No abstract

In this paper a polarization-independent all-fiber multiwavelength-switchable filter based on a polarization-diversity loop configuration is newly proposed. The proposed apparatus consists of a polarization beam splitter, high birefringence fibers, and polarization controllers. Our theoretical analysis shows that the apparatus exhibits unique feature which allows it to operate as a polarization-independent multiwavelength periodic filter with a good channel isolation and to make its channel wavelength switchable by varying effective birefringence of the polarization-diversity loop through the proper adjustment of the polarization controllers contained within the loop. Theoretical prediction was experimentally verified.

No abstract

A new fiber-optic-sensing scheme capable of performing a simultaneous measurement of strain and temperature has been developed using a long-period fiber grating (LPG) inscribed on a high-birefringent fiber (HBF), which is ended with a Faraday rotator mirror (FRM). By incorporating the FRM following the LPG inscribed on the HBF (HB-LPG), the number of spectral scans can be reduced to only one and the potential drawbacks due to the use of the polarized light source can also be completely removed, as compared with a previous system based on a single HB-LPG.

No abstract