Abstract

One of the most frequently applied techniques to detect nanoparticles in air is analyzing laser light scattering. This technique is very flexible while offering high accuracy and reliability. Yet its functionality highly depends on the sensitivity of the measurement system components. Especially for miniaturized sensor devices with limited space, additional techniques are needed to preserve high intensity of scattered light. In our work we demonstrate a technique using two spherical ring mirrors to identify nanoparticles with diameters below 100 nm in a forward-scattering setup. We succeeded measuring polystyrene particles with diameters of 92 nm with a signal-to-noise-ratio of more than 10.

©2012 Optical Society of America

Miniaturized sensor for particles in air using Fresnel ring lenses and an enhanced intensity ratio technique

Robert Schrobenhauser, Rainer Strzoda, Alexander Hartmann, Maximilian Fleischer, and Markus-Christian Amann
Appl. Opt. 53(4) 625-633 (2014)

Highly sensitive liquid-level sensor based on dual-wavelength double-ring fiber laser assisted by beat frequency interrogation

Yi Dai, Qizhen Sun, Sisi Tan, Jianghai Wo, Jiejun Zhang, and Deming Liu
Opt. Express 20(25) 27367-27376 (2012)

Doppler spectrum-based polar nephelometer

Paul L. Kebabian, Timothy B. Onasch, Joda C. Wormhoudt, and Andrew Freedman
Opt. Lett. 37(17) 3654-3656 (2012)

Laser-written nanoporous silicon ridge waveguide for highly sensitive optical sensors

Jinan Xia, Andrea M. Rossi, and Thomas E. Murphy
Opt. Lett. 37(2) 256-258 (2012)

Laser-based air data system for aircraft control using Raman and elastic backscatter for the measurement of temperature, density, pressure, moisture, and particle backscatter coefficient

Michael Fraczek, Andreas Behrendt, and Nikolaus Schmitt
Appl. Opt. 51(2) 148-166 (2012)