High-power 266 nm laser generation with a NaSrBeBOF crystal.

We demonstrate a 266 nm ultraviolet (UV) picosecond laser by fourth-harmonic generation of a Nd:YAG laser with a 5.4 mm thick NaSrBeBOF (NSBBF) crystal. A maximum output power exceeding 1 W at 266 nm was obtained (the highest output power being 1.

Deep-Ultraviolet Nonlinear Optical Crystal Cs Al (B O ) O: A Benign Member of the Sr Be (BO ) O Family with [Al (B O ) O] Double Layers.

For the explorations of deep ultraviolet (DUV) nonlinear optical (NLO) borates, a type of important optoelectronic material, the (BO ) group has been long regarded as the sole microscopic optically-active unit, and toxic Be-containing raw materials are frequently-adopted. Herein, a new DUV NLO crystal, Cs Al (B O ) O (CABO), was designed and synthesized by simultaneously replacing the (BO ) groups and Be cations for (B O ) units and Al cations in Sr Be (BO ) O, which possesses a favorable structure, through a chemical co-substitution approach. CABO exhibits a considerable DUV NLO capability because of the wide band gap and large birefringence originating from the [Al (B O ) O] double layers.

High-efficiency UV generation at 266 nm in a new nonlinear optical crystal NaSrBeBOF.

266 nm laser output in NaSrBeBOF crystal by the fourth harmonic generation process with a picosecond mode-locked Nd-based YAG laser has been done for the first time. When the input pumping energy was 870 μJ at 532 nm, a 280 μJ 266 nm UV laser was obtained and the corresponding conversion efficiency was 35.9%.

High average power third harmonic generation at 355 nm with KBOBr crystal.

We demonstrate a nanosecond 355 nm laser by third harmonic generation of an Nd: YAG laser with a 4 × 4 × 13.3 mm type I cut KBOBr crystal for the first time. The maximum average power of 19.