Rivas Luis M, Boudreau Sylvain, Park Yongwoo, Slavík Radan, Larochelle Sophie, Carballar Alejandro, Azaña José
Institut National de la Recherche Scientifique-Energie, Matériaux et Télécommunications (INRS-EMT), Montréal, Québec H5A 1K6, Canada.
Opt Lett. 2009 Jun 15;34(12):1792-4. doi: 10.1364/ol.34.001792.
We propose and demonstrate what we believe to be a new, simple, and compact all-fiber design for arbitrary-order ultrafast optical temporal differentiation. The proposed design allows us to implement any desired differentiation order using a maximum of two concatenated fiber gratings, both operating in transmission. A single specially apodized chirped fiber Bragg grating is required for implementing any even-order differentiator, whereas the immediately next odd-order differentiator can be implemented by concatenating a long-period fiber-grating first-order differentiator. Besides its simplicity, this scheme provides an optimized energetic efficiency. We experimentally demonstrate a set of high-order all-optical time differentiators (up to the fourth order) capable of accurately processing arbitrary optical waveforms with picosecond time features.
我们提出并展示了一种全新的、简单且紧凑的全光纤设计，用于任意阶超快光学时间微分。该设计使我们能够通过最多两个串联的光纤光栅来实现任何所需的微分阶数，这两个光栅均工作在透射模式。实现任何偶数阶微分器需要一个专门切趾的啁啾光纤布拉格光栅，而紧接着的奇数阶微分器可以通过串联一个长周期光纤光栅一阶微分器来实现。除了简单之外，该方案还具有优化的能量效率。我们通过实验展示了一组高阶全光时间微分器（最高到四阶），它们能够精确处理具有皮秒时间特征的任意光波形。
