title: Channel waveguide lasers in Nd:LGS crystals.
abstract: Optical channel waveguides have been produced in Nd:LGS laser crystals by using ultrafast laser inscription with a depressed cladding configuration. The cross sectional shape of the cladding waveguides is circular, surrounded by low refractive index tracks, which makes the channel waveguides as three-dimensional tubular structures. Under optical pump of 810 nm light, continuous-wave waveguide lasers at 1068 nm have been achieved at room temperature, with minimum lasing threshold of 54 mW, a maximum slope efficiency of 24% and a maximum output power of 16 mW.
authors.affiliation: School of Physics, State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation, Ministry of Education, Shandong University, Jinan 250100, China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Ren
authors.forename: Javier R
authors.initials: JR
authors.lastname: Vázquez de Aldana
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Huaijin
authors.initials: H
authors.lastname: Zhang