Pump-induced chromatic switching is reported for an 808 nm pumped Yb3+ -doped NdP O4 crystal. This effect is based on the interplay between the Nd3+ ↔ Yb3+ energy transfer processes and on the large pump-induced thermal loading characteristic of this neodymium compound. For temperatures below 300 K, a noticeable hysteresis is observed in the relative Nd3+ and Yb3+ contributions to the emission spectra; this leads to a bistable chromatic switching. This optical bistability is related to a nonlinear pump-induced heating rate that produces abrupt changes in the local temperature
Bistable chromatic switching in Yb3+ doped NdPO4 crystals
SPEGHINI, Adolfo;BETTINELLI, Marco Giovanni
2006-01-01
Abstract
Pump-induced chromatic switching is reported for an 808 nm pumped Yb3+ -doped NdP O4 crystal. This effect is based on the interplay between the Nd3+ ↔ Yb3+ energy transfer processes and on the large pump-induced thermal loading characteristic of this neodymium compound. For temperatures below 300 K, a noticeable hysteresis is observed in the relative Nd3+ and Yb3+ contributions to the emission spectra; this leads to a bistable chromatic switching. This optical bistability is related to a nonlinear pump-induced heating rate that produces abrupt changes in the local temperature
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