Nonlinear optical properties of Er3+ ions doped TeO2-Li2O-WO3 glass by 800nm femtosecond laser excitation

Ghizal F. Ansari; S. K. Mahajan; J. Parashar

doi:10.1117/12.908085

15 February 2012 Nonlinear optical properties of Er³⁺ ions doped TeO₂-Li₂O-WO₃ glass by 800nm femtosecond laser excitation

Ghizal F. Ansari, S. K. Mahajan, J. Parashar

Author Affiliations +

Proceedings Volume 8240, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI; 82401L (2012) https://doi.org/10.1117/12.908085
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

Upconversion and nonlinear optical properties of the glasses have been studied. Optical band gap value 3.52eV calculated from the linear optical absorption measurement of the glass. The green upconversion emission of Er3+ ions from ²H_11/2 → ⁴I_15/2 to ⁴S_3/2 → ⁴I_15/2 transitions have been measured under femtosecond laser excitation of 100fs pulse at 80Mhz repetition at 800nm wavelength .Upcoversion emission intensity variation was observed on laser pump power from 50mW to 100mW and confirmed that two photon processes are involved at lower pump power . The nonlinear absorption has been measured by z-scan measurements using 100fs laser pulse and optical nonlinearity of the glass was calculated. The relationship between the nonlinear optical properties and the glass structures estimated by Raman spectroscopy was discussed. The nonlinearity of these TWL glasses increased as the stretching Raman band of TeO4increased, while the stretching band of TeO₃ decreased. This indicate that amount of TeO₄ units was deeply related to the third order non-linearity.

Citation Download Citation

Ghizal F. Ansari, S. K. Mahajan, and J. Parashar "Nonlinear optical properties of Er³⁺ ions doped TeO₂-Li₂O-WO₃ glass by 800nm femtosecond laser excitation", Proc. SPIE 8240, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI, 82401L (15 February 2012); https://doi.org/10.1117/12.908085

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