Time: Wednesday, 27/Aug/2025: 3:30pm - 5:00pm Session Chair: Sylvie Lebrun, Laboratoire Charles Fabry, Institut d'Optique, CNRS, Université Paris-Saclay, France |
Location: Collegezaal D |
INVITED
Impact of fabrication atmosphere on fluoride fibre tapering loss
1Department of Electrical and Computer Engineering, 3480 University Street, McGill University, Montréal, Canada, H3A 0E9; 2Department of Chemistry, 801 Sherbrooke Street, McGill University, Montréal, Canada, H3A 0B8
We report a significant reduction in taper transmission loss by processing ZBLAN fibre under a controlled argon environment. The contrast between tapers processed under argon and ambient air is highlighted through quantitative loss measurement as well as by investigating the surface morphology of the tapers using optical and electron microscopy.
Yb³⁺ Doped Crystal-in-Glass Optical Fibers
1Tampere University, Korkeakoulunkatu 3, 33720 Tampere, Finland; 2Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] – UMR 6226, F-35000 Rennes, France; 3Université Côte d'Azur, Institut de Physique de Nice, CNRS UMR7010, Nice, France
Composite optical fibers with Yb³⁺ doped crystals embedded in glass matrices combine the benefits of crystalline and glassy phases for photonic applications. This work demonstrates the feasibility of preparing composite fibers within glass systems. YbPO₄ crystals were incorporated into silica via solution doping of the soot layer during MCVD, followed by collapse and fiber drawing. Electron and Raman microscopy confirmed the survival of ~100 nm crystals after processing up to 2100 °C. Another fiber was prepared by embedding LiNbO₃:Yb³⁺ crystals in phosphate glass using a direct doping method. Both fibers demonstrate the potential of post-treatment-free, crystal-in-glass fibers for laser applications.
Point by Point Inscribed Tilted Fibre Bragg Gratings
1IRT Saint Exupery, B612, 3 Rue Tarfaya, 31400 Toulouse, France.; 2Laboratoire Hubert Curien, Batiment F, 18 Rue Professor Benoît Lauras 42000 Saint-Étienne, France.
To the best of our knowledge the inscription of tilted fibre Bragg
gratings via the point by point method, without beam shaping, has been demon-
strated for the first time. Using two parallel inscribed FBGs we have been able
to create cladding and core mode coupling effects indicative of a tilted FBG.
Wavelength Filtering in Negative Curvature Hollow-Core Fibers
1Bilkent University, Turkiye; 2Roger Williams University, USA
A negative curvature hollow-core fiber design with double pole-anchored cladding elements is numerically proposed for spectral filtering. The fiber structure is investigated for improvement in filtering ability through manipulation of the pole length. The findings reveal reduced confinement losses as low as 0.0003 dB/km for filtered and 0.0054 dB/km for unfiltered wavelengths yielding enhanced loss modulation depth.
All-fiber mid-infrared ring cavity laser
McGill university, Canada
We demonstrate the first all-fiber mid-infrared ring cavity laser. The laser comprises a single-mode ZBLAN optical fiber coupler, a tapered pump combiner, a polarization controller, and an Er:ZBLAN fiber. The laser is characterized with a pumping wavelength of 0.976 μm, exhibiting continuous wave emission in the wavelength band of 2.8 μm, with maximum output power of 36 mW.