Simulation of a short and broadband polarization splitter based on photonic crystal fiber filled with tellurite glass

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• 作者：Qiang Liu ; Shuguang Li ; Xinyu Gao ; Xinxing Feng
• 关键词：Photonic crystal fiber ; Polarization splitter ; Extinction ratio
• 刊名：Optical and Quantum Electronics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：49
• 期：2
• 全文大小：
• 刊物主题：Optics, Lasers, Photonics, Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X
• 卷排序：49

文摘

A polarization splitter based on dual-core photonic crystal fiber filled with tellurite glass in the central hole is proposed. The characteristics are studied by finite element method. The influences of the parameters \(d_{1}, d_{2}, \varLambda\) on the coupling length and coupling length ratio (CLR) are analyzed. The curves of coupling lengths of X-polarization, Y-polarization light dependence on the operable wavelength \(\lambda\) are flat under the optimized structural parameters which is helpful to realize broadband polarization splitter. The simulation results indicate that the CLR could reach to 2.006 at the wavelength of \(1.55\,\upmu {\hbox {m}}\). The fiber length is only 510 \(\upmu {\hbox {m}}\) and the bandwidth of extinction ratio greater than 20 dB is 284 nm, i.e., from 1461 to 1745 nm which could be widely used in the large-capacity, broad-bandwidth and integrated optical communication systems. As the fiber length decreases, we find the bandwidth increases. But the extinction ratio at 1.55 \(\upmu {\hbox {m}}\) is lower than 20 dB as the fiber length is less than 510 \(\upmu {\hbox {m}}\).