Three-dimensional femtosecond laser inscription of type a-based high-efficiency first-order waveguide Bragg gratings - Laberdesque, Romain; Loi, Laura; Guérineau, Théo; Khalil, Alain Abou; Danto, Sylvain; Cardinal, Thierry; Canioni, Lionel; Petit, Yannick (Advanced Optical Technologies, 2023)