2024/09/09 by H. Ahmad, K. Kamaruzzaman, Khalil Kamaruzzaman +2
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Condensed matter physics #Doping #Fiber laser #Holmium #Laser #Materials science #Mode-locking #Nonlinear Photonic Systems #Optics #Optoelectronics #Photonic Crystal and Fiber Optics #Physics #Q-switching #Saturable absorption #Topological insulator
paper · doi:10.1109/jqe.2024.3456073
openalex publication_date 2024/09/09 · openalex created_date 2024/09/10 · openalex updated_date 2026/08/01
This work demonstrates mode-locking and Q-switching in a holmium-doped fiber laser (HDFL) using topological insulator (TI) antimony telluride (Sb2Te3) as the saturable absorber (SA). The TI was drop-casted on an arc-shaped fiber to generate mode-locked pulses and used in thin-film form to generate Q-switched pulses. The mode-locked pulses obtained were centered at 2081.1 nm with a repetition rate of 13.4 MHz, signal-to-noise ratio of 42 dB, and 1.85 ps pulse width. The Q-switched pulses were generated at the center wavelength of 2086.3 nm within the pump power of 1.55 W until 1.80 W. Within this range, the repetition rate peaked at 50.76 kHz and the pulse width dropped to a minimum value of2.64~μ s. To the best of the author’s knowledge, this is the first work to use a topological insulator in an HDFL to generate both mode-locked and Q-switched pulses.