Low-loss fs-laser-written surface waveguide lasers at >2  µm in monoclinic Tm3+:MgWO4

[EN]Surface channel waveguides (WGs) based on a half-ring (40–60-µm-diameter) depressed-index cladding (type III) geometry are fabricated in monoclinic Tm3+:MgWO4 by femtosecond (fs) laser writing at a repetition rate of 1 kHz. The WGs are characterized by confocal laser microscopy and -Raman spectr...

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Detalles Bibliográficos
Autores: Kifle, Esrom, Loiko, Pavel, Vázquez de Aldana, Javier R., Romero Vázquez, Carolina, Llamas, Victor, Serres, Josep Maria, Aguiló, Magdalena, Díaz, Francesc, Zhang, Lizhen, Lin, Zhoubin, Lin, Haifeng, Zhang, Ge, Zakharov, Viktor, Veniaminov, Andrey, Petrov, Valentin, Griebner, Uwe, Mateos, Xavier, Wang, Li, Chen, Weidong
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/147196
Acceso en línea:http://hdl.handle.net/10366/147196
Access Level:acceso abierto
Palabra clave:Channeled waveguides
Confocal microscopy
Laser beams
Polarized light
Ti:sapphire lasers
Waveguide lasers
Descripción
Sumario:[EN]Surface channel waveguides (WGs) based on a half-ring (40–60-µm-diameter) depressed-index cladding (type III) geometry are fabricated in monoclinic Tm3+:MgWO4 by femtosecond (fs) laser writing at a repetition rate of 1 kHz. The WGs are characterized by confocal laser microscopy and -Raman spectroscopy. A Tm3+:MgWO4 WG laser generates 320 mW at ∼2.02µm with a slope efficiency of 64.4%. The WG emits a transverse single-mode and linear polarization (||). A remarkable low loss of <0.1dB/cm is measured for the WG. Vibronic laser emission at ∼2.08µm is also achieved.

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