Polarisation-sensitive four-wave mixing and soliton self-frequency shift effect in the highly birefringent photonic crystal fibre |
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| Authors: | Yuan Jin-Hui Sang Xin-Zhu Yu Chong-Xiu Xin Xiang-Jun Li Shu-Guang Zhou Gui-Yao and Hou Lan-Tian |
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| Affiliation: | Key Laboratory of Information Photonics and Optical Communications, Ministry of Education, Institute of Optical Communication and Optoelectronics, Beijing University of Posts and Telecommunications, Beijing 100876, China; Institute of Infrared Optical Fibers and Sensors, College of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China |
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| Abstract: | By adjusting the polarisation state of the pump at 805 nm parallel to slow (x) and fast (y) axes of the highly birefringent photonic crystal fibre with zero dispersion wavelengths 790 nm and 750 nm, this paper demonstrates the efficient polarisation-sensitive four wave mixing involved in pump, anti-Stokes and Stokes signals and soliton self-frequency shift effects induced by the phase-matching between red-shifted solitons and blue-shifted dispersive waves. If the reduction of coupling efficiency to the circular pump laser mode or other circular fibres due to asymmetry of the core is neglected, more than 98% of the total input power is kept in a single linear polarisation. Controlled dispersion characteristic of the doublet of fundamental guided-modes results in achieving light field strongly confined in principal axes of photonic crystal fibre, and enhancing the corresponding nonlinear-optical process through the remarkable nonlinear birefringence. |
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| Keywords: | highly birefringent photonic crystal fibre four wave mixing soliton self-frequency shift phase-matching |
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