A Core-Offset Mach Zehnder Interferometer Based on A Non-Zero Dispersion-Shifted Fiber and Its Torsion Sensing Application

作者：Huerta Mascotte Eduardo; Sierra Hernandez Juan M; Mata Chavez Ruth I; Jauregui Vazquez Daniel; Castillo Guzman Arturo; Estudillo Ayala Julian M; Guzman Chavez Ana D; Rojas Laguna Roberto

来源：Sensors (Switzerland), 2016, 16(6): 856.

DOI：10.3390/s16060856

• Mach-Zehnder interferometer
• fiber optics
• fiber optic sensors
• non-zero dispersion-shifted fiber

In this paper, an all-fiber Mach-Zehnder interferometer (MZI) based on a non-zero dispersion-shifted fiber (NZ-DSF) is presented. The MZI was implemented by core-offset fusion splicing one section of a NZ-DSF fiber between two pieces of single mode fibers (SMFs). Here, the NZ-DSF core and cladding were used as the arms of the MZI, while the core-offset sections acted as optical fiber couplers. Thus, a MZI interference spectrum with a fringe contrast (FC) of about 20 dB was observed. Moreover, its response spectrum was experimentally characterized to the torsion parameter and a sensitivity of 0.070 nm/degrees was achieved. Finally, these MZIs can be implemented in a compact size and low cost.

• 出版日期2016-6