采用超连续谱激光的双光束光纤光阱实验

胡孔云; 肖光宗; 张莹; 陈鑫麟; 谢元平

doi:10.3788/CO.20171003.0370

Volume 10 Issue 3

May 2017

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Chinese Optics > 2017 > 10(3): 370-375.

HU Kong-yun, XIAO Guang-zong, ZHANG Ying, CHEN Xin-lin, XIE Yuan-ping. Double-beam fiber optical trap experiments based on supercontinuum laser[J]. Chinese Optics, 2017, 10(3): 370-375. doi: 10.3788/CO.20171003.0370

Citation:

HU Kong-yun, XIAO Guang-zong, ZHANG Ying, CHEN Xin-lin, XIE Yuan-ping. Double-beam fiber optical trap experiments based on supercontinuum laser[J]. Chinese Optics, 2017, 10(3): 370-375. doi: 10.3788/CO.20171003.0370

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Double-beam fiber optical trap experiments based on supercontinuum laser

doi: 10.3788/CO.20171003.0370

1.
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
2.
State Key Laboratory of Transient Optics and Photonics, X'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Funds:

Open Research Fund of State Key Laboratory of Transient Optics and Photonics SKLST201507

Received Date: 13 Jan 2017
Rev Recd Date: 16 Mar 2017
Publish Date: 01 Jun 2017

Abstract

Abstract

The experimental system of dual-beam fiber optical trap is proposed and built for the first time which can realize the trapping and manipulation of polystyrene microspheres by taking the supercontinuum laser as the trapping light source. The position of the microsphere is manipulated by changing the relative position of the two optical fiber end faces and output power of the fibers. The CCD image analysis method is used to measure the position of the microsphere. The power spectrum is calculated by Fourier transform of the position variation of the confined Brown motion. After fitting the theoretical power spectrum function, the optical trap stiffness is obtained. The results show that when the power of the captured beam is 28 mW, the optical trap stiffness can reach 1.3×10^-6 N/m, which is higher than that of the single wavelength optical trap under the same experimental conditions. By taking advantage of the wide spectrum of the dual-beam optical trap system, the physical parameters such as the size and refractive index can be obtained by studying the scattering spectrum information of the captured particles which is different from the traditional use of monochromatic light as the captured light of the optical tweezers.
- supercontinuum,
- fiber optical trap,
- stiffness of optical trap,
- manipulation

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References(20)

References

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