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Influence of Na-related defects on ArF laser absorption in CaF2

Tunable narrow band filter for CARS microscopy

In this letter we present an approach to CARS mi- croscopy, which compromises between fast acquisition rates and the amount of chemical information obtained. By using a light modulator as tunable filter...

Spatially resolved determination of the structure and composition of diatom cell walls by Raman and FTIR imaging

Vibrational spectroscopic imaging has developed into a versatile tool to study the local composition of various materials. Here, we present for the first time that Raman mapping and Fourier-transform infrared...

Dynamics of droplet formation at T-shaped nozzles with elastic feed lines

Generation of green light in a thermally poled silica fiber by quasi-phase-matched second harmonic generation

Thermal poling is an attractive method to induce a nonlinear coefficient in silica materials. We have investigated potential silica materials with respect to their suitability for thermal poling and analyzed...

Fiber-optic Bragg gratings as magnetic field-insensitive strain sensors for the surveillance of cryogenic devices

While conventional electrical resistance strain gages show increasing cross-sensitivities to temperature and magnetic field with decreasing temperature down to liquid helium, it has been found that fiber-optic...

Sensitive Measurement of Partial Coherence Using a Pinhole Array

Biochemical imaging below the diffraction limit – probing cellular membrane related structures by tip-enhanced Raman spectroscopy (TERS)

A first vibrational mapping on the nanometer scale was performed on a protein (streptavidin) labelled supported phospholipid film by means of tip-enhanced Raman spectroscopy (TERS). For this purpose a...

Electrically tunable Lyot filter for fast wavelength switching of diode-pumped solid-state disk lasers

A new setup for fast wavelength switching of an Yb:YAG disk laser uses a lithium niobate Lyot filter. It is modeled by the Jones matrix formalism and it is tested experimentally. Applying a high voltage...

Probing the structure and Franck-Condon region of protochlorophyllide a through analysis of the Raman and resonance Raman spectra

The structure and Franck–Condon region of protochlorophyllide a, a precursor in the biosynthesis of chlorophyll and substrate of the light-regulated enzyme protochlorophyllide oxidoreductase (POR), were...