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  • 2013 Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
  • (Optica Publishing Group, 2013),
  • paper CL_2ECBO_3

Microparticle manipulation using modal superpositions in air-filled hollow-core photonic crystal fiber

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Abstract

Higher order Bessel, Airy and Laguerre-Gaussian beams have recently been used to manipulate micrometer-sized objects in free space [1]. Here we use a coherent superposition of the two lowest order forward-propagating modes of a soft glass hollow-core photonic crystal fiber (HC-PCF, Fig. 1a) to control the axial and radial trapping position of particles inside the core. Because each fiber mode propagates at a different phase velocity, the transverse intensity distribution varies periodically along the propagation direction (Fig. 1b). A counter-propagating fundamental mode (FM) is then used to create a series of trapping positions along the fiber. The trapping sites are slightly off-axis, spaced by half the intermodal beat length LB, and can be moved simply by changing the phase Δφ between the two forward-propagating modes.

© 2013 IEEE

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