Electro-optic coefficients of lithium tantalate at near-infrared wavelengths

Joanna L. Casson; Kevin T. Gahagan; David A. Scrymgeour; Ravinder K. Jain; Jeanne M. Robinson; Venkatraman Gopalan; Robert K. Sander

doi:10.1364/JOSAB.21.001948

Journal of the Optical Society of America B
Vol. 21,
Issue 11,
pp. 1948-1952
(2004)
•https://doi.org/10.1364/JOSAB.21.001948

Electro-optic coefficients of lithium tantalate at near-infrared wavelengths

Joanna L. Casson, Kevin T. Gahagan, David A. Scrymgeour, Ravinder K. Jain, Jeanne M. Robinson, Venkatraman Gopalan, and Robert K. Sander

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Joanna L. Casson, Kevin T. Gahagan, David A. Scrymgeour, Ravinder K. Jain, Jeanne M. Robinson, Venkatraman Gopalan, and Robert K. Sander, "Electro-optic coefficients of lithium tantalate at near-infrared wavelengths," J. Opt. Soc. Am. B 21, 1948-1952 (2004)

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Abstract

The unclamped linear electro-optic coefficients $r_{13}$ and $r_{33}$ for lithium tantalate are known at only one wavelength, 632.8 nm, whereas the clamped coefficients are also known at 3.39 µm. In the unclamped mode the effects of mechanical changes caused by piezoelectric and elasto-optic effects are accounted for in the electro-optic coefficient. We demonstrate a novel technique that uses a ferroelectric domain micropatterned electro-optic deflector to measure the unclamped linear electro-optic coefficients $r_{13}$ and $r_{33}$ at any wavelength. Using this method, we have determined these values for lithium tantalate at 980, 1330, and 1558 nm.

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Wavelength (nm)	$r_{33} (pm / V)$	$r_{13} (pm / V)$	Mode	Reference
632.8	30.5	8.4	Unclamped	6
632.8	30.3	5.7	Unclamped	7
632.8	30.3	7	Clamped	8
3.39	27	4.5	Clamped	9

Wavelength (nm)	Extraordinary Polarization			Ordinary Polarization
Wavelength (nm)	Curvature-Adjusted Deflection (mrad/kV)	Index of Refraction, $n_{e}$	$r_{33} (pm / V)$	Curvature-Adjusted Deflection (mrad/kV)	Index of Refraction, $n_{o}$	$r_{13} (pm / V)$
632.8	$32.9 \pm 0.2$	2.1809	$30.5 \pm 0.3$	$8.17 \pm 0.03$	2.1763	$7.62 \pm 0.08$
980	$30.3 \pm 0.2$	2.1443	$29.6 \pm 0.3$	$7.10 \pm 0.03$	2.1402	$6.96 \pm 0.07$
1330	$27.8 \pm 0.1$	2.1296	$27.7 \pm 0.3$	$6.55 \pm 0.03$	2.1259	$6.55 \pm 0.07$
1558	$27.2 \pm 0.1$	2.1224	$27.4 \pm 0.3$	$6.84 \pm 0.04$	2.1186	$6.92 \pm 0.07$

Wavelength (nm)	$r_{33} (pm / V)$	$r_{13} (pm / V)$	Mode	Reference
632.8	30.5	8.4	Unclamped	6
632.8	30.3	5.7	Unclamped	7
632.8	30.3	7	Clamped	8
3.39	27	4.5	Clamped	9

Wavelength (nm)	Extraordinary Polarization			Ordinary Polarization
Wavelength (nm)	Curvature-Adjusted Deflection (mrad/kV)	Index of Refraction, $n_{e}$	$r_{33} (pm / V)$	Curvature-Adjusted Deflection (mrad/kV)	Index of Refraction, $n_{o}$	$r_{13} (pm / V)$
632.8	$32.9 \pm 0.2$	2.1809	$30.5 \pm 0.3$	$8.17 \pm 0.03$	2.1763	$7.62 \pm 0.08$
980	$30.3 \pm 0.2$	2.1443	$29.6 \pm 0.3$	$7.10 \pm 0.03$	2.1402	$6.96 \pm 0.07$
1330	$27.8 \pm 0.1$	2.1296	$27.7 \pm 0.3$	$6.55 \pm 0.03$	2.1259	$6.55 \pm 0.07$
1558	$27.2 \pm 0.1$	2.1224	$27.4 \pm 0.3$	$6.84 \pm 0.04$	2.1186	$6.92 \pm 0.07$

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Journal of the Optical Society of America B