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Fabrication and Testing of Photonic Thermometers

Published

Author(s)

Nikolai Klimov, Zeeshan Ahmed

Abstract

In recent years, a push for developing novel silicon photonic devices for telecommunications has generated a vast knowledge base that is now being leveraged for developing sophisticated photonic sensors. Silicon photonic sensors seek to exploit the strong confinement of light in nano-waveguides to transduce changes in physical state to changes in resonance frequency. In the case of thermometry, thermo-optic coefficient, i.e. changes in refractive index due to temperature, cause the resonant frequency of the photonic device such as a Bragg grating to drift with temperature. We are developing a suite of photonic devices such as on-chip Bragg waveguides, ring resonators and photonic crystal cavities that leverage advances in microwave and C-band light sources to fabricate cost-effective photonic temperature sensors. Our preliminary results indicate that using photonic devices such as a ring resonator we can measure short term temperature fluctuations of >100 μK at room temperature. Photonic sensor technology provides a low cost, lightweight, portable and EMI resistant solution which can be deployed in a wide variety of settings ranging from controlled laboratory conditions, a noisy factory floor, advanced manufacturing, to the variable environment of a residential setting.
Citation
Journal of Visualized Experiments

Keywords

photonics, silicon photonics, waveguide, photonic crystal cavity, C-band, ring resonator

Citation

Klimov, N. and Ahmed, Z. (2018), Fabrication and Testing of Photonic Thermometers, Journal of Visualized Experiments (Accessed February 25, 2024)
Created October 23, 2018, Updated October 12, 2021