Optical bistability in Er-Yb co-doped phosphate glass microspheres at room temperature

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Optical bistability in Er-Yb co-doped phosphate glass microspheres at room temperature

Ward, Jonathan M.; O'Shea, Danny G.; Shortt, Brian J.; Nic Chormaic, Síle
Date: 2007-07-20
Copyright: © 2007, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Ward, J.M., O'Shea, D.G., Shortt, B.J., Nic Chormaic, S., 2007. Optical bistability in Er-Yb co-doped phosphate glass microspheres at room temperature. Journal of Applied Physics, 102(2), pp.023104-1 - 023104-7 and may be found at http://link.aip.org/link/doi/10.1063/1.2753591
Copyright information: http://jap.aip.org/about/rights_and_permissions
Related: http://link.aip.org/link/doi/10.1063/1.2753591
Citation: Ward, J.M., O'Shea, D.G., Shortt, B.J., Nic Chormaic, S., 2007. Optical bistability in Er-Yb co-doped phosphate glass microspheres at room temperature. Journal of Applied Physics, 102(2), pp.023104-1 - 023104-7
Published Version: 10.1063/1.2753591

Abstract:

We experimentally demonstrate optical bistability in Er3+-Yb3+ phosphate glass microspheres at 295 K. Bistability is associated with both Er3+ fluorescence and lasing behavior, and chromatic switching. The chromatic switching results from an intrinsic mechanism exploiting the thermal coupling of closely spaced energy levels, and occurs simultaneously with the intensity switching. A contrast ratio of 2.8 has been obtained for chromatic switching. The intensity switching shows ratios of 21 for 520 nm and 11 for 660 nm fluorescence emissions, and 11 for IR lasing at 1.5 μm. Concurrent with these observations, we investigate a temperature-dependent absorption of pump power, which exhibits bistable behavior. The influences of the host matrix on lasing and fluorescence mechanisms are highlighted.

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