Water and Light 'Flow' Inspire Ultrasensitive Optical Microfiber Coupler Sensor

When a river narrows or two rivers run into each other and merge, the water flow's speed increases and it becomes much stronger. Water flow and light flow are similar in many ways, and this inspired a group of researchers to explore whether light flow within a waveguide -- a linear structure that transports electromagnetic waves between endpoints -- behaves in the same manner.

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