A Nd3+-doped tellurite-glass terrace microsphere was fabricated, and its laser characteristics using free-space pumping were investigated. A localized laser heating technique was used for preparing the 29-µm-diameter microsphere. The uncoated sphere exhibited many laser lines with 1.3-mW threshold. Fewer laser lines were observed after terrace formation. The terrace microsphere’s lasing threshold was 0.6–2.4 mW depending on the pumping position in the terrace. These results indicate that the terrace structure can modify the modes of a microsphere laser and decrease the laser threshold due to an increase in the coupling efficiency between the cavity and free-space beam.

Quasi-single mode laser output from a terrace structure added on a Nd3+-doped tellurite-glass microsphere prepared using localized laser heating / T., Kishi; T., Kumagai; S., Shibuya; Prudenzano, Francesco; T., Yano; S., Shibata. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 23:16(2015), pp. 20629-20635. [10.1364/OE.23.020629]

Quasi-single mode laser output from a terrace structure added on a Nd3+-doped tellurite-glass microsphere prepared using localized laser heating

PRUDENZANO, Francesco;
2015-01-01

Abstract

A Nd3+-doped tellurite-glass terrace microsphere was fabricated, and its laser characteristics using free-space pumping were investigated. A localized laser heating technique was used for preparing the 29-µm-diameter microsphere. The uncoated sphere exhibited many laser lines with 1.3-mW threshold. Fewer laser lines were observed after terrace formation. The terrace microsphere’s lasing threshold was 0.6–2.4 mW depending on the pumping position in the terrace. These results indicate that the terrace structure can modify the modes of a microsphere laser and decrease the laser threshold due to an increase in the coupling efficiency between the cavity and free-space beam.
2015
Quasi-single mode laser output from a terrace structure added on a Nd3+-doped tellurite-glass microsphere prepared using localized laser heating / T., Kishi; T., Kumagai; S., Shibuya; Prudenzano, Francesco; T., Yano; S., Shibata. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 23:16(2015), pp. 20629-20635. [10.1364/OE.23.020629]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/3180
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