抄録
We propose a fiber-based in-line Mach-Zehnder interferometer capable of simultaneous measurement of acoustic signals and temperature. This interferometer employs distinctive peanut-shaped junctions which are fabricated by the discharge function of an optical fiber fusion splicer. With the peanut-shaped junctions, a single-mode optical fiber(SMF), a polarization-maintaining optical fiber(PMF), and another single-mode optical fiber(SMF) are connected to form a SMF-PMF-SMF structure. By using the curvature and temperature dependencies of the sensor's extinction wavelength in the interferometer, we have achieved a highly sensitive acoustic and temperature sensor.