Journal
OPTICS COMMUNICATIONS
Volume 517, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2022.128333
Keywords
Particle; Optical tweezer; Fiber optical tweezer; Trapping; Axial reciprocating motion
Categories
Funding
- Joint Guidance Project of Natural Science Foundation of Heilongjiang Province, China [LH2021F008]
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The manipulation of particles is important in various fields, and this study demonstrates a structure that allows for multi-wavelength excitation and the use of multi-mode beams for particle manipulation. Experimental results show the achievement of separate focus points and stable traps, as well as axial reciprocating transfer of particles between these points without moving the fiber.
The manipulation of particles is of great significance in the fields of biology, physics, and chemistry. We injected laser sources with wavelengths of 650 nm and 980 nm in a single-mode fiber, so that the LP01 mode beam and the LP11 mode beam in this single-mode fiber were excited separately. Then we constructed a flat-facet fiber probe and built a simulation model for it, and we used it to carry out particle trapping experiments. Experimental results show that this fiber probe enables two laser beams to achieve focus separation after passing through it. It can achieve stable trap at two focal points separately. In addition, it can achieve the axial reciprocating transfer of particles between two focal points without moving the fiber. The experimental results are supported by our numerical simulations. This structure makes it possible for multi-wavelength excitation and the use of multi-mode beams for particle manipulation.
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