Ultraviolet Laser Material Research Articles

Micro-pulling down method-grown Er3+:LiCaAlF6 as prospective vacuum ultraviolet laser material

We report the successful growth of trivalent erbium-doped lithium calcium aluminum fluoride (Er 3+ :LiCaAlF 6 ) using the micro-pulling down method. Several absorption bands were observed at 139 nm (71,942 cm −1 ), 149 nm (67,114 cm −1 ), and 162 nm (61,728 cm −1 ), which can be ascribed to 4 f →5 d transitions in Er 3+ . Evaluation of its optical properties using the 157-nm emission of a F 2 laser reveal that it has a 163-nm vacuum ultraviolet fluorescence with 1.3-μs decay time, involving a transition originating from the high-spin state of the 4 f 10 5 d excited state configuration. This is one of the shortest emission wavelengths from solid-state materials reported at room temperature. ► Er 3+ :LiCaAlF 6 was successfully grown using the micro-pulling down method. ► Absorption bands at 139 nm, 149 nm, and 162 nm, which are ascribed to 4 f →5 d transitions in Er 3+ , were observed. ► 163-nm vacuum ultraviolet fluorescence with 1.3-μs decay time is explained to involve a transition from a high-spin state. ► This is one of the shortest emission wavelengths from solid-state materials reported at room temperature.

Er:LiCAF as Potential Vacuum Ultraviolet Laser Material at 163 nm

We report the vacuum ultraviolet luminescence characteristics of a micro-pulling down method grown Er3+:LiCaAlF6. Emission at 163 nm with a lifetime of 1.3-μs observed with F2 laser (157-nm) pumping. This is one of the shortest emission wavelengths reported from a rare-earth doped fluoride at room temperature.

Optical Properties of Micro-Pulling Down Method Grown Nd3+:(La1-x,Bax)F3-x as Potential Vacuum Ultraviolet Laser Material and Scintillator

The optical properties of Nd3+:LaF3 and Nd3+:(La1-x,Bax)F3-x (x=0.1) crystals, which were efficiently grown by the micro-pulling down method, were investigated using a vacuum ultraviolet spectrum-resolved streak camera system. The fluorescence of the Nd3+:LaF3 crystal is centered at 174 nm with a full width at half maximum of 8 nm and a lifetime of 8.9 ns. On the other hand, the fluorescence of the Nd3+:(La1-x,Bax)F3-x (x=0.1) crystal is centered at 180 nm with a full width at half maximum of 12 nm and a lifetime of 6.1 ns. Since the (La1-x,Bax)F3-x (x=0.1) host is transparent in the vacuum ultraviolet region having a transmission edge at 160 nm, it is proposed that Nd3+:(La1-x,Bax)F3-x (x=0.1) is suitable as a vacuum ultraviolet scintillator and as a potential laser material.

Spectroscopic analogy approach in selective search for new Ce3+-activated all-solid-state tunable ultraviolet laser materials

Recent progress made with Ce3+-activated materials offers numerous advantages with respect to other traditional sources of tunable ultraviolet (UV) radiation; so there is a strong incentive for further aimed searches for new Ce3+-activated materials capable of lasing with wider continuous UV tunability using all-solid-state direct UV pumping. Here we report the spectro-scopic analogy approach for further aimed searches derived from the analysis of known laser materials. We also report the results of our test investigation, based on the suggested approach, where Ce3+-activated SrAlF5 is spectroscopically characterized as a promising all-solid-state tunable UV laser material which can be efficiently pumped by a quadrupled Nd laser.

Letter Spectroscopic analogy approach in selective search for new Ce 3+ -activated all-solid-state tunable ultraviolet laser materials

Letter Spectroscopic analogy approach in selective search for new Ce 3+ -activated all-solid-state tunable ultraviolet laser materials

The role of excited species in ultraviolet-laser materials ablation III. Non-stationary ablation of organic polymers

The role of excited species in ultraviolet-laser materials ablation III. Non-stationary ablation of organic polymers

Tunable Ultraviolet Laser Materials and Their Applications to Ultrafast Laser Sources.

Tunable Ultraviolet Laser Materials and Their Applications to Ultrafast Laser Sources.