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Ultracompact fiber all-optical router using a photo-controlled microbubble

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Abstract

An ultracompact fiber router based on a photo-controlled microbubble was proposed in this Letter. Because the microbubble can be repositioned precisely in the fiber microcavity by adjusting the drive laser power, the target light beam that was incident on the gas-liquid interface of the microbubble was routed toward different directions by the light refraction inside the photo-controlled microbubble. Experimental results showed that the device had a low insertion loss of 0.64 dB, response time of (${1.2} {-} {1.8}\;{\rm s}$), and can achieve the continuous beam redirections within an angle range of 56° by exploiting a drive laser power of only 1.8 mW. With the characteristics of excellent controllability, low consumption, and no electromechanical parts, such a fiber all-optical router has potential to be used for the multiplex treatments and analysis applications of the photonic laboratory on a chip (PLOC).

© 2020 Optical Society of America

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Supplementary Material (1)

NameDescription
Visualization 1       In this video, a microbubble was positioned precisely in a fiber microcavity by adjusting the laser power, and so that the target beam was routed toward the desired directions by the photo-controlled microbubble.

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