Optical absorption and multiphonon relaxation of Nd3+ ions in ZnCl2-based glass

1077-3118

AIP Digital Archive

Physics

Optical absorption and multiphonon relaxation have been investigated for Nd3+-doped ZnCl2-based glass. The intensity parameters for radiative transitions of Nd3+ were determined to be Ω2=4.97×10−20 cm2, Ω4=7.39×10−20 cm2 and Ω6=5.12×10−20 cm2. All of the Ωt parameters, especially Ω4, of Nd3+ in the ZnCl2-based glass were large compared with those reported for oxide and fluoride glasses. Multiphonon relaxation rates for three emission levels of Nd3+ were determined from lifetime measurements. The multiphonon relaxation rates in the ZnCl2-based glass were extremely low, because of the low-phonon-energy of the matrix. Values were found to obey the energy-gap law in the same manner as the values in Er3+-doped ZnCl2-based glasses. © 1998 American Institute of Physics.

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