A direction related polarizer was inserted into a ring laser cavity to eliminate one of the two eigen-modes as well as spatial hole burning of the gain medium in a bidirectional Er-doped fiber ring laser. Thus, a fiber ring laser gyroscope (FRLG) operating in continuous wave was demonstrated. A beat signal of over 30-dB noise was observed and a good linear relation between the beat frequency shift and cavity rotation rate was obtained.
© 2007 Chinese Optics Letters
(140.3370) Lasers and laser optics : Laser gyroscopes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3560) Lasers and laser optics : Lasers, ring
(280.3420) Remote sensing and sensors : Laser sensors
Jingren Qian, Jue Su, Xuxu Wang, and Bing Zhu, "Er-doped fiber ring laser gyroscopes operating in continuous waves," Chin. Opt. Lett. 5, 229-231 (2007)