Abstract
On-chip optical interrogators employing a silicon-ring-resonator-based thermally tunable filter (SRRTF) offer a promising solution for realizing portable, compact optical sensing systems. However, the slow interrogation speed of conventional SRRTF-based interrogators (less than a few Hz) hinders real-time sensing of dynamic parameters. In this Letter, we report a 100 kHz of high-speed optical interrogation system based on the SRRTF. The speed enhancement is achieved by using the nonlinear transient response of the SRRTF to a square-wave input voltage. The entire spectral range of the SRRTF is scanned twice during its thermal response cycle. The time-domain sensor output signal, which is obtained by scanning the SRRTF over the sensor spectrum, is converted into spectrum domain based on the experimentally characterized, time-dependent resonance wavelength shifts of the SRRTF. With this system, we demonstrate high-speed interrogation of a fiber Bragg grating sensor under dynamic temperature change (200 Hz).
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Fan Yang, Wenjia Zhang, Qingwen Liu, and Zuyuan He
Opt. Lett. 45(23) 6402-6405 (2020)
Wenjian Yang, Shijie Song, Xiaoke Yi, Suen Xin Chew, Liwei Li, and Linh Nguyen
Opt. Lett. 43(1) 70-73 (2018)
Ou Xu, Jiejun Zhang, and Jianping Yao
Opt. Lett. 41(21) 4859-4862 (2016)