|Laser Turns 50 (episode 2)
Second Symposium on Lasers
Sponsors and Collaborators:
Emerging Nations Science Foundation
Registration: Registration is required.
Date: September 10, 2011
Time: 10:30 am
Venue: New Auditorium, National University of Computer and Emerging Sciences (FAST-NU), Faisal Town, Lahore
Let there be Light: An Overview of Solid-State Laser Technology (Dr. Tayyab Imran)
From Theodore Maiman’s small ruby laser to ultrafast Ti: Sapphire laser technology, a solid-state laser technology revolution, earning important roles in scientific research, engineering, medicine, materials working, and a host of other applications.
The Use of Lasers in Opthalmology (Dr. Nadeem H. Butt)
Laser-Assisted Pump-probe Studies of Atoms (Dr. Aslam Baig)
Laser-assisted spectroscopic techniques have been exploited to study the highly excited states of atoms; a pump-probe experiment. In this technique, at least two dye lasers are required; the first dye laser serves as an exciting laser whereas the second laser serves as an ionizing laser. A Nd:YAG laser SHG (533nm, 500 mJ) and THG (355 nm, 200 mJ) is used to pump the TDL-90 dye laser (line width »0.08 cm-1) and locally fabricated dye lasers (line width »0.25 cm-1) for multi-step or multi-photon excitation/ ionization of atoms. The ions are detected either in a thermionic diode ion detector or in an atomic beam apparatus. We have also utilized the polarization properties of the laser beams to measure the photoionization cross-sections of the excited states of atoms. A few examples of the spectra will be presented in addition to the latest experimental results on the photoionization of atoms from the Free Electron Laser Source (FLASH).
Dr. Aslam Baig
Department of Physics, Quaid-e-Azam University, Islamabad
Dr. Tayyab Imran
School of Science and Engineering, LUMS, Lahore
Vice Principal, Farooqi Girls High School, Lahore