基于微纳光纤的黑磷全光调制和波长转换研究

发布时间：2018-04-25 12:02

本文选题：黑磷 + 微纳光纤　；参考：《深圳大学》2017年硕士论文

【摘要】：新型二维材料黑磷自从被发现以来,由于其独特的二维结构及光电特性,已经受到了广大研究者的关注。值得注意的是,黑磷是一种极具潜力的超紧凑非线性光学介质,其具有优异的非线性系数。本文在实验上利用光沉积法成功制备出黑磷-微纳光纤复合结构,这种复合结构就是将黑磷的优异非线性效应(饱和吸收、光克尔效应)和微纳光纤自身的优势相结合,并在实验上此复合结构在全光纤系统中实现全光调制和波长转换。由于黑磷-微纳光纤复合结构具有饱和吸收效应,使得该非线性器件在全光纤系统中可用于实现全光调制及全光阈值。当黑磷-微纳光纤复合结构作用于全光纤系统时,该器件不但可通过泵浦光的强弱来调节信号的开/关状态,而且可用于提高信号的信噪比,实现了光调制器的消光比为4.7,以及光阈值器将脉冲信号的信噪比从3.54提高至17.5,光阈值器件的使用有助于进一步提高全光调制的质量。该器件可与全光纤系统无缝融合,有望在未来的全光网络中得到广泛应用。本文通过黑磷与微纳光纤波导相结合,成功在器件中观察到交叉相位调制以及四波混频现象,实现了消光比可达到26dB,波长工作转换范围为18nm以上的全光克尔光开关。同时实验结果表明本文所研究的黑磷新型二维材料具有优良的非线性光学效应,在全光纤系统中实现在通信波段的波长转换、光学信号的产生以及微型光电器件等方面具有巨大的应用和发展前景。
[Abstract]:Black phosphorus, a new two-dimensional material, has attracted much attention since it was discovered because of its unique two-dimensional structure and optoelectronic properties. It is worth noting that black phosphorus is a potential ultra-compact nonlinear optical medium with excellent nonlinear coefficients. In this paper, the black phosphorus-micro-nano fiber composite structure has been successfully fabricated by photodeposition method. This composite structure combines the excellent nonlinear effect (saturation absorption, optical Kerr effect) of black phosphorus with the superiority of micro-nano fiber itself. Experimental results show that the composite structure can realize all-optical modulation and wavelength conversion in all-fiber systems. Due to the saturation absorption effect of the black phosphorus-micro-nano fiber composite structure, the nonlinear device can be used to realize all-optical modulation and all-optical threshold in all-fiber system. When the composite structure of black phosphorus-micro-nano fiber acts on the all-fiber system, the device can not only adjust the on / off state of the signal by the intensity of the pump light, but also improve the signal-to-noise ratio of the signal. The extinction ratio of the optical modulator is 4.7 and the signal to noise ratio of the pulse signal is increased from 3.54 to 17.5 by the optical threshold device. The use of the optical threshold device can further improve the quality of all-optical modulation. The device can be seamlessly integrated with all optical fiber systems, and it is expected to be widely used in all optical networks in the future. In this paper, the cross phase modulation and four wave mixing phenomena have been observed successfully in the device by combining black phosphorus with micro and nano fiber waveguide. The extinction ratio can reach 26 dB and the wavelength conversion range is above 18nm. At the same time, the experimental results show that the novel two dimensional black phosphorus material studied in this paper has excellent nonlinear optical effect, and the wavelength conversion in the communication band is realized in all optical fiber systems. The generation of optical signals and micro optoelectronic devices have great application and development prospects.
【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN253;TN761

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