Abstract

In this paper, we design a polarization-maintaining ${\mathrm{CS}}_2$-core photonic crystal fiber (PM-CCPCF). The two air holes in the $x$ direction are infiltrated with ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ in order to introduce birefringence. By optimizing the structure parameters of the PM-CCPCF, it is demonstrated that the $x$-polarization fundamental mode has an all-normal dispersion profile and the corresponding $y$-polarization fundamental mode has an anomalous dispersion profile for a pump wavelength of 1.76 μm. Then, we investigate the supercontinuum (SC) generations when different fiber lengths, pump peak powers, and pump pulse widths are chosen, respectively. Simulation results show that for the $x$-polarization and $y$-polarization fundamental modes, highly coherent SCs can be generated by appropriately choosing the fiber length and pump pulse parameters. Finally, nonlinear propagation dynamics are analysed when the optimized fiber length and pump pulse parameters are used. The bandwidth of the SCs generated for the $x$-polarization and $y$-polarization fundamental modes can be up to 0.82 and 1.26 octave, respectively.

© 2019 Optical Society of America

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