PDF(Pubmed)
Abstract：
We report a thin-film optical amplifier integrated on a fiber facet based on polymer-coated distributed feedback (DFB) microcavities, which are fabricated on a planar substrate and then transferred onto fiber tips by means of a flexible transfer technique. The amplified light directly couples into the fiber and is detected when coupled out at the other end after propagating along the fiber for about 20 cm. A prominently amplification factor of about 4.33 at 578.57 nm is achieved by sending supercontinuum pulses into the hundreds of micrometers\' DFB microcavities along the normal direction, which is also the axis direction of the fiber. The random distortions of grating lines generated during the transfer process result in a larger amplification spectral range and a less strict polarization dependence for injected light. Benefitting from the device size of hundreds of micrometers and the ease of integration, polymer amplifiers based on DFB microcavities demonstrate significant application potentials in optical communication systems and miniaturized optical devices.
摘要：
我们报告了一种基于聚合物涂层的分布反馈（DFB）微腔集成在光纤面上的薄膜光学放大器，在平面衬底上制造，然后通过柔性转移技术转移到光纤尖端上。放大的光直接耦合到光纤中,并且在沿着光纤传播约20cm之后在另一端耦合输出时被检测到。通过沿法线方向将超连续谱脉冲发送到几百微米的DFB微腔中，在578.57nm处实现了约4.33的显著放大因子，这也是纤维的轴方向。在转移过程期间产生的光栅线的随机畸变导致较大的放大光谱范围和对于注入光的较不严格的偏振依赖性。受益于数百微米的器件尺寸和易于集成，基于DFB微腔的聚合物放大器在光通信系统和小型化光学器件中具有重要的应用潜力。
