Dye Laser Pumped by a Second Harmonic of a Nd:YAG Laser

Please enable javascript in your browser.

Rahbari, Mohammad | 2013

829 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45304 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Sedighi Bonabi, Rasoul
Abstract:
The aim ofthis work is constructing a dye laser pumped in visible spectrum by a second harmonic of aNd:YAG laser.For this purpose, 12mJ of its energy focused by a cylendrical lens into a dye cell. Instead of usual telescope, making aberration in two dimensions, we have used multi prism beam expander to eliminate aberration and also expand beam beyond 10 times. The more magnification resulted in narrowing laser linewidth and it was about 2 nm for two prism beam expander and 0.5 nm for four prism beam expander.
Beam expander configurations were designed in zero dispersioncondition.Therefore,scanning laser spectrum becomes possible. The wavelength was scanned between 565 nm to595 nm, and ASE was observed in domain of the 570-575nm.In the obtainedpeak power at 580 nm, the estimated energy conversion was about 20%. This gives the peak of energy of almost 2mJ
Keywords:
Dye Lasers ; Multiprism Beam Expander ; A Second Harmonic of a YAG Laser ; Zero Dispersion ; Scanning Wavelength ; Rhodamine 6G

No TOC