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Applied Physics Letters

TWO-STEP EXCITATION IN ERBIUM-DOPED CADMIUM FLUORIDE

L. Esterowitz, J. Noonan

Published Nov 15, 1965• 18 citations
Publisher
DOI
10.1063/1.1754259

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Polarization hole burning, PHB, has been observed in erbium doped fiber amplifiers[1]. PHB is an anisotropic saturation created when a polarized saturating signal is launched into the erbium doped fiber. A corresponding anisotropic gain is also created. The gain, measured with a weak probe, is found to be larger for a probe polarized orthogonal to the saturating signal compared to a probe polarized parallel to the saturating signal. The effect is typically expressed as the gain difference, δG, (in dB) for the two probe polarizations.