Abstract
We present a new theoretical scheme for a high-power -doped fiber amplifier assisted with a long period grating (LPG). This cladding-pumped amplifier is predicted to generate up to of continuous-wave output power at with a power conversion efficiency of . This device consists of an -doped cladding and an undoped core pumped with a high-power laser at a wavelength of . The LPG imprinted in the fiber core transfers a weak input signal propagating in the core mode of a single-mode fiber into a predetermined cladding mode, dramatically increasing the effective mode-area of the signal and the threshold powers for unwanted nonlinear effects such as stimulated Raman and Brillouin scattering. Depending on the choice of the cladding mode used for amplification, a second LPG imprinted at the end of the -doped fiber may be used to transfer the amplified signal into a large core output fiber with high efficiency, providing a high-quality output beam in a fundamental mode.
© 2008 Optical Society of America
Full Article | PDF ArticleMore Like This
Luciano Mescia
J. Opt. Soc. Am. B 25(11) 1833-1839 (2008)
Guillaume Canat, Jean-Claude Mollier, Jean-Pierre Bouzinac, Glenn M. Williams, Brian Cole, Lew Goldberg, Yves Jaouën, and Gabor Kulcsar
J. Opt. Soc. Am. B 22(11) 2308-2318 (2005)
J. W. Nicholson, R. Ahmad, A. DeSantolo, and Z. Várallyay
J. Opt. Soc. Am. B 34(3) A1-A6 (2017)