Facultad de Ingeniería Civil, Universidad Nacional de Ingeniería, Avenida Tupac Amaru 210, El Rimac,PE-Lima 025 Lima, Peru.
Opt Lett. 2010 Feb 15;35(4):613-5. doi: 10.1364/OL.35.000613.
We present an optical fiber refractometer based on a Fabry-Perot interferometer defined by two fiber Bragg gratings and an intracavity long-period grating that makes the light confined in the resonator interact with the surrounding medium. The external refractive index is monitored by the resonant frequencies of the Fabry-Perot interferometer, which can be measured either in transmission or in reflection. In this first experiment, wavelength shifts measured with a resolution of 0.1 pm have allowed one to establish a refractive index detection limit of 2.1x10(-5).
我们提出了一种基于光纤法布里-珀罗干涉仪的光纤折射计，该干涉仪由两个光纤布拉格光栅和一个腔内长周期光栅定义，使光限制在谐振腔内并与周围介质相互作用。外部折射率通过法布里-珀罗干涉仪的谐振频率进行监测，该谐振频率可以在透射或反射中进行测量。在这个首次实验中，通过分辨率为 0.1 pm 的波长位移测量，已经能够建立 2.1x10(-5) 的折射率检测极限。
