Abstract

We propose an all-fiber interferometer based on laser Doppler velocimetry in a dual-beam fiber-optic trap to measure the displacement and velocity of a trapped particle. ABCD matrices are used to compute the contrast ratio of the interference. The influence of the reflectivity of the fiber end face is discussed. We have designed an optimized reflectivity based on the parameters of our setup. The antireflective coatings on the fiber end face are employed to achieve the given reflectivity. The displacement and velocity of the trapped microparticle are successfully measured by the period and frequency of the interference signal, respectively. The sensitivity of the displacement detection is 368 nm. By describing the miniaturization of the detection system, this paper provides a simple and practical scheme to achieve the integration of the entire optical trapping setup.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Micro particle launcher/cleaner based on optical trapping technology

Zhihai Liu, Peibo Liang, Yu Zhang, Yaxun Zhang, Enming Zhao, Jun Yang, and Libo Yuan
Opt. Express 23(7) 8650-8658 (2015)

Optical levitation particle delivery system for a dual beam fiber optic trap

Robert C. Gauthier and Athanasios Frangioudakis
Appl. Opt. 39(1) 26-33 (2000)

Back-focal-plane displacement detection using side-scattered light in dual-beam fiber-optic traps

Wei Xiong, Guangzong Xiao, Xiang Han, Jinhua Zhou, Xinlin Chen, and Hui Luo
Opt. Express 25(8) 9449-9457 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (12)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription