In order to enhance the laser performances, solid-state samples based on polymethyl methacrylate (PMMA) co-doped with pyrromethene 597 (PM597) and pyrromethene 650 (PM650) were prepared. With SHG of Q-switched Nd:YAG laser (532 nm, similar to 15 ns) pumping the samples, laser emission from the mixtures of PM597 and PM650 both in liquid solution and incorporated into solid polymeric matrices were investigated. The highest slope efficiency of co-doped solid-state dye samples 30.8% was achieved. Through the dye PM650 being co-doped into the dye PM597, the dye laser output wavelength was extended for the existence of energy transfer from the dye PM597 to the dye PM650.
机构:
KCG Coll Technol, Dept Phys, Madras 600097, Tamil Nadu, India
Bharathiar Univ, Res Ctr, Coimbatore 641046, Tamil Nadu, IndiaKCG Coll Technol, Dept Phys, Madras 600097, Tamil Nadu, India
Mani, R. G. Geethu
Ahamed, M. Basheer
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BS Abdur Rahman Univ, Dept Phys, Madras 600048, Tamil Nadu, IndiaKCG Coll Technol, Dept Phys, Madras 600097, Tamil Nadu, India