Megahertz Bandwidth Bulk Micromachined Optomechanical Accelerometer with Fiber Optical Interconnects
INERTIAL 2021 - 8th IEEE International Symposium on Inertial Sensors and Systems, Proceedings
We present the design, fabrication, and initial characterization of a CMOS compatible, ultra-high bandwidth, bulk-micro machined, optomechanical accelerometer. Displacement detection is achieved via a SiN integrated photonics Mach-Zehnder interferometer (MZI) fabricated on the surface of the device that is optomechanically coupled to acceleration-induced deformation of the accelerometer's proof mass tethers. The device is designed to measure vibrations at microsecond timescales with high dynamic range for the characterization of shock dynamics.