Song Minje, Han Sang-Pil, Park Jaegyu, Choi Hyunjong, Kim Sungil, Tran Thanh Tuan, Kim Hyun Deok, Song Minhyup
Opt Express. 2021 Apr 12;29(8):12001-12009. doi: 10.1364/OE.421876.
We present the flat-top supercontinuum source with high repetition rate over a broad bandwidth. The flatness and high repetition rate are achieved by iterative optical line-by-line spectrum shaping on electro-optic optical frequency combs. By applying Gaussian apodized pulse train to a highly nonlinear medium with optimized Gaussian coefficient and nonlinear polarization rotation techniques, we implemented here a flat-top supercontinuum with a 47.7 nm bandwidth at 3 dB and 30 GHz repetition rate. The generation of high repetition rate supercontinuum sources with smooth and coherent spectrum is the critical challenging task for many applications such as optical communications and the optical arbitrary waveform generation. This work leads us to new possibilities for generating hundreds or thousands of flattened coherent optical carriers with a simple configuration.
我们展示了一种在宽频带上具有高重复率的平顶超连续谱源。通过对电光光学频率梳进行逐行迭代光谱整形，实现了平坦度和高重复率。通过将高斯切趾脉冲序列应用于具有优化高斯系数的高非线性介质，并采用非线性偏振旋转技术，我们在此实现了一种平顶超连续谱，其在3dB处带宽为47.7 nm，重复率为30 GHz。对于光通信和光任意波形产生等许多应用而言，生成具有平滑且相干光谱的高重复率超连续谱源是一项极具挑战性的关键任务。这项工作为通过简单配置生成数百或数千个平坦化相干光载波带来了新的可能性。
