[20a-PA2-1~11] 3.5 Laser system and materials

▲ [20a-PA2-9] Investigation of self-wavelength sweeping in thulium-doped fiber ring laser

〇Jiang Hongbo¹, Zihao Zhao¹, Pengtao Yuan¹, Lei Jin¹, Sze Yun Set¹, Shinji Yamashita¹ (1.Tokyo Univ.)

Keywords:fiber laser, swept laser

The phenomenon of self-wavelength sweeping in bi-directional thulium-doped fiber ring laser is investigated in this paper. The laser wavelength can sweep at a rate up to 0.2 nm/s over 15 nm range in the 1950 nm region spontaneously. The sweeping rate can be controlled by changing the state of polarization (SOP) of the laser cavity. The investigation reveals the impact of mode-coupling theory on laser output behavior, we believe that it is helpful for research on bi-directional fiber laser and fiber ring laser gyroscope (FRLG).