Abstract
Depressed-cladding surface channel waveguides were inscribed in a 0.5 at.% Pr:LiYF4 crystal by femtosecond Direct Laser Writing. The waveguides consisted of a half-ring cladding (inner diameter: 17 µm) and side structures (“ears”) improving the mode confinement. The waveguide propagation loss was as low as 0.14 ± 0.05 dB/cm. The orange waveguide laser operating in the fundamental mode delivered 274 mW at 604.3 nm with 28.4% slope efficiency, a laser threshold of only 29 mW and linear polarization (π), representing record-high performance for orange Pr waveguide lasers.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Florent Starecki, Western Bolaños, Alain Braud, Jean-Louis Doualan, Gurvan Brasse, Abdelmjid Benayad, Virginie Nazabal, Bin Xu, Richard Moncorgé, and Patrice Camy
Opt. Lett. 38(4) 455-457 (2013)
Sebastian Müller, Thomas Calmano, Philip Metz, Nils-Owe Hansen, Christian Kränkel, and Günter Huber
Opt. Lett. 37(24) 5223-5225 (2012)
Davide Baiocco, Ignacio Lopez-Quintas, Javier R. Vázquez de Aldana, Mauro Tonelli, and Alessandro Tredicucci
Opt. Lett. 48(7) 1734-1737 (2023)