Applications of single frequency fiber lasers

In this paper we address fiber Bragg Grating (FBG) based fiber lasers, which consist of a rare earth single mode fiber with a FBG imposed in the fiber. The rare earth doped optical fiber is typically pumped with a semiconductor pump. These laser sources further exhibits extremely narrow spectral linewidth in the order of kHz and very low phase noise in the low frequency area making the single frequency fiber laser very attractive for many coherent applications such as interferometry, mid infrared generation, absolute reference sources, coherent communication, LIDAR and, due to the capability to be used in harsh environments, for down the well applications measuring pressure and temperature.