Abstract
An up-tapered Mach-Zehnder interferometer (MZI) is proposed and demonstrated. By applying a modification setting of an existing program of the fusion splicer, two up-tapers are fabricated by pushing both sides of the fiber to the middle. It is found that the maximum extinction ratio reaches up to 20 dB. With the fiber length of 6.3–49 cm between the two up-tapers, the free spectral range (FSR) changes from 10.7 nm to 1.3 nm. Besides, the wavelength of maximum extinction ratio shifts to the shorter wavelength in the scope of tens of nanometers, while the elongation changes from 0% to 0.23%.
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This work has been supported by the National Natural Science Foundation of China (Nos.61177069, 61275076 and 61275092), and “973” Program (No.2010CB328206).
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Wen, Xd., Ning, Tg., You, Hd. et al. Up-tapered fiber Mach-Zehnder interferometer fabricated by using a fusion splicer. Optoelectron. Lett. 9, 325–328 (2013). https://doi.org/10.1007/s11801-013-3107-2
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DOI: https://doi.org/10.1007/s11801-013-3107-2