Stretched-pulse generation in all-fiber mode-locked erbium-doped fiber laser using Lawsone dye saturable absorber

• Main Authors: Soboh, Rawan S.M., Al-Masoodi, Ahmed H.H., Apsari, Retna, Erman, Fuad. N.A., Al-Masoodi, Ab. H.H., Arof, Hamzah, Harun, Sulaiman Wadi
• Format: Article
• Published: Elsevier 2021
• Subjects: QC Physics; TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/36058/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126666015&doi=10.1016%2fj.rio.2021.100148&partnerID=40&md5=7b8093d24eb8976369904744f9577590; https://doi.org/10.1016/j.rio.2021.100148
• Institution: Universiti Malaya

This paper describes the generation of mode locked pulses by an erbium-doped fiber laser (EDFL) cavity with a Lawsone dye saturable absorber (SA). The Lawsone SA is made of a piece of thin film, which is obtained using a liquid-phase exfoliation method. Characterization of the film reveals that its saturation intensity and modulation depth are 2.9 MW/cm2 and 12 respectively. When the Lawsone SA is added to the EDFL cavity, a stable mode-locked pulse train is achieved at 1567.5 nm wavelength. The laser operates within a pump power of 33.6 mW to 43.3 mW at a repetition rate of 3.4 MHz and pulse width of 1.47 ps. The results indicate that the Lawsone dye can be used as a SA for laser pulse generation. © 2021