Micro-optical vibrometer/accelerometer using dielectric microspheres.

In this paper, an optical vibrometer/accelerometer is designed using micro-optical dielectric sensors based on whispering gallery modes (WGM) phenomena. The proposed design is created as a sphere made from polydimethylsiloxane (PDMS). The dielectric sensor would be laid between a piezo stack and a proof mass of 10  kg (implemented as body force to the sensor) in the vertical position.

High data rate transient sensing using dielectric micro-resonator.

An approach to high-speed tracking of optical mode shifts of microresonators for wide-bandwidth sensing applications is presented. In the typical microresonator sensor, the whispering gallery optical modes (WGM) are excited by tangentially coupling tunable laser light into the resonator cavity, such as a microsphere. The light coupling is achieved by overlapping the evanescent field of the cavity with that of a prism or the tapered section of a single-mode optical fiber.

Effect of angular velocity on sensors based on morphology dependent resonances.

We carried out an analysis to investigate the morphology dependent optical resonances shift (MDR) of a rotating spherical resonator. The spinning resonator experiences an elastic deformation due to the centrifugal force acting on it, leading to a shift in its MDR. Experiments are also carried out to demonstrate the MDR shifts of a spinning polydimethylsiloxane (PDMS) microsphere.