Aeriyn D. Ahmad, Bilal A. Ahmad, Masruroh, Norrima Mokhtar, Denny Haryanto Sinaga, Sulaiman W. Harun
We present a Q-switched neodymium-doped fiber laser (NDFL) that employs a polyaniline (PANI) saturable absorber (SA) in an all-fiber configuration. The NDFL generated stable Q-switched pulses, achieving a minimum pulse duration of 5.31 µs and a maximum repetition rate of 35.2 kHz. Operating at 1089.2 nm, the laser produced pulse energies of 3.72 nJ at a maximum pumping of 141.4 mW at 808 nm. The output demonstrated remarkable stability, with a signal-to-background noise ratio of 52 dB at the main frequency. This work represents the first demonstration of a PANI-based Q-switched NDFL operating in the one-micron wavelength region. ©2025 Old City Publishing, Inc.
Photonics Engineering Laboratory, Department of Electrical Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia; Information Institute for Postgraduate Studies, University of Information Technology and Communications, Baghdad, Iraq; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, Malang, 65145, Indonesia; Department of Electrical Engineering Education, Faculty of Engineering, Universitas Negeri Medan, Medan, Indonesia
