Olivier Michel, Piché Michel
Opt Express. 2016 Feb 8;24(3):2336-49. doi: 10.1364/OE.24.002336.
Erbium-doped mode-locked fiber lasers with repetition rates comparable to those of solid-state lasers and generating nJ pulses are required for many applications. Our goal was to design a fiber laser that would meet such requirements, that could be built at relatively low cost and that would be reliable and robust. We thus developed a high-fundamental-repetition-rate erbium-doped all-fiber laser operating in the amplifier similariton regime. Experimental characterization shows that this laser, which is mode-locked by nonlinear polarization evolution, emits 76-fs pulses with an energy of 1.17 nJ at a repetition rate of 100 MHz. Numerical simulations support the interpretation of self-similar evolution of the pulse in the gain fiber. More specifically we introduce the concept of vector similariton in fiber lasers. The coupled x- and y- polarization components of such a pulse have a pulse profile with a linear chirp and their combined power profile evolves self-similarly when the nonlinear asymptotic regime is reached in the gain fiber.
许多应用都需要重复频率与固态激光器相当且能产生纳焦脉冲的掺铒锁模光纤激光器。我们的目标是设计一种满足此类要求、能以相对较低成本制造且可靠耐用的光纤激光器。因此，我们开发了一种在放大器类孤子 regime 中运行的高基频重复频率掺铒全光纤激光器。实验表征表明，这种通过非线性偏振演化锁模的激光器，在100 MHz的重复频率下发射能量为1.17 nJ的76飞秒脉冲。数值模拟支持了增益光纤中脉冲自相似演化的解释。更具体地说，我们引入了光纤激光器中矢量类孤子的概念。这种脉冲的x和y偏振耦合分量具有线性啁啾的脉冲轮廓，当增益光纤中达到非线性渐近 regime 时，它们的组合功率轮廓会自相似演化。
