Application of polarimetric technique for determining the sign of quadratic electro-optic coefficients in crystals

Izdebski, Marek; Kucharczyk, W.

doi:10.1364/josab.34.002281

Cited by 6 publications

(9 citation statements)

References 11 publications

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“…If this condition is not met, an additional crystal can be used to shift the operating point on the modulator characteristic. An example of such a measurement is shown in [17], where the configuration with the light being sent along the optical axis of uniaxial crystal was taken into account. This approach (with or without an additional crystal) cannot be used for samples exhibiting significant dichroism or natural optical activity.…”

Section: Discussionmentioning

confidence: 99%

“…Its sensitivity allows for QEOE measurements in paraelectric crystals and ferroelectrics at temperatures significantly different from the phase transition temperature, where the effect is relatively small. In combination with the procedure described earlier [17], the technique allows to determine the sign of the measured QEOE coefficients. This approach can also be used in the usually relatively easier LEOE measurements.…”

Section: Discussionmentioning

confidence: 99%

“…We used the changing position of the modulator operating point on the characteristic of its transmission [ 10 , 14 ]. Recently, such a dynamic polarimetric method has been used to determine the sign of the QEOE coefficients [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Precise Method for Measuring the Quadratic Electro-Optic Effect in Noncentrosymmetric Crystals in the Presence of Natural Birefringence

Izdebski

Kucharczyk

2020

Materials

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The application of the improved dynamic polarimetric method for the measurement of the quadratic electro-optic effect in NH4H2PO4 (ADP) crystal with the light beam propagating perpendicularly to its optical axis is presented. This technique can be applied in noncetrosymmetric crystals in the presence of natural birefringence even when the fast and slow rays diverge slightly, causing them to only partially interfere. The method allows for minor errors in cutting and orientation of the crystal samples, resulting in deviations from configurations in which the crystal symmetry vetoes the linear electro-optic effect. The occurring contribution of the linear effect, if it is not too large, not only does not exclude the measurement of the quadratic effect, but increases its accuracy. The method does not require any prior compensation for the natural birefringence. Its sensitivity allows for quadratic electro-optic effect measurements in ferroelectrics in temperatures significantly different from the phase transition temperature or in paraelectric crystals, for which this effect is relatively small.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Precise Method for Measuring the Quadratic Electro-Optic Effect in Noncentrosymmetric Crystals in the Presence of Natural Birefringence

Izdebski

Kucharczyk

2020

Materials

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“…EO coefficients are quantitative parameters of the EO effect, their accurate measurements are the key for designing these EO devices, and a study on the dispersion of the EO coefficients is of great significance for designing the EO devices that are suitable for wide spectrum applications [7][8][9][10]. Furthermore, the accurate measurements of the EO coefficients and their dispersion are also very significant to develop new EO materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Further, all the aforementioned methods are time-consuming, generally in the order of minutes. Although N. Shota, M. Izdebski, and S. H. Lee et al have done significant work on improving the measurement method of the EO coefficients, it is still necessary to study a new method for fast, highly accurate, and sensitive measurements of the dispersion of the EO coefficients [11,12,18].…”

Section: Introductionmentioning

confidence: 99%

Dispersion Measurement of Electro-Optic Coefficient γ22 of Lithium Niobate Based on Photoelastic Modulation

Wang

Han

et al. 2020

Applied Sciences

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A novel method for determining the electro-optic (EO) coefficient γ 22 of lithium niobate and its dispersion using photoelastic modulation is presented. A spectroscopic polarimetry was constructed with the photoelastic modulator (PEM), and a monochromator was selected to automatically scan the wavelength of a light source. Phase retardation induced by an EO sample was loaded into the modulation signals to demodulate the EO coefficients. The PEM and data processing were controlled in the same field programmable gate array (FPGA), and the DC and harmonic terms were extracted simultaneously by employing digital phase-locked technology. An experimental system was built to analyze the principle of this scheme in detail. After the modulation phase retardation amplitude of the PEM was precisely calibrated, the EO coefficient γ 22 of a Y-cut lithium niobate crystal plate was measured in the spectral range from 0.42 to 0.8 µm. The experimental results demonstrated that the measurement sensitivity of the system was 1.1 × 10 − 14 m / V for a sampling time of 198.9 ms. Plotting the measured results against the light wavelength, the dispersion of the EO coefficients was obtained similar to the Cauchy dispersion formula γ 22 = 5.31 × 10 − 12 + 4.071 × 10 − 13 λ 2 + 7.184 × 10 − 14 λ 4 in the visible light range. This method is suitable for studying dispersion of the EO coefficients of crystals as well as of thin films and two-dimensional materials.

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Experimental verification of electro-optical effect in LBO crystal based on nonlinear optical process

Han

Zhan

Zhang

et al. 2022

Optik

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Application of polarimetric technique for determining the sign of quadratic electro-optic coefficients in crystals

Cited by 6 publications

References 11 publications

Precise Method for Measuring the Quadratic Electro-Optic Effect in Noncentrosymmetric Crystals in the Presence of Natural Birefringence

Precise Method for Measuring the Quadratic Electro-Optic Effect in Noncentrosymmetric Crystals in the Presence of Natural Birefringence

Dispersion Measurement of Electro-Optic Coefficient γ22 of Lithium Niobate Based on Photoelastic Modulation

Experimental verification of electro-optical effect in LBO crystal based on nonlinear optical process

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