A Powder Technique for the Evaluation of Nonlinear Optical Materials

Abstract

An experimental technique using powders is described which permits the rapid classification of materials according to (a) magnitude of nonlinear optical coefficients relative to a crystalline quartz standard and (b) existence or absence of phase matching direction(s) for second-harmonic generation. Results are presented for a large number of inorganic and organic substances including single-crystal data on phase-matched second-harmonic generation in HIO3, KNbO3, PbTiO3, LiClO4·3H2O, and CO(NH2)2. Iodic acid (HIO3) has a nonlinear coefficient d14∼1.5×d31 LiNbO3. Since it is readily grown from water solution and does not exhibit optical damage effects, this material should be useful for nonlinear device applications.

Characterization of New Infrared Nonlinear Optical Material with High Laser Damage Threshold, Li2Ga2GeS6

“…When the Li 2 Ga 2 GeS 6 was probed by 1.064 µm radiations of the Nd: YAG laser, a strong SHG signal at 0.532 µm was observed, indicating that the incoming 1.064 µm photons are efficiently up-converted to 0.532 µm radiation through the Li 2 Ga 2 GeS 6 . The SHG signal dependence of the particle-size of NLO materials has been shown to be a signature of the phasematching condition in NLO crystals 27,28 the SHG efficiency increases with the particle size and is saturated at a maximum value in the phase-matching condition. From our measurement, Figure 5, we see that the SHG signal from the We have not observed any degradation in the SHG signal for the Li 2 Ga 2 GeS 6 under prolonged laser irradiations as evidenced by the continued strong production of 0.532 µm light.…”

“…The secondorder nonlinearity of the powder sample of Li 2 Ga 2 GeS 6 was examined using a modified Kurtz-NLO system with a 1.064 µm Nd:YAG laser. 27 Polycrystalline Li 2 Ga 2 GeS 6 was ground and sieved into distinct particle size ranges, <20, 20-45, 45-63, 63-75, 75-90, and 90-125 µm. They were placed in separate capillary tubes.…”

Growth, structural, optical, thermal and mechanical properties of ammonium pentaborate single crystal

“…Kurtz [12] second harmonic generation (SHG) test was performed to find the NLO property of APB crystal. The powdered crystal was illuminated using Spectra Physics Quanta Ray S2.…”

Investigation on nonlinear optical and dielectric properties of L-arginine doped ZTC crystal to explore photonic device applications

“…The Kurtz-Perry powder SHG test is a decisive technique to determine the second order conversion efficiency of given material [15]. For present analysis, the single KDP and LA-ZTC crystals were powdered to micro-granules of even grain size and tightly packed in a quartz cavity.…”