22 February 2018 Silicon photonics based on-chip vibrometer
Author Affiliations +
Proceedings Volume 10545, MOEMS and Miniaturized Systems XVII; 105450M (2018) https://doi.org/10.1117/12.2289772
Event: SPIE OPTO, 2018, San Francisco, California, United States
In this paper, we demonstrate a compact silicon photonics based vibrometer using an on-chip photonic grating (OPG) based sensor. OPG works on the principle of interference where the motion of the cantilever is captured at the output as an intensity variation. The advantage of OPG based sensor over conventional Laser Doppler vibrometer is increased tolerance to alignment errors as both the grating and the cantilever can be integrated on a single chip. The grating parameters were optimized using 2D-FDTD to achieved maximum sensitivity to the displacement of a cantilever. OPG with on-chip germanium photodetector is studied, which indicates a sensitivity of 54 μW/nm. We experimentally demonstrate the feasibility of the proposed sensor that can achieve a displacement sensitivity of 5.3 μW/nm.
Conference Presentation
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Viphretuo Mere, Viphretuo Mere, Rakshitha Kallega, Rakshitha Kallega, Akshay Naik, Akshay Naik, Rudra Pratap, Rudra Pratap, Shankar Kumar Selvaraja, Shankar Kumar Selvaraja, } "Silicon photonics based on-chip vibrometer", Proc. SPIE 10545, MOEMS and Miniaturized Systems XVII, 105450M (22 February 2018); doi: 10.1117/12.2289772; https://doi.org/10.1117/12.2289772

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