Abstract
AbstractWe propose highly nonlinear composite microstructured optical fibers (CMOFs) which consist of the TeO2‐ZnO‐Li2O‐Bi2O3 (TZLB) tellurite glass core surrounded by a ring of 6 air holes. The fibers were fabricated by a conventional casting rod‐in‐tube method. The size of core and air holes could be con‐trolled easily by inflation pressure. The P2O5‐ZnO‐Na2O‐K2O (PZNK) phosphate glass with similar thermal properties of TZLB was used as a cladding material. Since PZNK glass has low refractive index of 1.511 at 1.54 µm, the refractive index difference between the core and cladding is as large as 0.49 which is favorable to tailor the chromatic dispersion of highly nonlinear optical fibers. To realize zero‐flattened chromatic dispersion, the structure parameters such as the tellurite core diameter, the air hole diameter and the distance between the two neighboring air holes were optimized. As it was shown that zero dispersion wavelengths could be shifted freely from the mid‐infrared region to the telecom window by numerical calculation, we confirmed that our tellurite‐phosphate CMOFs are promising candidates as dispersion tailored highly nonlinear fibers for optical signal processing applications (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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