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Updated: May 14, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
Published on: January 7, 2019
Ultra-highly sensitive optical gas sensors based on chemomechanical polymer-incorporated fiber interferometer
Mi-Kyung Bae1, Jung Ah Lim, Sangsig Kim
1Future Convergence Research Division, Korea Institute of Science and Technology, Seoul 136-791, South Korea.
Abstract:
We demonstrate a novel optical sensor for use in explosive gas detection, having a simple structure, ultrahigh sensitivity, room-temperature sensing/refreshing operation, and no local power requirements. The sensor relies on a fiber Fabry-Pérot interferometer prepared using poly(4-vinylpyridine), which induces cavity expansion upon absorption of nitrobenzene, thereby shifting the phase matching conditions of the resonating modes. An estimated sensitivity limit as low as 5 ppb was achieved.
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