Abstract

The numerical study on the performance of large-mode-area (LMA) fibers coiled onto a spool in high power amplifier is carried out as the bend-induced distortion of fiber modes severely affects the output characteristics of amplifier systems. The variations for high-order mode bend distortion with different orientations relative to the plane of the fiber bend are observed and shown. Concerning the practical applications, a bend-resistant LMA fiber with the mode area larger than 1000 \mum2 and excellent high-order mode suppression is designed completely by optimizing the refractive index (RI) and dopant profile. The results indicate that a hybrid profile of RI and dopant is the best choice for LMA fiber with coiling.

© 2009 Chinese Optics Letters

Design of large-mode-area amplifier fibers resistant to bend-induced distortion

John M. Fini
J. Opt. Soc. Am. B 24(8) 1669-1676 (2007)

Thermally induced mode loss evolution in the coiled ytterbium doped large mode area fiber

Lingchao Kong, Jinyong Leng, Pu Zhou, and Zongfu Jiang
Opt. Express 25(19) 23437-23450 (2017)

Design of microstructured single-mode fiber combining large mode area and high rare earth ion concentration

L. Lavoute, P. Roy, A. Desfarges-Berthelemot, V. Kermène, and S. Février
Opt. Express 14(7) 2994-2999 (2006)

Bend-compensated design of large-mode-area fibers

John M. Fini
Opt. Lett. 31(13) 1963-1965 (2006)

Bend-resistant design of conventional and microstructure fibers with very large mode area

John M. Fini
Opt. Express 14(1) 69-81 (2006)