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Differential mode gain equalization via femtosecond laser micromachining induced refractive index tailoring

August 28, 2024 sarah JonasResearch Results

Mode division multiplexing technology is regarded as a promising solution to solve the capacity crunch of the standard single-mode fiber transmission system. However, the differential mode gain arising in the few-mode fiber transmission system would increase the complexity of the received signal processing.

Unveiling a New Quantum Frontier: Frequency-Domain Entanglement

April 23, 2024 sarah JonasResearch Results

Entanglement has paved the way for enriching our understanding of physics and implementing quantum information technology. Scientists at POSTECH introduce a new type of entanglement: Frequency-domain photon number-path entanglement. Utilizing a frequency beam splitter converting single-photon frequency with a 50% probability, they observe a two-fold enhanced resolution of interference pattern compared to the single-photon counterpart, with unprecedented stability.

A data river runs through it

July 29, 2021 sarah JonasFeature

Data and signals can be transmitted quickly and reliably with glass fibers – as long as the fiber does not break. Strong bending or tensile stress can quickly destroy it. An Empa team has now developed a fiber with a liquid glycerol core that is much more robust and can transmit data just as reliably. And such fibers can even be used to build microhydraulic components and light sensors.