A high sensitivity refractometer based upon a long period grating Mach-Zehnder interferometer

作者：Allsop T^*; Reeves R; Webb DJ; Bennion I; Neal R

来源：Review of Scientific Instruments, 2002, 73(4): 1702-1705.

DOI：10.1063/1.1459093

A low cost interrogation scheme is demonstrated for a refractometer based on an in-line fiber long period grating (LPG) Mach-Zehnder interferometer. Using this interrogation scheme the minimum detectable change in refractive index of Deltansimilar to1.8x10(-6) is obtained, which is the highest resolution achieved using a fiber LPG device, and is comparable to precision techniques used in the industry including high performance liquid chromatography and ultraviolet spectroscopy.

• 出版日期2002-4