Comparison of diode-side-pumped Nd:YAG and Nd:YAP laser-
Jan Sulca, Helena Jelínková, Jan K. Jabczy nski Waldemar Z_ endzianb, Jacek Kwiatkowskb, Karel Nejezchleb, Václav skoda- Czech Technical University, Faculty of Nuclear Sciences and Physical Engineering- Military University of Technology, Institute of Optoelectronics
Nd:YAG and Nd:YAP slab crystal in the form of triangle with the Brewster-angle-cut polished input faces was used as an active medium for diode-side-pumped laser. A horizontal projection of the active medium form is a triangle with 19.22mm long base, 5mm height, and thickness of 4 mm. This active crystal shape is one from the simplest form which makes possible to realise a slab side-pumped con guration with a total internal re ection. Optical pumping was accomplished by a quasi-cw diode ARR18P400 with peak power 400W closely attached to the active crystal without any coupling optics. Both material were operated for most known Nd3+ ion transition 4F3=2 ! 4I11=2 (1 ¹m) as well as for transition 4F3=2 ! 4I13=2 which leads to the emission at 1.3 ¹m. The systems were tested in free running and Q switch regime. This system is enough compact to be useful tools for direct medical application.
Spectrum of free-running Nd:YAG laser emission corresponding to operation at Nd3+ transition 4F3=2 ! 4I13=2 and Spectrum of free-running Nd:YAP laser emission corresponding to operation at Nd3+ transition 4F3=2 ! 4I13=2.
