Quasi-Resonant Nonlinear Absorption for Optical Power Limiting: solgel-Processed Er3+-Doped Multicomponent Silica Glass
Applied Optics, Vol. 39, Issue 15, pp. 2433-2436 (2000)
http://dx.doi.org/10.1364/AO.39.002433
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Abstract
We demonstrate optical power limiting by what we believe to be a new mechanism of nonlinear absorption, which involves a quasi-resonant ground-state absorption that is either phonon assisted or assisted by the presence of defect sites (tail absorption). Such a mechanism provides high transmittance at low intensity yet optical limiting under cw conditions. The sample used was a novel solgel-processed Er3+-doped multicomponent silica glass. In this system the nonlinear absorption process is achieved because the resonant excited-state (4I13/2 → 4S3/2) absorption cross section is larger than the quasi-resonant ground-state (4I15/2 → 4I9/2) absorption cross section.
© 2000 Optical Society of America
[Optical Society of America ]
OCIS Codes
(160.5690) Materials : Rare-earth-doped materials
(230.1150) Optical devices : All-optical devices
(300.1030) Spectroscopy : Absorption
Citation
Glauco S. Maciel, Abani Biswas, Christopher S. Friend, and Paras N. Prasad, "Quasi-Resonant Nonlinear Absorption for Optical Power Limiting: solgel-Processed Er3+-Doped Multicomponent Silica Glass," Appl. Opt. 39, 2433-2436 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-15-2433
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