Multiple‐crystal x‐ray topographic characterization of periodically domain‐inverted KTiOPO4 crystal

Multiple-crystal x-ray topographic characterization of periodically domain-inverted KTiOPO4 crystal

Optical Parametric Amplification with Periodically Poled KTiOPO4

This thesis explores the use of engineered nonlinear crystals from the KTiOPO4 (KTP) family as the gain material in optical parametric amplifiers (OPAs), with the aim to achieve more knowledge about the benefits and limitations of these devices. The work aims further at extending the possible applications of OPAs by constructing and investigating several efficient and well performing amplifiers...

Evaluation of Second Order Nonlinearity in Periodically Poled KTiOPO4 Crystal Using Boyd and Kleinman Theory

The effective nonlinearity ENL of periodically poled KTiOPO4 crystal is precisely measured with SHG experiment at various focusing conditions. The result shows the optimum focusing condition which maximizes the ENL at focusing parameter ξ at around 2.8 and is consistent with Boyd and Kleinman theory. The analysis based on the theory shows the nonlinear optical coefficient d33 of 17.5 [pm/V].

Source of polarization entanglement in a single periodically poled KTiOPO4 crystal with overlapping emission cones.

We present a simple polarization entanglemenet source based on type-II phase-matched parametric down-conversion in periodically poled KTiOPO4. By use of noncritical phase matching in a noncollinear geometry the single-crystal source emits a cone of polarization-entangled photons. Two beams on opposite sides of the cone are selected for measurements to yield an observed flux of 820 pairs/s per m...

Generation of tunable green radiation in bulk periodically poled KTiOPO4

We report a characterisation of a flux-grown periodically poled KTiOPO4 crystal used for second-harmonic generation in a diode laser source, that operates with fundamental radiation tunable around 1083 nm wavelength. The conversion efficiency is measured for the three different grating periods of the crystal, as a function of input wavelength, crystal temperature and fundamental power. The meas...