A kind of single-polarization single-mode photonic crystal fiber

Abstract A kind of single-polarization and single-mode totally internal reflection photonic crystal fiber (SPSM TIR-PCF) is proposed in this paper. It is a PCF structure with elliptical air holes in the cladding and four large holes in the first ring. A full-vector plane wave expansion method is employed to analyze this PCF structure. The numerical results show that this PCF structure can realize an ultra-broad SPSM bandwidth of 540 nm with a confinement loss less than 0.1 dB km−1, the broadest bandwidth to the best of our knowledge. Moreover, the structure that we proposed can realize a high nonlinear coefficient. Keywords: photonic crystal fibersingle-polarization single-modenonlinear coefficientconfinement lossplane wave expansion method (PWEM) Acknowledgements Project supported by the National Natural Science Foundation of China (Nos. 10904080, 60708002), the Distinguished Middle-aged and Young Scientist Encourage and Reward Foundation of Shandong Province, China (No. BS2011DX007), and by the State Key Laboratory of Transient Optics and Photonics (No. SKLST201012).