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We experimentally and theoretically demonstrate a tunable bandpass filter based on the optically induced transparency enabled by dynamical interference of continuous radiation modes and localized whispering gallery modes (WGMs) with… Click to show full abstract
We experimentally and theoretically demonstrate a tunable bandpass filter based on the optically induced transparency enabled by dynamical interference of continuous radiation modes and localized whispering gallery modes (WGMs) with a Surface Nanoscale Axial Photonics (SNAP) platform. The tunability in bandwidth and power transfer efficiency is achieved by scanning the microfiber which achieves a high power transfer efficiency up to 1.43, high out-of-band rejection of ~31 dB, and bandwidth tunability of 30.6 MHz~2.32 GHz. The combination of easy alignment, fiber compatibility, high efficiency, and robust wide-range tunability facilitates applications ranging from quantum optics to photonic networks.
Journal Title: Applied Physics Express
Year Published: 2019
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