Researchers have unveiled an unusual optical fiber made by freezing liquid inside a glass capillary. The result is a fiber that can carry both light waves and sound waves at the same time, creating a much tighter interaction between the two than conventional glass fibers allow.
According to the research summary, the new design increases the coupling between light and sound by around 1,000 times compared with standard glass fiber. That stronger link is significant because many photonic technologies rely on controlling how optical and acoustic signals influence each other.
The approach stands out because it uses a frozen structure rather than a fully solid, traditional glass fiber. By combining the properties of the glass capillary with the frozen liquid core, the fiber appears to create conditions that greatly improve how efficiently light and sound can be guided and mixed within the same channel.
A coupling strength this high could help reduce the energy needed in devices that depend on these interactions. While the full range of applications was not detailed in the trimmed report, the advance points to a potentially important new platform for more efficient fiber-based photonic and optoacoustic technologies.
