9 March 2007 1.44-&mgr;m giant pulse generation
Author Affiliations +
We have compared two solid-state saturable absorbers for Q-switching of longitudinally diode-pumped Nd:YAG laser operating at wavelength 1444 nm: vanadium doped garnet (V3+:Y3Al2O5, V:YAG), and cobalt doped spinel (Co2+:MgAl2O4, Co:MALO). V:YAG crystal with initial transmission 91% was 2.2mm thick. Co:MALO crystal with initial transmission 91% was 2.0mm thick. Q-switched laser consisted of the Nd:YAG composite rod (8mm long Nd-doped part, 4mm long undoped YAG part) and the saturable absorber placed in 80mm long hemispheric cavity. As an output coupler was used concave mirror (r = 150mm) with reflectivity 98% on lasing wavelength. Giant pulses were obtained with both passive Q-switches. When V:YAG saturable absorber was used, 55 ns long (FWHM) pulses were generated with peak power 0.47kW (pulse energy 26 &mgr;J). Using Co:MALO, more powerful pulses were obtained (40 ns long, 1.0kW peak power, 45 &mgr;J energy). Advantage of less efficient V:YAG consist in possibility of diffusion bonding between Q-switch and laser active medium which allows to prepare miniature compact laser device. This concept was demonstrated by using of Nd:YAG/V:YAG monolith crystal (4mm long undoped YAG part, 8mm long Nd:YAG part, 0.5mm long V:YAG part - initial transmission 97% @ 1444 nm). This monolithic crystal, originally designed for 1338nm lasing, was placed into 23mm long cavity resonating at wavelength 1444 nm. For output coupler reflectivity 96% pulses 39 ns long with peak power 0.64kW were generated at wavelength 1444 nm.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jan Šulc, Pavel Arátor, Helena Jelínková, Karel Nejezchleb, Václav Škoda, "1.44-&mgr;m giant pulse generation", Proc. SPIE 6451, Solid State Lasers XVI: Technology and Devices, 64511H (9 March 2007); doi: 10.1117/12.717104; https://doi.org/10.1117/12.717104


A single frequency double pulse Ho YLF laser for CO2...
Proceedings of SPIE (March 16 2016)
Double-clad planar waveguide Nd:YAG laser
Proceedings of SPIE (November 18 2008)
Defects in a bulk GaAs and Q switching of a...
Proceedings of SPIE (February 07 2011)
Diode-laser-array-pumped Nd:YAG thin slab laser
Proceedings of SPIE (December 04 1998)
V YAG saturable absorber for flash lamp and diode pumped...
Proceedings of SPIE (September 01 2004)

Back to Top