Uniform illumination of optically dense NMR samples

I Kuprov; P J Hore

doi:10.1016/j.jmr.2004.08.017

Uniform illumination of optically dense NMR samples

J Magn Reson. 2004 Nov;171(1):171-5. doi: 10.1016/j.jmr.2004.08.017.

Authors

I Kuprov¹, P J Hore

Affiliation

¹ Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK.

PMID: 15504697
DOI: 10.1016/j.jmr.2004.08.017

Abstract

We demonstrate a simple, inexpensive method for in situ laser illumination of NMR samples using a stepwise tapered optical fibre to deliver light uniformly along the axis of a 5 mm NMR tube. The optical path length of the incident light inside the sample is about 3 mm, allowing efficient illumination of optically dense samples. The degradation in spectral resolution and the reduction in filling factor are both minimal. Probe modifications are not required.