Compartir
Título
Ultrafast laser inscribed waveguide lasers in Tm:CALGO with depressed-index cladding
Autor(es)
Materia
Fiber lasers
Laser operation
Mode locking
Raman fiber lasers
Raman lasers
Ultrafast lasers
Fecha de publicación
2020-02
Citación
Victor Llamas, Pavel Loiko, Esrom Kifle, Carolina Romero, Javier R. Vázquez de Aldana, Zhongben Pan, Josep Maria Serres, Hualei Yuan, Xiaojun Dai, Huaqiang Cai, Yicheng Wang, Yongguang Zhao, Viktor Zakharov, Andrey Veniaminov, Romain Thouroude, Mathieu Laroche, Hervé Gilles, Magdalena Aguiló, Francesc Díaz, Uwe Griebner, Valentin Petrov, Patrice Camy, and Xavier Mateos, "Ultrafast laser inscribed waveguide lasers in Tm:CALGO with depressed-index cladding," Opt. Express 28, 3528-3540 (2020)
Resumen
Depressed-index buried and surface channel waveguides (type III) are produced in a bulk 3.5 at.% Tm3+:CALGO crystal by femtosecond direct-laser-writing at kHz repetition rate. The waveguides are characterized by confocal microscopy and µ-Raman spectroscopy. Under in-band-pumping at 1679 nm (3H6 → 3F4 transition) by a Raman fiber laser, the buried channel waveguide laser with a circular cladding (diameter: 60 µm) generated a continuous-wave output power of 0.81 W at 1866-1947 nm with a slope efficiency of 71.2% (versus the absorbed pump power) and showed a laser threshold of 200 mW. The waveguide propagation losses were as low as 0.3 ± 0.2 dB/cm. The laser performance under in-band pumping was superior compared pumping at ∼800 nm (3H6 → 3H4 transition), i.e., the convetional pump wavelength. Vibronic laser emission from the WG laser above 2 µm is also achieved. The low-loss behavior, the broadband emission properties and good power scaling capabilities indicate the suitability of Tm3+:CALGO waveguides for mode-locked laser operation at ∼2 µm.
URI
DOI
10.1364/OE.384258
Colecciones
- ALF. Artículos [297]
Ficheros en el ítem
Excepto si se señala otra cosa, la licencia del ítem se describe como Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.