A 24 cm gain-shifted Tm3+-Yb3+-codoped tellurite fibre employing novel high concentration doping technique and using 980 nm diode laser single-wavelength pumping is demonstrated with a maximum gain of 6 dB at 1490 nm and a gain range of 1475~1505 nm.
The main aim of this paper is to demonstrate potential materials and fibres for 589 nm and 569 nm high-power laser sources, which can be developed by using rare-earth ions (Eu3+, Sm3+) as dopants in glass fibres. In this paper, we also discuss the advantages of using high-power excitation sources: for example the NIR semiconductors at 980 nm and 800 nm and high-power Yb-fibre laser based systems for high-power upconverted lasers. In this context the spectroscopic properties of Eu3+-Er3+ and Sm3+- based glass and fibre systems are also discussed in bulk oxide glasses and in fibre geometries for designing lasers at 589 nm and 569 nm for adaptive optics.
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