Using a fiber Bragg grating (FBG) and a Fabry-Perot cavity composed of two fiber Bragg gratings (FBGFP) as its frequency-selective components, a type of single frequency all-fiber ring laser permits oscillation only on one longitudinal mode of the main cavity without modehopping while the cavity length can be up to tens of meters. The salient feature is due to the single narrowband resonance of the FBGFP filter. Such a fiber ring laser is achieved experimentally, and the laser mode is limited inside the single resonance of the FBGFP.
© 2005 Chinese Optics Letters
Changgui Lv, Zhuyuan Wang, Binfeng Yun, and Yiping Cui, "Stable single frequency Er-doped all-fiber ring laser with fiber Bragg grating Fabry-Perot filter," Chin. Opt. Lett. 3, 212-214 (2005)