Tommy Boilard

Aug 2, 2024 | opg.optica.org | John M. Ballato |Martin Bernier |Thomas Hawkins |Tommy Boilard

Recent progress in the fabrication of Yb-doped silicate fibers with low concentration quenching and low background absorption loss has led to the demonstration of anti-Stokes-fluorescence cooling in several aluminosilicate compositions. This breakthrough is critical to combat deleterious thermal effects due to the quantum defect in fiber lasers and amplifiers. Since cooling efficiencies remain low (1–2.7%), it is paramount to engineer compositions that improve this metric.

May 22, 2023 | opg.optica.org | Martin Bernier |Tommy Boilard |Réal Vallée |Daniel Nadeau

AbstractWe report a tunable all-fiber laser emitting a maximum output power of 2.55 W around 3240 nm. The fiber laser cavity based on a fluoride fiber doped with dysprosium ions yields an efficiency of 42% according to the in-band launched pump power at 2825 nm. Due to a custom piezoelectric fiber Bragg grating (FBG) package, mechanical strains applied to the narrowband FBG used as the input cavity coupler allowed for fast tuning of the emission wavelength over a spectral range of 1.5 nm.