Xiao Peng, Liu Tong, Feng Fu-Rong, Sun Li-Peng, Liang Hao, Ran Yang, Jin Long, Guan Bai-Ou
Opt Express. 2016 Dec 26;24(26):29749-29759. doi: 10.1364/OE.24.029749.
Chirped fiber Bragg gratings can straightforwardly and efficiently be fabricated onto microfibers with a uniform phase mask. Due to the variation of the propagating constant, which depends on the fiber diameter, the broadband spectrum of the grating can be formed. Depending on the different responses to the ambient refractive index in different parts of the grating, the bandwidth of the grating can be tuned by changing the surrounding solution. In addition, by being partly immersed in a liquid, the diameter-chirped Bragg grating can act as a broadband Fabry-Perot interferometer, whose spectrum can be tuned by means of controlling the liquid level and ambient refractive index.
啁啾光纤布拉格光栅可以通过均匀相位掩模直接且高效地制备在微纤维上。由于传播常数的变化取决于光纤直径，因此可以形成光栅的宽带光谱。根据光栅不同部分对环境折射率的不同响应，可以通过改变周围溶液来调节光栅的带宽。此外，通过部分浸入液体中，直径啁啾布拉格光栅可以充当宽带法布里 - 珀罗干涉仪，其光谱可以通过控制液位和环境折射率来调节。
