CrGeTe的非线性吸收特性及其作为超快光调制器的应用。

Nonlinear Absorption Properties of CrGeTe and Its Application as an Ultra-Fast Optical Modulator.

作者信息

Ma Peng-Fei, Lin Wei, Zhang Hua-Nian, Xu Shan-Hui, Yang Zhong-Min

机构信息

State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China.

Shandong Provincial Key Laboratory of Optics and Photonic Devices, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.

出版信息

Nanomaterials (Basel). 2019 May 23;9(5):789. doi: 10.3390/nano9050789.

DOI:10.3390/nano9050789

PMID:31126051

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6566383/

Abstract

In this manuscript, the nonlinear absorption properties of CrGeTe and its application in ultra-fast optical modulation are investigated. Typical parameters, namely, nonlinear absorption coefficient (β), saturation intensity, and modulation depth are measured to be ~1.66 × 10 m/W, 15.3 MW/cm, and 5.8%, respectively. To investigate the feasibility of using the CrGeTe as an ultra-fast optical modulator, a ring-cavity passively mode-locked Er-doped fiber laser has been constructed. The output power/pulse, duration/pulse, and repetition rate/signal-to-noise ratios for the stable mode-locked operation are 2.88 mW/881 fs/19.33 MHz/48 dB, respectively, which proves that the CrGeTe has outstanding nonlinear optical properties and advantages in performing as an ultra-fast optical modulator. Further, the experimental results provide valuable references and open new avenues for developing two-dimensional, material-based, ultra-fast optical modulators and advanced photonic devices based on CrGeTe.

摘要

在本论文中，研究了CrGeTe的非线性吸收特性及其在超快光调制中的应用。测量了典型参数，即非线性吸收系数(β)、饱和强度和调制深度，分别为~1.66×10 m/W、15.3 MW/cm和5.8%。为了研究将CrGeTe用作超快光调制器的可行性，构建了一个环形腔被动锁模掺铒光纤激光器。稳定锁模运行时的输出功率/脉冲、持续时间/脉冲和重复率/信噪比分别为2.88 mW/881 fs/19.33 MHz/48 dB，这证明CrGeTe在用作超快光调制器方面具有出色的非线性光学特性和优势。此外，实验结果为开发基于CrGeTe的二维、基于材料的超快光调制器和先进光子器件提供了有价值的参考，并开辟了新途径。