.Bidirectional single-mode Er-doped fiber ring laser[J].Optoelectronics Letters,2007,3(1):34-36 Bidirectional single-mode Er-doped fiber ring laser QIAN Jing-ren SU Jue WANG Xu-xu ZHU Bing Department of Electronics Engineering and Information Science, University of Science and Technology of China, Hefei 230026, China Abstract:       A direction related polarizer (DRP) was used in a laser cavity to eliminate spatial hole burning of gain medium in a bidirectional Er-doped fiber ring laser. A stable operation of single longitudinal mode was achieved with comparable intensities for both clockwise and counterclockwise direction. A beat signal of 30 dB over noise was observed. This laser used as a gyroscope was demonstrated and a good linear relation between the beat frequency shift and the cavity rotation rate was acquired. Hits: 3574 Download times: 213 View Full Text    Download reader