Abstract

A HeCd laser was examined as a light source for dual-beam absorbance measurements by position-sensitive detection. The measurement was limited by the laser point stability and, also, unspecified laser radiation that was effectively reduced by a spatial and spectral filter combination. An absorbance detection limit of 5 × 10⁻⁴ AU (3 × rms baseline noise) was predicted from an experimental optimization procedure. The detection limit was supported by microbore high-performance liquid chronatography of a B-2 vitamin sample, detecting riboflavin absorbance at 325 nm. Issues regarding the improvement of dual-beam absorbance measurements by position-sensitive detection are addressed.

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Quantum noise limit to the beam-pointing stability in stimulated Raman generation

I. A. Walmsley
J. Opt. Soc. Am. B 8(4) 805-812 (1991)

Quantum limits of position-sensitive photodiodes

E. Fradgley, C. French, L. Rushton, Y. Dieudonné, L. Harrison, J. L. Beckey, H. Miao, C. Gill, P. G. Petrov, and V. Boyer
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Absolute angular position measurement by dual-comb spectroscopy of an autocollimation diffracted beam

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Passive beam pointing stabilization

You Wu, Doug French, and Igor Jovanovic
Opt. Lett. 35(2) 250-252 (2010)