Influence of Y2O3 Content on Structural, Optical, Spectroscopic, and Laser Properties of Er3+, Yb3+ Co-Doped Phosphate Glasses

Jan Šulc,Vilma Lahti,Václav Prajzler,Laeticia Petit,Karel Veselský,Helena Jelínková

doi:10.3390/ma14144041

Jan Šulc, Vilma Lahti + Show 4 more

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https://doi.org/10.3390/ma14144041

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Abstract

The influence of the addition of Y2O3 on the structural, spectroscopic, and laser properties of newly prepared Er, Yb-doped strontium-sodium phosphate glass was investigated. While the addition of Y2O3 has a small influence on the absorption spectra and fluorescence lifetime, it has a strong impact on the emission cross-section and on OH− content. The glasses were used as the active medium for diode-pumped laser emitting at 1556 nm. The increase in Y2O3 content leads to a significant 35% increase in laser slope efficiency up to 10.4%, but at the expense of the substantial reduction of the wavelength tunability from 82 to 54 nm.

Highlights

The trivalent erbium (Er3+ )-doped solid-state glass lasers and amplifiers, operating on the 4 I13/2 → 4 I15/2 transition, are well-known and reliable sources of “eye-safe” laser radiation around 1550 nm wavelength, which is located within the ultra-low-loss telecommunication window of glass [1,2]
Er -doped glasses in the P2O5-SrO-Na2 been intensively investigated [20,31], and we demonstrated that the spect phosphate glasses can promote the above-mentioned advantages of phosphate glass erties oftothe can be impacted by adding a in small amount ofofAl2O3, T
The influence of the Y2O3 addition on the structural, the system have been intensively investigated [20,31], and we demonstrated that the spectroscopic, and laser new sodium-strontium-phosphate glass is p scopic properties of the properties glasses can beof impacted by adding a small amount of Al2 O3, TiO

Summary

Introduction

The trivalent erbium (Er3+ )-doped solid-state glass lasers and amplifiers, operating on the 4 I13/2 → 4 I15/2 transition, are well-known and reliable sources of “eye-safe” laser radiation around 1550 nm wavelength, which is located within the ultra-low-loss telecommunication window of glass [1,2]. Emission in this wavelength range has a wide range of applications, such as range-finding [3], remote sensing [4], medicine [5,6], optical communications [7,8], and others [9]. Lasers from phosphate glass are usually driven at low repetition rates; the CW regime can be achieved [14,15]

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