High efficiency diode-pumped Pr:LiLuF4 visible lasers in femtosecond-laser-written waveguides

Author:

Baiocco DavideORCID,Lopez-Quintas Ignacio1ORCID,Vázquez de Aldana Javier R.1,Tonelli Mauro,Tredicucci Alessandro

Affiliation:

1. Universidad de Salamanca

Abstract

In this work we investigate the power scaling of diode-pumped Pr:LiLuF4 waveguide lasers produced by direct femtosecond writing. The waveguides studied consisted in depressed cladding waveguides with different geometries. We observed laser emission at 604 nm, achieving a maximum output power of 275 mW and a slope efficiency of 40%, and 721 nm, demonstrating 310 mW of output power and a slope efficiency of 50%. Moreover, we obtained, what we believe is for the first time in a diode-pumped waveguide, laser emission at 523 nm, with a maximum output power of 65 mW and a slope efficiency of 11%. In the end, we also demonstrated the first diode-pumped operation of a single-transverse-mode waveguide laser at 721 nm, reaching a maximum output power of 28 mW and maintaining a high quality beam with an M2 of 1.1.

Funder

Ministerio de Ciencia, Innovación y Universidades

Consejería de Educación, Junta de Castilla y León

Publisher

Optica Publishing Group

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