We demonstrate a dual pulse-shaper setup capable of independent polarization, phase, and amplitude control over each pulse. By using active phase stabilization, we achieve a phase stability of ~λ/314 between the two pulse shapers, making the dual-shaper setup suitable for both two-quantum and one-quantum measurements. The setup is compact and easily switchable between pump-probe and collinear geometries. We further illustrate the functionality of the dual-shaper setup by performing two-color 2D visible spectroscopy on colloidal CdSe quantum dots in pump-probe geometry.

Articles you may be interested inReal-time single-shot three-dimensional and contrast-enhanced optical coherence imaging using phase coherent photorefractive quantum wells Appl. Phys. Lett. 97, 251116 (2010); 10.1063/1.3531589Depth-resolved holographic optical coherence imaging using a high-sensitivity photorefractive polymer device

A finite element-based, rigorous full-vectorial modal solution approach has been developed to calculate the effective index of the fundamental space filling mode, the cut-off condition of the fundamental and the second guided modes to identify single mode operation ranges for a photonic crystal fiber design. Furthermore, structural asymmetry has been introduced in the model to maximise the modal birefringence to create a design for polarization maintaining photonic crystal fiber.

We demonstrate two real-time optical coherence imaging acquisition modes using all-optical phase coherent photorefractive ZnSe quantum wells as dynamic holographic films. These films use the coherence of excitons for time-gating which provides depth information of an object according to the brightness profile of its holographic image. This quality allows depth-resolved imaging of moving particles with a resolution of a few micrometers in a single-shot three-dimensional mode. In a complementary contrast-enhanced mode moving particles are imaged by the local enhancement of a static reference hologram, enabling optical coherence imaging at a large depth-of-field.

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