Thermal characterization of type I and Type II polymer optical fiber Bragg gratings

Abstract

Two different types of POF gratings, named as Type I and Type I POF gratings, have been distinctively identified in our previous report. Thermal characterization for Type I and Type II POF gratings is carried out in this paper. Our investigation shows that the thermal sensitivity for Type I and Type II POF gratings are the same, while Type II are more thermally stable than Type I POF gratings. Furthermore, it is also demonstrated that POF gratings have much better thermal tunability and higher thermal sensitivity than that of silica fiber gratings