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Chalcogenide glass microsphere laser.

Gregor R Elliott¹, G Senthil Murugan, James S Wilkinson

¹Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.

|December 18, 2010

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Researchers achieved laser action in a neodymium-doped chalcogenide glass microsphere. This advancement in optical materials demonstrates potential for new laser technologies.

Area of Science:

Materials Science
Optics and Photonics
Laser Physics

Background:

Chalcogenide glasses are promising optical materials but often suffer from thermal instability.
Microspheres offer high Q-factors, enabling efficient light-matter interactions for laser applications.
Neodymium doping introduces active ions necessary for laser emission.

Purpose of the Study:

To demonstrate laser action in a neodymium-doped gallium lanthanum sulphide glass microsphere.
To investigate the influence of thermal stability and microcavity properties on laser performance.
To explore the effects of pump power on laser output characteristics.

Main Methods:

Fabrication of a sub-millimeter neodymium-doped gallium lanthanum sulphide glass microsphere.

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Last Updated: Jun 5, 2026

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Published on: August 19, 2016

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Pumping the microsphere with a laser diode at 808 nm.

Characterization of laser action, including spectral analysis and output power variation.

Main Results:

Successful demonstration of single and multimode laser action between 1075 and 1086 nm.
Gallium lanthanum sulphide glass exhibited enhanced thermal stability, crucial for laser operation.
Observed spectral changes with varying pump power indicated significant nonlinear and/or thermal effects.

Conclusions:

Neodymium-doped gallium lanthanum sulphide glass microspheres can function as efficient laser sources.
The material's thermal stability and optimized microcavity Q-factor are key to achieving laser action.
Nonlinear and thermal effects play a critical role in the laser dynamics of these microspheres.