A cascaded photonic crystal fiber Mach–Zehnder interferometer formed by extra electric arc discharges
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- Geng, Y., Li, X., Tan, X. et al. Appl. Phys. B (2011) 102: 595. doi:10.1007/s00340-010-4238-9
In this paper, a cascaded Mach–Zehnder interferometer based on a photonic crystal fiber is reported. It is demonstrated that by applying a small dose of extra arc discharge to the photonic crystal fiber sensing part which is spliced to lead-in and lead-out single-mode fibers with core offset, the in-line Mach–Zehnder interferometer could be simply cascaded. From the analysis of Fourier transformed spatial spectra and the response tests as a sensor, it is shown that such a cascaded interferometer could effectively broaden the utilizable spectral shift range for a measured value.