A Highly Birefringent and Nonlinear AsSe<inline-formula><tex-math notation="LaTeX">$_2$</tex-math></inline-formula>&#x2013;As<inline-formula><tex-math notation="LaTeX">$_2$</tex-math></inline-formula>S<inline-formula><tex-math notation="LaTeX">$_5$</tex-math></inline-formula> Photonic Crystal Fiber With Two Zero-Dispersion Wavelengths

• Main Authors: Tianyu Yang, Can Ding, Y. Jay Guo
• Format: Article
• Language: English
• Published: IEEE 2019-01-01
• Series: IEEE Photonics Journal
• Subjects: High birefringence; nonlinearity; photonic crystal fiber; supercontinuum spectrum generation; zero-dispersion wavelength
• Online Access: https://ieeexplore.ieee.org/document/8572789/

A hybrid AsSe₂-As₂S₅ photonic crystal fiber (PCF) with a solid elliptical core is proposed and studied theoretically by the full-vector finite element method. The core and cladding of the PCF are made of AsSe₂ and As₂S₅ glasses, respectively. Simulation results demonstrates that, at the operating wavelength of 1.55 &#x03BC;m, the proposed PCF not only exhibits a very high birefringence of 0.091 but also has large nonlinear coefficients of 147.8 and 78.2 W^-1m^-1 for the X- and Y-polarized (X and Y-pol) modes, respectively. Moreover, it is able to achieve two zero-dispersion wavelengths for both the X-pol (1.52 and 2.19 &#x03BC;m) and Y-pol (1.43 and 2.12 &#x03BC;m) modes. The proposed hybrid PCF exhibits excellent polarization maintaining and the nonlinearity performance, thus, suitable to be used in supercontinuum spectrum generation and polarization maintaining nonlinear signal processing.