title: All-silica fiber Bessel-like beam generator and its applications in longitudinal optical trapping and transport of multiple dielectric particles.
abstract: A Bessel-like beam was generated in a novel all-fiber integrated structure. A concentric ring intensity pattern was achieved by the multimode interference along the coreless silica fiber, which was then focused by the integrated micro-lens to result in a Bessel-like beam. The average beam diameter of 7.5 μm maintained over 500 μm axial length for a continuous wave Yb-doped fiber laser input oscillating at the wavelength of 1.08 μm. The generated beam was successfully applied to two-dimension optical trapping and longitudinal transport of multiple dielectric particles confirming its unique non-diffracting and self-reconstructing nature. Physical principle of operation, fabrication, and experimental results are discussed.
authors.affiliation: Institute of Physics and Applied Physics, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea.
authors.forename: Sung Rae
authors.initials: SR
authors.lastname: Lee
authors.forename: Jongki
authors.initials: J
authors.lastname: Kim
authors.forename: Sejin
authors.initials: S
authors.lastname: Lee
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Jung
authors.forename: Jun Ki
authors.initials: JK
authors.lastname: Kim
authors.forename: K
authors.initials: K
authors.lastname: Oh