Harith Ahmad, Bilal Nizamani, Muhamad Zharif Samion, Zamri Radzi, Shufeng Sun
In this work, the potential of arrayed waveguide gratings (AWGs) in ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) fibers to produce a dual-wavelength fiber laser (DWFL) is presented, covering the O- and S- communication bands. These DWFLs are rarely reported, and this is the first demonstration in these bands using AWGs and ZBLAN fibers with dopants such as praseodymium and thulium. The O-band DWFL was achieved in a praseodymium-doped fluoride fiber laser (PDFFL), and the S-band DWFL was obtained in thulium-doped fluoride fiber lasers (TDFFLs). The dual wavelength with a wavelength spacing of 2.7 nm was generated at operating wavelengths of 1307.4 and 1310.1 nm in the O-band. Meanwhile, the S-band DWFL was generated at operating wavelengths of 1503.6 and 1505.9 nm, with a wavelength spacing of 2.3 nm. The two DWFLs were switched by changing AWG channels within the PDFFL and TDFFL cavities. The O-band and S-band DWFLs were switchable at wavelength spacings of 2.7-22.8 nm and 2.3-20.8 nm, respectively. These DWFLs in communication bands provide opportunities for possible applications in dense wavelength division multiplexing high-speed optical networks. © 2024 Astro Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.
Photonics Research Centre, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Physics Department, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Department of Physics, Faculty of Mathematics and Natural Sciences, Malang State University, Jalan Semarang 5, Malang, 65145, Indonesia; Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Collaborative Innovation Center for Green Intelligent Laser Manufacturing Technology and Equipment of Shandong Province, School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao, 266520, China