Publications

(Texte original anglais seulement) The thermal degradation of double clad optical fiber coatings is known to be the prime limiting factor for the operation of high power CW fiber lasers. In this paper, we conduct a study of thermal effects in high power CW fiber lasers. A particular focus is...

(Texte original anglais seulement) A large number of high power CW fiber lasers described in the literature use large mode area (LMA) double cladding fibers. These fibers have large core and low core numerical aperture (NA) to limit the number of supported modes and are typically operated under coiling to...

(Texte original anglais seulement) We designed a high output power double cladding erbium-ytterbium fibre amplifier that showed no amplified spontaneous emission (ASE) at 1.0 µm using a quasi singlemode fibre. The reduction of the amplified stimulated emission (ASE) at 1.0 µm was found to be the combination of fibre design...

(Texte original anglais seulement) A single cladding ytterbium doped fibre amplifier pumped at 980 nm that exhibits negligible amount of photodarkening over a long period of time is demonstrated. The output power as a function of time decreased by a very small factor compared to standard single mode ytterbium fibres....

(Texte original anglais seulement) Highly doped EDFs with 13.4 to 34.7-dB/m absorption coefficients were inserted in a two-stage EDFA to enable a MSA-compliant packaging. Experimental validations led to the design of a low noise 20-dBm single-pumped WDM Lband EDFA.

(Texte original anglais seulement) We developed a model that accurately predicts the performances of high power double cladding erbium ytterbium fibre amplifiers. We experimentally validate the model in co- and counter-propagation configuration for different pump wavelengths and fibre lengths. By adjusting the ytterbium to erbium cross-relaxation rate with a simple...