Kim, Byungjoo Ghasemi, Marjan Lee, Yong Soo Lee, Mingyu Kim, Seokjin Oh, Kyunghwan 2024-01-19T09:32:11Z 2024-01-19T09:32:11Z 2023-04-06 2023-06 0022-2313 https://pubs.kist.re.kr/handle/201004/113716 We experimentally demonstrated a tunable microsecond passively Q-switched fiber laser using deionized water (DIW) as a saturable absorber (SA). The DIW-SA was integrated into an all-fiber device by filling the gap between two cleaved fiber facets with DIW, which were enclosed in a glass ferrule. We observed a high nonlinear transmission through DIW-SA and implemented it in an erbium-doped fiber ring laser cavity. Microsecond Q-switched pulse trains were produced tunable from 1564.3 to 1603.4 nm using a fiber-optic Fabry-Perot interference filter within the cavity, avoiding peak water absorption while maintaining stable operation. Tunable and robust Q-switching of a fiber laser using water would open a new avenue of nonlinear aqua-photonics. English Elsevier BV Tunable microsecond Q-switched fiber laser using an all-fiber deionized water saturable-absorber Article 10.1016/j.jlumin.2023.119773 1 Journal of Luminescence, v.258 Journal of Luminescence 258 N scie scopus 000952527000001 2-s2.0-85150025682 Optics Optics Article GENERATION PULSES