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Investigation of Temperature Sensitivity of a Polymer-Overlaid Microfiber Mach-Zehnder Interferometer
摘要： The temperature sensitivity of the free spectral range (FSR) for a polymer-overlaid microfiber Mach-Zehnder interferometer (MZI) is investigated both theoretically and experimentally. The waist diameter of the optical microfiber can be controlled to alter the thermal expansion and optic properties of the polymer-coated MZI. Inserting an optical microfiber with a strong evanescent field into the MZI, a low index polymer with high thermal characteristics is deposited on the surface of the microfibers to realize a polymer-overlaid microfiber MZI. It was found that the thermal expansion factor in the proposed MZI plays an important role in the temperature sensitivity of the FSR. The temperature sensitivity of the polymer-overlaid microfiber MZI is improved, which is measured to be ?8.29 nm/?C at 25 ?C. The optical transmission spectrum of the polymer-overlaid microfiber MZI is converted to the spatial frequency spectrum via fast Fourier transform. The temperature sensitivity of the spatial frequency in the proposed polymer-overlaid MZI is estimated to be 18.31 pm?1 ?C?1, which is 17 times higher than that of the microfiber MZI without polymer coating (1.04 pm?1 ?C?1).
关键词： temperature sensors,thermo-optic effect,thermal expansion effect,microfibers,microfiber Mach-Zehnder interferometers
更新于2025-09-10 09:29:36
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[IEEE 2018 IEEE Photonics Conference (IPC) - Reston, VA, USA (2018.9.30-2018.10.4)] 2018 IEEE Photonics Conference (IPC) - Measuring Thermal Acoustic Radiation with an Optomechanical Antenna
摘要： We optically probe the SiN membrane nanomechanical resonator modes that are strongly coupled to acoustic radiation into the substrate. We use this optomechanical system for temperature metrology by detecting the ballistic transport of thermal excitations from a remote bath.
关键词： Metrology,Temperature Sensors,Optomechanics,Photonics,Thermal Noise,Nanophotonics
更新于2025-09-09 09:28:46