Coherent light-beating scattering (CLBS) as a new interference technique for size and velocity control

Anatoly T. Sukhodolsky; P. A. Sukhodolsky

doi:10.1117/12.312968

30 June 1998 Coherent light-beating scattering (CLBS) as a new interference technique for size and velocity control

Anatoly T. Sukhodolsky, P. A. Sukhodolsky

Proceedings Volume 3478, Laser Interferometry IX: Techniques and Analysis; (1998) https://doi.org/10.1117/12.312968
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

An introduction into the elements of diffraction theory of coherent scattering of vector waves for size and velocity measurements is proposed to discuss. In traditional approach, a square-law detection is to observe beating in optical signal consists of two components: scattered coherent vector waves with variable states of their vectors of polarization (coherent light beating scattering-CLBS). Vectorial optical signal of CLBS is considered in framework of Fraunhofer diffraction of two plane vector waves by a single particle in case of periodical modulation of vector of polarization described as Jones vector. The formalism of Jones matrix is proposed to describe CLBS by a distribution of particles to control their sizes and velocities. A portable CLBS-spectrometer for size and motility application in biology is described. In traditional spectroscopy of optical beating, a particle alone provides with one scattered component of scalar wave to mix with a narrow-band reference wave on a square-law photodetector. As a result, a community of particles in motion givers fluctuation of intensity available to next spectral analysis of electrical signal. By CLBS, in contrast, a single particle is to form two vectorial scattered coherent components to beat on photodetector that joints beating and scattering as the basis of a new active control of a distribution of particles with possibility of simultaneous k-spectroscopy of sizes and w-spectroscopy of velocities. The preliminary experimental results on control of several types of plankton and sperm are discussed in scope of using CLBS as a new optical standard to measure of bioactivity.

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Anatoly T. Sukhodolsky and P. A. Sukhodolsky "Coherent light-beating scattering (CLBS) as a new interference technique for size and velocity control", Proc. SPIE 3478, Laser Interferometry IX: Techniques and Analysis, (30 June 1998); https://doi.org/10.1117/12.312968

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KEYWORDS

Particles

Scattering

Spectroscopy

Light scattering

Laser scattering

Diffraction

Modulation

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