Spectral hole burning in Erbium-doped silica fiber was experimentally studied in a 100+ nm bandwidth. It was observed that the spectral holes overlap even for widely spaced saturating tones (>40 nm); thus, the conventional two-tone subtractive measurement technique cannot be used to separate the holes.
© 2003 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2410) Fiber optics and optical communications : Fibers, erbium
D. G. Foursa, A. N. Pilipetskii, D. Kovsh, M. Nissov, and S. M. Abbott, "Experimental observation of the complex shape of spectral holes in Erbium-doped silica fiber," in Optical Amplifiers and Their Applications, OSA Technical Digest Series (Optical Society of America, 2003), paper TuD2.
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