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A reflection-type interferometer based on a polarization-maintaining photonic crystal fiber is investigated for simultaneous measurement. Different sensitivities corresponding to input polarization states are utilized for discrimination between chemical vapor and temperature effects.
Mach-Zehnder interferometer based on off-set splicing technique of HC-PBGF and SMFs was fabricated. Interference fringe is observed with a maximum interferometric contrast of better than 12dB. We measured the strain, temperature, and refractive index response of the interferometer based on HC-PBGF.
A simple technique for fabrication of an in-line Mach-Zehnder interferometer with a high visibility and wavelength spacing tunability is investigated by using a polarization-maintaining fiber (PMF) depending on the input polarization state.
We fabricated the bitapered HC-PBGF interferometer and demonstrated as the strain and temperature sensor using a fabricated interferometer. The strain and temperature sensitivities of the interferometer were measured to be -1.33 pm/μϵ and 8 pm/°C, respectively.
A Sagnac interferometer based on an optical microfiber is demonstrated. It shows good adjustability of transmission, which enables it to be used as linear edge filter, optical variable attenuator, or gain flattening filter.
A simple scheme for a temperature-insensitive strain sensor based on a birefringent interferometer is investigated. The strain sensitivity is measured to be 1.3 pm/muepsiv in a strain range from 0 to 1600 muepsiv.
Complete cancellation of polarization dependency using a lambda/2-shifted Sagnac loop interferometer is quantitatively characterized for a number of commercial-graded transmission-type optical devices, such as in-line polarizer and variable optical attenuator.
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