Yi Duo, Huang Zhewen, Fu Wenqiang, Geng Youfu, Liu Fei, Li Xuejin
Opt Lett. 2023 Sep 1;48(17):4456-4459. doi: 10.1364/OL.498652.
This study proposes an all-optical phase modulator based on a compact fiber optic interferometer combined with TiCT MXene-incorporated PDMS. Due to the high photothermal conversion efficiency of MXene and the high thermo-optic coefficient of PDMS, changes in pump power can be effectively converted into refractive index (RI) variations in the PDMS. Then, by employing a fiber optic interferometer with a high RI response, ultra-sensitive all-optical phase modulation can be realized. The experimental results demonstrate that the resonant wavelength shift of the modulator with MXene-incorporated PDMS is 126 times higher than that of a modulator with single MXene deposition. Also, a maximum wavelength sensitivity of 14.57 nm/mW is achieved (equivalent to a phase sensitivity of 0.33π/mW); this excellent modulation performance is a great improvement on that of a previously reported fiber-based all-optical phase modulator. Furthermore, PDMS is also employed as a packaging layer to strengthen the device structure and restrict the heat in an enclosed space, which improves the heat utilization efficiency. The proposed device shows great potential in optical communication, optical filtering, sensing, and modulation applications.
本研究提出了一种基于紧凑型光纤干涉仪与掺入TiCT MXene的聚二甲基硅氧烷（PDMS）相结合的全光相位调制器。由于MXene的高光热转换效率和PDMS的高热光系数，泵浦功率的变化可以有效地转换为PDMS中的折射率（RI）变化。然后，通过采用具有高RI响应的光纤干涉仪，可以实现超灵敏的全光相位调制。实验结果表明，掺入MXene的PDMS调制器的共振波长偏移比仅沉积MXene的调制器高126倍。此外，实现了14.57 nm/mW的最大波长灵敏度（相当于0.33π/mW的相位灵敏度）；这种优异的调制性能比先前报道的基于光纤的全光相位调制器有了很大的提高。此外,PDMS还用作封装层，以加强器件结构并将热量限制在封闭空间内，从而提高热利用效率。所提出的器件在光通信、光滤波、传感和调制应用中显示出巨大潜力。
