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1 August 2021 Self-adjusted counter-propagating intra cavity optical trapping
Fatemeh Kalantarifard, Giovanni Volpe, Parviz Elahi
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Proceedings Volume 11798, Optical Trapping and Optical Micromanipulation XVIII; 1179820 (2021) https://doi.org/10.1117/12.2594480
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
We demonstrate a novel intracavity optical trapping approach based on a self-adjusted counter propagation beam. In this configuration, the trapping part is placed within a backward pumping fiber ring cavity. The particle in this setup is trapped by two counter propagation beams including pump, from top to bottom and signal from bottom to top. This trapping scheme benefits from the cavity design in which the individual beams are adjusted depending on the displacement of the trapped particle. When the particle is in the center of the trap and turns the laser signal off, the pump then automatically turns on and this keeps the particle in the trap position. We believe this approach can find its applications in the trapping of submicron particles where the previous intracavity OTs were not able to trap, especially biological samples that are subjected to photo-damage due to the intensity of laser light.
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Fatemeh Kalantarifard, Giovanni Volpe, and Parviz Elahi "Self-adjusted counter-propagating intra cavity optical trapping", Proc. SPIE 11798, Optical Trapping and Optical Micromanipulation XVIII, 1179820 (1 August 2021); https://doi.org/10.1117/12.2594480
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KEYWORDS
Optical tweezers
Particles
Fiber lasers
Aspheric lenses
Beam propagation method
Laser applications
Laser communications
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