Efficient PPF-αNPO Energy Transfer Dye Laser in Ultraviolet Region

Efficient energy transfer dye laser (ETDL) in the near ultraviolet region was performed in PPF-αNPO dye mixtures pumped by a N 2 laser. As the PPF concentration increases, the sensitized αNPO laser power increases remarkably and its lasing wavelength largely shifts towards a shorter wavelength compared to an unsensitized system. An improved tunable range realized by this mixture system is also demonstrated.