Spectroscopic analysis of the Er3+ (4f11) absorption intensities in NaBi(WO4)2

Dhiraj K. Sardar; Charles C. Russell III; Raylon M. Yow; John B. Gruber; Bahram Zandi; Edvard P. Kokanyan

doi:10.1117/12.523807

8 July 2004 Spectroscopic analysis of the Er³⁺(4f¹¹) absorption intensities in NaBi(WO₄)₂

Dhiraj K. Sardar, Charles C. Russell III, Raylon M. Yow, John B. Gruber, Bahram Zandi, Edvard P. Kokanyan

Proceedings Volume 5332, Solid State Lasers XIII: Technology and Devices; (2004) https://doi.org/10.1117/12.523807
Event: Lasers and Applications in Science and Engineering, 2004, San Jose, Ca, United States

Abstract

A spectroscopic analysis is performed on Er3+ (4f11) ions doped in order to assess this material for its potential as a near infrared laser. The Judd-Ofelt model is applied to the room temperature absorption intensities of Er³⁺(4f¹¹) in NaBi(WO₄)₂ to obtain the three phenomenological intensity parameters: Ω₂ = 5.50 x 10^-20cm², Ω₄ = 1.00 x 10^-20cm², and Ω6 = 0.71 x 10^-20cm². The intensity parameters are then used to determine the radiative decay rates (emission probabilities), radiative lifetimes, and branching ratios for the Er³⁺transitions from the excited state multiplet manifolds to the lower-lying manifold states. Using the radiative decay rates for the Er³⁺(4f¹¹) transitions between the corresponding excited states and the lower-lying states, the radiative lifetimes of eight excited states of Er³⁺are determined in this host. Using the room temperature fluorescence lifetime and the radiative lifetime of the ⁴I_13/2→⁴I_15/2(1.52 µm) transition of Er³⁺in NaBi(WO₄)₂, the quantum efficiency is determined to be 84% for this laser material.

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Dhiraj K. Sardar, Charles C. Russell III, Raylon M. Yow, John B. Gruber, Bahram Zandi, and Edvard P. Kokanyan "Spectroscopic analysis of the Er³⁺(4f¹¹) absorption intensities in NaBi(WO₄)₂", Proc. SPIE 5332, Solid State Lasers XIII: Technology and Devices, (8 July 2004); https://doi.org/10.1117/12.523807

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