266 nm ultraviolet light generation in Ga-doped BaAlBOF crystals.

BaAlBOF (BABF) crystals are a recently developed and promising nonlinear optical material, notably for the third harmonic generation of ultraviolet (UV) light at 355 nm. However, the fourth harmonic generation of UV light at 266 nm has never been obtained by using a BABF crystal due to its relatively small birefringence. We demonstrate that the birefringence of BABF can be effectively increased by doping it with Ga.

ReBe2B5O11 (Re = Y, Gd): rare-earth beryllium borates as deep-ultraviolet nonlinear-optical materials.

Two novel rare-earth beryllium borates ReBe2B5O11 (Re = Y, Gd) have been discovered. These materials possess a unique structural feature with a platelike infinite ∞(2)[Be2B5O11]3– superlayer, which is first found in beryllium borates. The superlayer can be seen as sandwich-shaped with ∞(1)[B4O8]4– chains linking up with a ∞(2)[Be2BO5]3– sublayer above and below via the B–O–Be bond.

High-energy noncollinear optical parametric-chirped pulse amplification in LBO at 800 nm.

The optical parametric-chirped pulse amplification (OPCPA) based on large-aperture nonlinear optical crystals is promising for implementation of an ultrahigh peak-power laser system of 10 PW and beyond. We demonstrated the highest energy broadband OPCPA at 800 nm, to the best of our knowledge, by using an 80 mm in diameter LiB(3)O(5)(LBO) amplifier, with an output energy of 28.68 J, a bandwidth of 80 nm (FWHM), and conversion efficiency of 25.

Bi2(IO4)(IO3)3: a new potential infrared nonlinear optical material containing [IO4](3-) anion.

A new potential infrared (IR) nonlinear optical (NLO) material Bi(2)(IO(4))(IO(3))(3) was synthesized by hydrothermal method. Bi(2)(IO(4))(IO(3))(3) crystallizes in the chiral orthorhombic space group P2(1)2(1)2(1) (No. 19) with a = 5.

Nonlinear optical properties ofBaAlBO3F2 crystal.

We investigated the nonlinear optical properties of new BaAlBO(3)F(2)(BABF) crystal. The high quality BABF is nonhygroscopic and possesses a moderate birefringence suitable for UV light generation. On the basis of its refractive index dispersion curves, it is inferred that BABF has great potential applications nonlinear optical material, notably for UV light generation at 355 nm.

High-efficiency 355 nm generation in barium aluminum borate diflouride (BaAlBO3F2).

We demonstrate high-efficiency ultraviolet (UV) laser generation in a nonlinear optical crystal BaAlBO3F2 (BABF); 355 nm UV light was generated by using a type I BABF crystal as a sum-frequency mixing of the fundamental light and the second harmonic from a picosecond Nd:YAG laser operated at a repetition rate of 10 Hz with a pulse duration of 20 ps. An output of 0.635 mJ for the third harmonic was obtained.