Nested long period grating interferometers

摘要

The concept of nested fibre optic long period grating (LPG) basedinterferometers is introduced. A number of in-series, identical LPGs may be usedto form a set of nested, multiplexed Mach-Zehnder interferometers that maydemodulated and demultiplexed by virtue of a Fourier analysis of the opticalspectrum. The concept is demonstrated by the use of three LPGs to form a nestedset of interferometers.