Nonlinear Absorption Properties of Cr 2 Ge 2 Te 6 and Its Application as an Ultra-Fast Optical Modulator

In this manuscript, the nonlinear absorption properties of Cr Ge Te 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...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2019-05, Vol.9 (5)
Main Authors: Ma, Peng-Fei, Lin, Wei, Zhang, Hua-Nian, Xu, Shan-Hui, Yang, Zhong-Min
Format: Article
Language:English
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Summary:In this manuscript, the nonlinear absorption properties of Cr Ge Te 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 Cr Ge Te 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 Cr Ge Te 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 Cr Ge Te .
ISSN:2079-4991
2079-4991