All passive architecture for high efficiency cascaded Raman conversion

High-efficiency cascaded up and down conversion in nonlinear Kerr cavities.

In this work, we derive general conditions to achieve high efficiency cascaded third harmonic generation and three photon parametric down conversion in Kerr nonlinear resonant cavities. We employ the general yet rapid temporal coupled-mode method, previously shown to accurately predict electromagnetic conversion processes in the time domain. In our study, we find that high-efficiency cascaded t...

Rotational Raman generation with near-unity conversion efficiency.

We demonstrate collinear generation of equidistant rotational sidebands in low-pressure molecular hydrogen with near-unity conversion efficiency. The spectrum consists of 37 coherent sidebands covering over 20, 000 cm(-1) of spectral bandwidth and ranging from 1.37mum to 352 nm in wavelength.

High-Speed All-Optical Switches Based on Cascaded SOAs

Passive all-optical force clamp for high-resolution laser trapping.

Optical traps are useful for studying the effects of forces on single molecules. Feedback-based force clamps are often used to maintain a constant load, but the response time of the feedback limits bandwidth and can introduce instability. We developed a novel force clamp that operates without feedback, taking advantage of the anharmonic region of the trapping potential where the differential st...

High Performance Method for Skin Roughness Detection Using Raman Spectroscopy