Controllable Growth of Graphene Photonic Crystal Fibers with Tunable Optical Nonlinearity

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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ACS Photonics, Volume 9, issue 3
The graphene photonic crystal fiber (Gr-PCF), with graphene coated onto the inner hole walls of the fiber, has shown its superiority in various photonic and optoelectronic applications ranging from electro-optic modulators to environmental sensors. However, these applications mainly utilize the linear optical properties of graphene, and its potentials in the nonlinear optical regime are still waiting to be explored. As for the nonlinear applications, the structure and property of Gr-PCF must be precisely manipulated for the tradeoff between nonlinear enhancement and linear absorption loss of graphene. Here, we propose a pressure-controllable chemical vapor deposition strategy to precisely control the uniform fiber length and graphene thickness, realizing the strong and tunable optical nonlinearity of Gr-PCF with acceptable optical loss. Based on the as-fabricated fiber, the nonlinear harmonic generations exhibit nearly one order of magnitude enhancement compared with those of graphene on planar quartz. Moreover, an ultrafast all-fiber laser employing the nonlinear Gr-PCF as a saturable absorber is demonstrated with ∼8 mW output power, ∼2 ps pulse width, and ∼37 MHz repetition frequency. Our results can technically open up an infusive way to precisely engineer the nonlinear properties of graphene optical fibers and broaden their applications in all-fiber photonic and optoelectronic devices.
Funding Information: This work was supported by the Beijing National Laboratory for Molecular Sciences (BNLMS- CXTD-202001), Beijing Municipal Science & Technology Commission (Z181100004818003, Z201100008720006, and Z191100000819003), the National Natural Science Foundation of China (52025023, 51991342, 52021006, and 11888101), the Strategic Priority Research Program of Chinese Academy of Sciences (XDB33000000), the Key R&D Program of Guangdong Province (2020B010189001, 2019B010931001, and 2018B030327001), Pearl River Talent Recruitment Program of Guangdong Province (2019ZT08C321), Beijing Natural Science Foundation (JQ19004), Zhongyuan Thousand Talents Program of Henan Province, and National Top-notch Young Talents of Ten Thousand Talents Program. Publisher Copyright: © 2022 American Chemical Society.
all-fiber laser, graphene, nonlinear harmonic generation, optical fiber, pressure-controllable chemical vapor deposition
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Cheng , Y , Yu , W , Xie , J , Wang , R , Cui , G , Cheng , X , Li , M , Wang , K , Li , J , Sun , Z , Chen , K , Liu , K & Liu , Z 2021 , ' Controllable Growth of Graphene Photonic Crystal Fibers with Tunable Optical Nonlinearity ' , ACS Photonics , vol. 9 , no. 3 , pp. 961–968 .