Ultra-sensitive silicon photonic current sensor using a ring resonator. (29th June 2016)

• Record Type: Journal Article
• Authors: Wei, Bing; Zhao, Changyun; Wang, Gencheng; Dai, Tingge; Wang, Yuehai; Yang, Jianyi; Li, Yubo
• Is Part Of: Journal of optics. Volume 18:Number 8(2016:Aug.)
• Publication Date: 2016-06-29
• Subjects: current sensor -- integrated optics devices -- ring resonator; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8978/18/8/085802
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: We proposed and experimentally investigated a compact and ultra-sensitive integrated photonic current sensor based on a silicon ring resonator in this paper. The current flowing through the integrated resistive TiN heater produces the Joule's heat and changes the temperature, which results in the change of refractive index and physical dimensions of the ring. An optical spectrum analyzer is used to monitor the resonant wavelength shift of the ring. The experiment results show that the sensor achieves an ultra-high sensitivity of 6.8 × 10 4 nm A −2 and good linearity between real-time current and wavelength shift in the test range of 0–10 mA.