Nanowerk June 17, 2022 Conventionally, high-Q resonators that have a minimum loss in optical power are used to generate ultra-narrow optical features in solid-state, but they require complex and costly fabrication processes, which limits their large-scale commercial production. Researchers in Canada have demonstrated a resonator-free approach to generate such ultra-narrow features exploiting gain-enhanced polarization pulling in a twisted birefringent medium where polarization eigenmodes are frequency-dependent. Using Brillouin gain in a commercial spun fibre, they experimentally achieved a 0.72 MHz spectral dip. Further optimization can potentially reduce the linewidth to <0.1 MHz. According to the researchers their approach is simple and broadly […]
Tag Archives: Resonators
Breakthrough paves way for photonic sensing at the ultimate quantum limit
Phys.org June 6, 2022 Quantum states of light have been shown to enhance precision in absorption estimation over classical strategies. However, most quantum sensing schemes rely on special entangled or squeezed states of light or matter that are hard to generate and detect. Researchers in the UK have shown it is possible to perform high precision measurements of important physical properties without the need for sophisticated quantum states of light and detection schemes. The key to this breakthrough is the use of ring resonators that guide light in a loop and maximize its interaction with the sample under study. Importantly, […]