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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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1550 nm infrared/visible light switchable liquid optical switch.

Chao Liu, Di Wang, Guang-Xu Wang

|April 1, 2020

Summary

A novel liquid optical switch utilizes hydraulic control to switch between infrared and visible light. This device offers tunable optical attenuation, with potential applications in optical communications and variable optical attenuators.

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Area of Science:

Photonics and Optical Engineering
Materials Science
Fluid Dynamics

Background:

Optical switches are crucial components in modern communication systems.
Existing optical switches often face limitations in terms of speed, cost, or tunability.
The development of novel switching mechanisms is essential for advancing optical technologies.

Purpose of the Study:

To propose and demonstrate a novel liquid optical switch.
To achieve infrared (1550 nm) and visible light switching using hydraulic control.
To investigate the optical attenuation characteristics of the proposed device.

Main Methods:

A stacked structure comprising infrared, visible, and liquid control cavities was designed.
Glycerol, dyed liquid, and transparent liquid were used as optical media.
Elastic films were employed to control liquid volume and form light channels via hydraulic actuation.
Optical attenuation was measured for both infrared and visible light wavelengths.

Main Results:

The liquid optical switch successfully demonstrated on/off states for both 1550 nm infrared and visible light (450 nm, 532 nm, 633 nm).
Significant optical attenuation ranges were achieved: ~1.02-18.24 dB for infrared and ~0.62-9.00 dB for visible light.
The device exhibited tunable optical attenuation through hydraulic pressure control.

Conclusions:

A functional liquid optical switch based on hydraulic control has been successfully developed.
The device offers switchable functionality for both infrared and visible light with tunable attenuation.
Potential applications include optical fiber communications, variable optical attenuators, and light shutters.