Refractive index database

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Optical constants of LiIO3 (Lithium iodate)
Umegaki et al. 1971: n(o) 0.4–5.7 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]


Conditions & Spec sheet

n_is_absolute: false
wavelength_is_vacuum: false


Room temperature. Ordinary ray (o).


1) S. Umegaki, S.-I. Tanaka, T. Uchiyama, S. Yabumoto. Refractive indices of lithium iodate between 0.4 and 2.2 μ, Opt. Commun. 3, 244-245 (1971).
2) V. I. Kabelka, A. S. Piskarskas, A. Y. Stabinis, R. L. Sher. Group matching of interacting light pulses in nonlinear crystals, Sov. J. Quant. Electron. 5, 255-256 (1975).
3) K. Kato. High-power difference-frequency generation at 4.4-5.7 µm in LiIO3, IEEE. J. Quant. Electron. 21, 119-120 (1985).
* Reference 2 presented a dispersion formula based on tabulated data from Reference 1. The formula was further refined and its accuracy was confirmed in Reference 3, which extended the range of validity.


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Lithium iodate, LiIO3

Lithium iodate (LiIO3) is a white crystalline compound that has nonlinear optical properties, making it useful in certain optical applications such as frequency conversion and electro-optical modulation. Due to its good phase-matching capabilities, it is often employed in second harmonic generation (SHG) and other nonlinear optical processes. Lithium iodate is also characterized by its relatively high damage threshold, which makes it suitable for high-power optical systems. However, the compound is sensitive to moisture and must be handled and stored under controlled conditions to maintain its optical characteristics.

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