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The paper illustrates the design of two pumping schemes for Mid-IR lasers based on photonic crystal fibers (PCFs) made of dysprosium doped chalcogenide glass Dy3+:Ga5Ge20Sb10S65. The simulation is performed by taking into account the spectroscopic parameters measured on the rare earth-doped glass sample in order to perform a realistic feasibility investigation. The first pump scheme provides an optical...
In this paper some preliminary results pertaining to the design and fabrication of rare-earth doped chalcogenide microresonators for lasing in mid-infrared (Mid-IR) wavelength range are illustrated. The unique properties of chalcogenide glass and the Whispering Gallery Mode (WGM) resonances make possible to obtain light emission via rare-earth transitions at long wavelengths. As example, a light source...
The paper deals with the design of a medium infrared (Mid-IR) light source based on a microstructured fiber made of dysprosium doped chalcogenide glass, Dy3+:Ga5Ge20Sb10S65. It is constituted by the cascade of a laser cavity and an optical amplifier which could be fabricated in the same microstructured fiber. In order to obtain realistic results, the simulation is performed by taking into account...
The paper illustrates the design and the optimization of a medium infrared (Mid-IR) microstructured fiber laser based on dysprosium doped chalcogenide glass, Dy3+:Ga5Ge20Sb10S65. 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...
The paper is a review on modelling and experimental results regarding microsphere resonators. The applications of the whispering-gallery-modes (WGMs) resonances in conventional glass microspheres to perform chemical spectroscopy, biomedical sensing, low threshold lasing are recalled. The behaviour of silica microsphere coated via silica hafnia 70SiO2-30HfO2 and activated with 0.3% mol Er3+ for NIR...
A mid-IR amplifier constituted of a tapered chalcogenide fiber coupled to an Er3+-doped chalcogenide microsphere has been optimized via a particle swarm optimization (PSO) algorithm. The numerical model is based on the coupled mode theory and on the erbium rate equations, including the main transitions among the ion energy levels. The PSO has allowed the optimal choice of the microsphere and taper...
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