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Related Experiment Video

Updated: Jul 15, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

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Temperature sensing behaviour of the stark sublevels.

Vineet Kumar Rai¹, S B Rai

¹Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi, India. vineetkrrai@yahoo.co.in

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy

|April 17, 2007

Summary

Researchers studied temperature sensing in Erbium-doped tellurite glass using fluorescence intensity ratios. The findings show potential for accurate temperature monitoring within a specific range.

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Area of Science:

Materials Science
Spectroscopy
Optics

Background:

Erbium (Er3+) doped glasses are investigated for optical applications.
Fluorescence properties of rare-earth ions are sensitive to temperature variations.

Purpose of the Study:

To investigate the temperature dependence of the fluorescence intensity ratio of Stark components in Er3+ doped tellurite glass.
To evaluate the potential of this system for temperature sensing applications.

Main Methods:

Utilized 800 nm radiation from a Ti-sapphire laser, pumped by a Nd:YVO4 laser.
Analyzed the fluorescence intensity ratio of the two Stark components of the (4)S(3/2) → (4)I(15/2) transition.
Measured temperature dependence in the range of 300-550 K.

Main Results:

Observed a temperature dependence in the fluorescence intensity ratio of the Stark components.
Demonstrated that this ratio exhibits appreciable sensitivity to temperature changes.
The specific transition (4)S(3/2) → (4)I(15/2) was found to be suitable for thermometry.

Conclusions:

The fluorescence intensity ratio of the Stark components of the (4)S(3/2) → (4)I(15/2) transition in Er3+ doped tellurite glass can be used for temperature monitoring.
The system shows promise for non-contact thermometry within the 300-550 K range.