Optimization of Mid-IR microstructured fiber laser based on dysprosium doped chalcogenide glass

Abstract

The paper illustrates the design and the optimization of a medium infrared (Mid-IR) microstructured fiber laser based on dysprosium doped chalcogenide glass, Dy 3+ :Ga 5 Ge 20 Sb 10 S 65 . The investigation is performed realistically, by taking into account the spectroscopic parameters measured on samples of the aforesaid glasses. The aim is to investigate the feasibility of optical beam generation close to 4.4 µm wavelength. An output power of 107.2 mW with an input pump power of 1 W is calculated. This result indicates that the designed laser configuration can lead to a feasible medium infrared source which could find application in optical free propagation, biomedicine and sensing.

Numerical and experimental investigation of mid-infrared laser action in resonantly pumped Pr3+ doped chalcogenide fibre

“…This difference is due to the larger pump cross section for longer pump wavelengths and the weaker ESA contribution which results in a shorter fibre length and correspondingly smaller attenuation loss. The calculated optical-tooptical efficiencies reported in the literature for chalcogenide fibre lasers doped with Pr 3+ , Dy 3+ and Tb 3+ were below 45% (Quimby et al 2008;Sójka et al 2012;Hu et al 2015;Falconi et al 2015Falconi et al , 2016. Therefore resonantly pumping shows a clear advantage in comparison to these previously reported results.…”