27‐3: Deformed Helix Ferroelectric Liquid Crystal Based Threshold‐Less Passive Vibration Sensing System.

In this article, we proposed a passive vibration sensing system using a threshold‐less deformed helix ferroelectric liquid crystal (DHFLC) cell. Combining the DHFLC cell, piezoelectric film, and optical detector, the system can transform the slight vibration into light intensity signal without a power supply. The system can reach the sensitivity of 165 V/(m/s) and the linearity <1% full range output. The proposed system will be combined with optical fibers to play an essential role in various vibration‐sensing array applications. [ABSTRACT FROM AUTHOR]