Title :
Er:LiLuF4 upconversion waveguide laser with femtosecond-laser written circular cladding structures
Author :
Moglia, Francesca ; Muller, Sebastian ; Calmano, Thomas ; Krankel, Christian ; Huber, Gunter
Author_Institution :
Inst. fur Laser-Phys., Univ. Hamburg, Hamburg, Germany
Abstract :
The common scheme of femtosecond-laser inscription of waveguides in fluorides is a cladding geometry. The first crystalline Er:LiLuF4-upconversion waveguide laser is reported somewhere else. The poor stability and efficiency of the green emission were caused by nonoptimized cavity and fabrication parameters. In this paper, the mentioned drawbacks were tried to be overcome and an improvement in stability and output power is shown by the application of a circular cladding geometry. An output power of 10 mW at 552.6 nm could be achieved, with an incident pump power on the crystal of 1.5 W at 974 nm.
Keywords :
claddings; erbium; high-speed optical techniques; laser stability; lithium compounds; lutetium compounds; solid lasers; waveguide lasers; Er:LiLuF4 upconversion waveguide laser; LiLuF4:Er; circular cladding geometry; femtosecond-laser written circular cladding structures; green emission; output power; power 1.5 W; power 10 mW; stability; wavelength 552.6 nm; wavelength 974 nm; Crystals; Laser excitation; Measurement by laser beam; Power generation; Pump lasers; Semiconductor lasers; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/IQEC), 2013 Conference on and International Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4799-0593-5
DOI :
10.1109/CLEOE-IQEC.2013.6801381
