Frequency tunable polarization and intermodal modulation instability in high birefringence holey fiber.
Frequency tunable polarization and intermodal modulation instability in high birefringence holey fiber.
复制标题
高双折射多孔光纤中的频率可调偏振和模间调制不稳定性。
作者：
A. Tonello;S. Pitois;Stefan Wabnitz;Guy Millot;T. Martynkien;W. Urbańczyk;Jan Wojcik;A. Locatelli;Matteo Conforti;C. Angelis
本文对双折射多孔光纤的偏振和多模态噪声种子参量放大进行了实验分析，其中色散是通过偏振模式或空间模式之间的群速度不匹配进行相位匹配的。通过注入与光纤偏振轴平行或45度的准连续强线极化泵浦脉冲，我们观察到同时产生偏振或多模态调制不稳定边带。此外，通过将泵浦波长从532 nm移至625 nm，我们观察到极化边带从3太赫兹移至8太赫兹，而多模态边带从33太赫兹移至63太赫兹。这些观测结果与各自光纤模式的相速度和群速度的实验表征和理论估计非常吻合。
We present an experimental analysis of polarization and intermodal noise-seeded parametric amplification, in which dispersion is phase matched by group velocity mismatch between either polarization or spatial modes in birefringent holey fiber with elliptical core composed of a triple defect. By injecting quasi-CW intense linearly polarized pump pulses either parallel or at 45 degrees with respect to the fiber polarization axes, we observed the simultaneous generation of polarization or intermodal modulation instability sidebands. Furthermore, by shifting the pump wavelength from 532 to 625 nm, we observed a shift of polarization sidebands from 3 to 8 THz, whereas intermodal sidebands shifted from 33 to 63 THz. These observations are in excellent agreement with the experimental characterization and theoretical estimates of phase and group velocities for the respective fiber modes.