Ms. Lee A. Capistran Profile

Lee A. Capistran

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Proceedings Article | 8 March 2023 Presentation + Paper

Wide-band dual optomechanical resonator for inertial navigation

Lee Capistran, Adam Hines, Jonathan Joseph Carter, Xiangyu Guo, Guillermo Valdes, Jose Sanjuan, Felipe Guzman

Proceedings Volume 12447, 1244718 (2023) https://doi.org/10.1117/12.2655504

KEYWORDS: Resonators, Interferometers, Laser resonators, Vacuum, Heterodyning, Accelerometers, Mirrors, Laser frequency, Beam path, Vibration

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Accelerometers are key sensors in many fields and applications such as precision metrology, gravimetry measurements, gravitational wave observatories, and navigation where position and attitude need to be determined accurately. A combination of six accelerometers provides all the necessary information to estimate position and orientation of a rigid body and thus serves as an inertial navigation system for autonomous navigation. Fusedsilica based mechanical resonators paired with laser interferometric read-outs enable compact high-accuracy accelerometers. In this talk, we will present a wide-band accelerometer based on a double resonator with two test masses of different sizes in a single frame. One of the resonators has a resonance frequency of about 50 Hz, while the other is optimized for lower frequencies and has a nominal frequency of about 10 Hz. The combination of the two resonators allows for excellent long-term precision while maintaining good measurement bandwidth. We will show the experimental characterization in air and in vacuum of the double-resonator using a heterodyne laser interferometer and a fiber interferometer and its expected performance as an inertial sensor.

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