Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7930349 | Optics Communications | 2015 | 4 Pages |
Abstract
A novel fiber optic temperature sensor has been proposed and experimentally demonstrated with ~9 times sensitivity enhancement by using two cascaded Sagnac interferometers. These two Sagnac interferometers consist of the same type of polarization maintaining fibers with slightly different lengths. The working principle is analogous to a Vernier scale. One interferometer acts as filter, while the other is for temperature sensing. The envelope of the cascaded sensor shifts much more than single one with a certain enhancement factor, which related to the free space range difference between the filter and sensor interferometers. Experimental results show that the temperature sensitivity is enhanced from â1.46 nm/°C based on single Sagnac configuration to â13.36 nm/°C.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Li-Yang Shao, Yuan Luo, Zhiyong Zhang, Xihua Zou, Bin Luo, Wei Pan, Lianshan Yan,