Author, as appears in the article.: Kifle, Esrom; Loiko, Pavel; Romero, Carolina; de Aldana, Javier Rodriguez Vazquez; Zakharov, Viktor; Veniaminov, Andrey; Griebner, Uwe; Petrov, Valentin; Camy, Patrice; Braud, Alain; Aguilo, Magdalena; Diaz, Francesc; Mateos, Xavier;
Department: Química Física i Inorgànica
URV's Author/s: Aguiló Díaz, Magdalena / Díaz González, Francisco Manuel / Mateos Ferré, Xavier
Keywords: Y-splitters Written Writing Waveguide lasers Wave-guide laser Ultrafast optics Thulium ions Silicon Raman Optical waveguides Optical surface waves Optical device fabrication Laser operation Klu(wo4)(2) Interferometers Femtosecond laser writing Fabrication Efficient Crystals Circuits Channel waveguides Beam-splitters
Abstract: We report on the first active surface Y-branch waveguide in the similar to 2 mu m spectral range. Depressed-cladding rectangular-cross-section surface waveguides with a splitting ratio of 1 x 2 are fabricated by femtosecond direct laser writing in a thulium (Tm3+) doped monoclinic double tungstate crystal. Confocal laser microscopy and mu-Raman spectroscopy reveal well preserved crystallinity of the waveguide core. Under high-brightness laser pumping at 0.8 mu m, a simultaneous continuous-wave laser operation in both arms is achieved resulting in a total output power of 0.46 W at similar to 1.84 mu m with a slope efficiency of 40.6% and a laser threshold of 0.28 W. The laser output is linearly polarized and spatially multimode (TE12/TE22) with a power splitting ratio between arms of 52.1/47.9%). The waveguide propagation losses at 1.84 mu m are similar to 1.6 dB/cm and the loss from the Y-junction is 0.1 dB. The fabricated waveguides represent a route towards advanced photonic micro-structures such as a Mach-Zehnder interferometer for bio-sensing at similar to 2 mu m.
Thematic Areas: Telecommunications Química Optics Odontología Matemática / probabilidade e estatística Interdisciplinar Engineering, electrical & electronic Engenharias iv Engenharias iii Ciência da computação Atomic and molecular physics, and optics Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 07338724
Author's mail: f.diaz@urv.cat xavier.mateos@urv.cat magdalena.aguilo@urv.cat
Author identifier: 0000-0003-4581-4967 0000-0003-1940-1990 0000-0001-6130-9579
Record's date: 2024-04-27
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.osapublishing.org/jlt/abstract.cfm?uri=jlt-38-16-4374
Papper original source: Journal Of Lightwave Technology. 38 (16): 4374-4384
APA: Kifle, Esrom; Loiko, Pavel; Romero, Carolina; de Aldana, Javier Rodriguez Vazquez; Zakharov, Viktor; Veniaminov, Andrey; Griebner, Uwe; Petrov, Valent (2020). Ultrafast Laser Inscription and similar to 2 mu m Laser Operation of Y-Branch Splitters in Monoclinic Crystals. Journal Of Lightwave Technology, 38(16), 4374-4384. DOI: 10.1109/JLT.2020.2986474
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1109/JLT.2020.2986474
Entity: Universitat Rovira i Virgili
Journal publication year: 2020
Publication Type: Journal Publications
Repositori URV