Abstract
Using the wedge technique we have directly compared the second-order nonlinear susceptibilities of infrared and visible nonlinear crystals. The measured nonlinear coefficient ratios at 2.12 μm relative to are: for , 4.53 ± 4.3; , 12.1 ± 1.7; , 26.9 ± 2.1; , 10.5 ± 1.2; , 10.2 ± 1.2. The measured ratios at 1.318 μm relative to are: for , 0.990 ± 0.05; , 0.870 ± 0.07; , 4.66 ± 0.56; , 0.088 ± 0.01; , 12.0 ± 1.2. We have used the parametric fluorescence method to accurately measure the absolute second-order susceptibility of and at 4880 and 5145 Å. Our recommended values for and m/V agree very well with previous independent absolute measurements. By scaling the nonlinear susceptibilities through the relatively dispersionless Miller's and using the wedge ratio results, we have, for the first time, established a uniform scale of nonlinear susceptibility values relative to that extends from 0.488 to 10.6 μm in the infrared.
- Received 8 December 1975
DOI:https://doi.org/10.1103/PhysRevB.14.1693
©1976 American Physical Society