Titanium Sapphire laser Presentation Photon Physics Ruben van

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

Characteristics Tunable solid-state laser n Al 2 O 3 Ti 2 O 3 (0, 1 m% Ti) n Absorption (pumping) wavelength 400 600 nm n Emission (lasing) wavelength 660 - 1180 nm n CW pumped with argon ion laser n Pulsed pumped with Nd: YAG/Nd: YLF n

Energy levels/transitions

Output power n Use the equations given in Silfvast n A = 10 mm 2, g 0 = 20 m-1, a = 0. 5%, σul = 3. 4 · 10 -23 m 2, one highly reflecting mirror n Isat = n n n (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 k. W

Applications n Laser assisted micro-injection of exogeneous substances into living cells[1] n Production of nanoholes[2] n Infrared spectroscopy of semiconductors n 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), p [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] n Accelerated bone repair after corticotomy with Ti: S laser Accurate controlled removal of tissue n Less damage to surrounding tissue n Bone heals faster n [3] Leucht, P. , et al. , Accelerated Bone Repair After Plasma Laser Corticotomies, Annals of Surgery, Volume: 246, Issue: 1 (July 1, 2007), pp: 140 -

Thank you!