Titanium: Sapphire laser Presentation Photon Physics Ruben van der Wel 09-04-2009

Characteristics Tunable solid-state laser Al2O3  Ti2O3 (0,1m% Ti) Absorption (pumping) wavelength 400 - 600 nm Emission (lasing) wavelength 660 - 1180 nm CW pumped with argon ion laser Pulsed pumped with Nd:YAG/Nd:YLF

Energy levels/transitions

Output power A = 10 mm2, g0 = 20 m-1, a = 0.5%, Use the equations given in Silfvast A = 10 mm2, g0 = 20 m-1, a = 0.5%, σul = 3.4 · 10-23 m2, one highly reflecting mirror Isat = (1.3 – 2.3) · 109 W m-2 topt = 2 x 0.095 Itopt = (1.2 – 2.1) · 109 W m-2 Ptopt = 2 x (1.2 – 2.1) · 104 W = 24 – 42 kW

Applications Laser assisted micro-injection of exogeneous substances into living cells[1] Production of nanoholes[2] Infrared spectroscopy of semiconductors Laser radar [1] Lei, M.,et al, Femtosecond laser-assisted microinjection into living neurons, Journal of Neuroscience Methods, Volume: 174, Issue: 2 (September 30, 2008), pp: 215-218 [2] N.N. Nedyalkov, T. Miyanishi, M. Obara, Enhanced near field mediated nanohole fabrication on silicon substrate by femtosecond laser pulse, Applied Surface Science, Volume: 253, Issue: 15 (May 30, 2007), pp: 6558-6562

Recent experiment[3] Accelerated bone repair after corticotomy with Ti:S laser Accurate controlled removal of tissue Less damage to surrounding tissue Bone heals faster [3] Leucht, P., et al. , Accelerated Bone Repair After Plasma Laser Corticotomies, Annals of Surgery, Volume: 246, Issue: 1 (July 1, 2007), pp: 140-150

Thank you!