Intracavity optical trapping with ytterbium doped fiber

Date
2013
Authors
Laser, R.
Sayed, R.
Kalantarifard, Fatemeh
Elahi P.
İlday, F. Ömer
Volpe, Giovanni
Marago O.M.
Editor(s)
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Supervisor
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Instructor
Source Title
Proceedings of SPIE
Print ISSN
Electronic ISSN
Publisher
SPIE
Volume
8810
Issue
Pages
88102S-1 - 88102S-8
Language
English
Journal Title
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Abstract

We propose a novel approach for trapping micron-sized particles and living cells based on optical feedback. This approach can be implemented at low numerical aperture (NA=0.5, 20X) and long working distance. In this configuration, an optical tweezers is constructed inside a ring cavity fiber laser and the optical feedback in the ring cavity is controlled by the light scattered from a trapped particle. In particular, once the particle is trapped, the laser operation, optical feedback and intracavity power are affected by the particle motion. We demonstrate that using this configuration is possible to stably hold micron-sized particles and single living cells in the focal spot of the laser beam. The calibration of the optical forces is achieved by tracking the Brownian motion of a trapped particle or cell and analysing its position distribution. © 2013 SPIE.

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Keywords
Optical trapping, Digital video microscopy, Fiber-ring lasers, Micron-sized particles, Numerical aperture, Opticaltrapping, Particle tracking, Working distances, Ytterbium doped fibers, Fiber lasers, Micromanipulators, Multimedia systems, Optical feedback, Optical tweezers, Ring lasers, Feedback
Citation
Published Version (Please cite this version)