Benjamin Maingot, Elizaveta Neradovskaia, Cyrille Claudet, Nicolas Forget, and Aurélie Jullien, "Measurement of nonlinear refractive indices of bulk and liquid crystals by nonlinear chirped interferometry," Opt. Lett. 48, 3243-3246 (2023)
The nonlinear refractive indices (n2) of a selection of bulk (LiB3O5, KTiOAsO4, MgO:LiNbO3, LiGaS2, ZnSe) and liquid (E7, MLC2132) crystals are measured at 1030 nm in the sub-picosecond regime (200 fs) by nonlinear chirped interferometry. The reported values provide key parameters for the design of near- to mid-infrared parametric sources, as well as all-optical delay lines.
Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.
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Polarization Configurations and Measured Components of Tensora
Polarization Configuration
Pump
Probe
Ref.
term
(i)
(ii)
(iii)
(iv)
$x$ refers to the extraordinary axis (for a birefringent medium).
Table 2.
Linear Refractive Index Values from Pietro and Jullien [21] and Measured Nonlinear Index Values () for Nematic E7 and MLC2132, for nma
LC Sample
E7
1.70
1.51
MLC2132
1.72
1.49
The reference sample is fused silica.
Table 3.
Measured Values of Some Terms of Tensor for MLC2132 and E7 Mixturesa
Mixture
term
value
(mrad)
MLC2132
105
20
9
18
E7
40
5
15
12
Values are relative to that of fused silica [$\chi _{0}=(2.0\pm 0.2)\,10^{-22}\,\text {m}^{2}/\text {V}^2$ [24]]. $x$ refers to the extraordinary axis of the LC cells. The last column gives the calculated experimental nonlinear phase in the LC layer.
Table 4.
Measured Nonlinear Refractive Indices of LBO, KTA, MLN, LGS, and ZnSe at 1030 nm for 200-fs Pulsesa
For birefringent crystals, values are given for the fast axis (low index, lo) or the slow axis (high index, hi): $\theta$, $\phi$, polar crystallographic orientation; $L$, crystal length. All values from literature were measured near 1030 nm with sub-ps pulses, except MgO:LN and LBO, for which the reported values at 800 nm were rescaled (*) to 1030 nm as described by Bache and Schiek [25] and references therein. Reference sample, sapphire.
Tables (4)
Table 1.
Polarization Configurations and Measured Components of Tensora
Polarization Configuration
Pump
Probe
Ref.
term
(i)
(ii)
(iii)
(iv)
$x$ refers to the extraordinary axis (for a birefringent medium).
Table 2.
Linear Refractive Index Values from Pietro and Jullien [21] and Measured Nonlinear Index Values () for Nematic E7 and MLC2132, for nma
LC Sample
E7
1.70
1.51
MLC2132
1.72
1.49
The reference sample is fused silica.
Table 3.
Measured Values of Some Terms of Tensor for MLC2132 and E7 Mixturesa
Mixture
term
value
(mrad)
MLC2132
105
20
9
18
E7
40
5
15
12
Values are relative to that of fused silica [$\chi _{0}=(2.0\pm 0.2)\,10^{-22}\,\text {m}^{2}/\text {V}^2$ [24]]. $x$ refers to the extraordinary axis of the LC cells. The last column gives the calculated experimental nonlinear phase in the LC layer.
Table 4.
Measured Nonlinear Refractive Indices of LBO, KTA, MLN, LGS, and ZnSe at 1030 nm for 200-fs Pulsesa
For birefringent crystals, values are given for the fast axis (low index, lo) or the slow axis (high index, hi): $\theta$, $\phi$, polar crystallographic orientation; $L$, crystal length. All values from literature were measured near 1030 nm with sub-ps pulses, except MgO:LN and LBO, for which the reported values at 800 nm were rescaled (*) to 1030 nm as described by Bache and Schiek [25] and references therein. Reference sample, sapphire.
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