采用等离子体增强化学气相沉积法, 通过设置等离子体发生器的功率和生长时间来控制石墨烯的层数, 生长出了高质量和高透明度的石墨烯; 将3.7 nm厚度的石墨烯(约11层)涂覆在倾斜角度为8°的光纤光栅上进行实验, 测得光栅在折射率1.33附近的灵敏度达到－1.57161 RIU-1, 与未镀石墨烯的光栅相比, 灵敏度约提高20倍。在光纤光栅表面涂覆石墨烯可明显提高倾斜光栅在低折射率区域的灵敏度, 在生物、化学、食品安全和水环境监测等领域具有潜在应用价值。

We use plasma enhanced chemical vapor deposition (PECVD) to grow graphene with high quality and high transparency by setting the power of plasma generator and growth time to control the layer number of graphene. In the experiment, a fiber Bragg grating with a tilted angle of 8° is coated graphene with thickness of 3.7 nm (about 11 layers). Near the low refractive index region of 1.33, the titled-fiber Bragg grating (TFBG) has a high refractive index sensitivity of －1.57161 RIU-1, and its sensitivity is about 20 times of the sensitivity of TFBG without coating graphene. The way of coating graphene on TFBG can significantly increase the sensitivity of TFBG in the low refractive index region, and the TFBG coated graphene has potential application in the fields of biology, chemisty, food safety, and monitoring of water-environment.