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

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 m. In the unclamped mode the effects of mechanical changes caused by piezoelectric and elasto-optic effects are accounted for in the electrooptic coefficient. We demonstrate a novel technique that uses a ferroelectric domain micropatterned electrooptic 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.

Optimization of laser dynamics for active stabilization of DF-VECSELs dedicated to cesium CPT clocks

“…In the case where the x and y modes have similar parameters (pumping ratios, photon lifetimes, ratios of cross-toself saturation coefficients, and RINs), one has K ij ∼ 1/2 for large loop gains and low noise frequencies. For independent x and y modes (Θ xy 0), (18) shows that reducing the intensity noise based on detection of the total intensity reduces the noise of each mode by 3 dB. This equation also shows that in-phase correlation of the mode noises allows an efficient reduction of the intensity noises of both modes whereas in the case anti-phase correlations, closing the loop leaves the noise unchanged.…”

Recent Advances in the Design of Electro-Optic Sensors for Minimally Destructive Microwave Field Probing

“…The period of the fringes is determined by the phase delay term exp ( δ ( E,λ )) which is significantly affected by polarization and light wavelength. We use a ∼1.55-μm-wavelength distributed feedback (DFB) laser diode, and the known birefringence parameters of the LiTaO 3 crystal at 1558 nm are n e = 2.1224, n o = 2.1186, r 33 = 27.4 (pm/V), and r 13 = 6.92 (pm/V) [21]. When a linear beam polarization is set along one of the refractive indices ( n e or n o ) of the LiTaO 3 , the dominant reflected beam components are r 1 + Ct 1 2 r 2 exp ( δ o,e ( E,λ )) (we ignore multi-round trip terms in the crystal, as the first two reflections are dominant).…”

Simple optical transformer system for intense electric field and voltage sensing

“…The known birefringence and EO parameters of the LiTaO 3 crystal at 1558 nm are n e ¼ 2:1224, n o ¼ 2:1186, r 33 ¼ 27:4 (pm/V), and r 13 ¼ 6:92 (pm/V) [7]. In practice, r 33 E z ( n e , r 13 E z ( n o ; and because dn ¼ Àð1=2Þn 3 dð1=n 2 Þ, the birefringence perturbed by the applied E z can be re-expressed as Eq.…”