Multiple particles 3D trap based on all-fiber Bessel optical probe

Yaxun Zhang, Xiaoyun Tang, Yu Zhang, Zhihai Liu, Enming Zhao, Xinghua Yang, Jianzhong Zhang, Jun Yang, Libo Yuan

We propose and demonstrate an all-fiber Bessel optical tweezers for multiple microparticles (yeast cells) 3 dimensional trap. To the best knowledge of us, it is the first time to achieve the 3 dimensional stable non-contact multiple microparticles optical traps with long distance intervals by using a single all-fiber probe. The Bessel beam is produced by splicing coaxially a single mode fiber and a step index multimode fiber. The convergence of the output Bessel beam is performed by molding the tip of the multimode fiber into a special semi-ellipsoid shape. The effective trapping range of the all-fiber probe is 0 to 60μm, which is much longer than normal single fiber optical tweezers probes. The all-fiber Bessel optical probe is convenient to integrate and suitable for the lab on the chip. The structure of this fiber probe is simple, high-precision, low-cost, and small size, which provides new development for biological cells experiment and operation.

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