensen, Kristian R. Hansen, Thomas T. Alkeskjold, Jes Broeng, and Jesper Lægsgaard  »View Author Affiliations


Optics Express, Vol. 20, Issue 5, pp. 5742-5753 (2012)
http://dx.doi.org/10.1364/OE.20.005742


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Abstract

We demonstrate a high power fiber (85μm core) amplifier delivering up to 292Watts of average output power using a mode-locked 30ps source at 1032nm. Utilizing a single mode distributed mode filter bandgap rod fiber, we demonstrate 44% power improvement before the threshold-like onset of mode instabilities by operating the rod fiber in a leaky waveguide regime. We investigate the guiding dynamics of the rod fiber and report a distinct bandgap blue-shifting as function of increased signal power level. Furthermore, we theoretically analyze the guiding dynamics of the DMF rod fiber and explain the bandgap blue-shifting with thermally induced refractive index change of the refractive index profile.

© 2012 OSA

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 14, 2011
Revised Manuscript: February 16, 2012
Manuscript Accepted: February 21, 2012
Published: February 24, 2012

Citation
Marko Laurila, Mette M. Jørgensen, Kristian R. Hansen, Thomas T. Alkeskjold, Jes Broeng, and Jesper Lægsgaard, "Distributed mode filtering rod fiber amplifier delivering 292W with improved mode stability," Opt. Express 20, 5742-5753 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-5-5742


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References

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