Dual-wavelength thulium ytterbium Co-doped fiber laser

• Main Authors: Haris, Hazlihan, Muhammad, Ahmad Razif, Saidin, Norazlina, Zainal Abidin, Mohd. Shahnan, Arof, Hamzah, Paul, Mukul Chandra, Harun, Sulaiman Wadi
• Format: Article
• Language: English; English
• Published: Institute of Advanced Engineering and Science (IAES) 2017
• Subjects: TA Engineering (General). Civil engineering (General)
• Online Access: http://irep.iium.edu.my/62818/1/62818_Dual-wavelength%20thulium%20ytterbium_article.pdf; http://irep.iium.edu.my/62818/2/62818_Dual-wavelength%20thulium%20ytterbium_scopus.pdf; http://irep.iium.edu.my/62818/; http://www.iaescore.com/journals/index.php/IJEECS/article/viewFile/10014/7648

We report on the generation of dual-wavelength fiber laser peaking at 1990.64 and 1998.92 nm with a simple ring cavity setup. The lasers are demonstrated using a fabricated silica-based nanoengineered octagonal shaped double-clad Thulium-Ytterbium co-doped fiber (TYDF) as a gain medium in a simple all-fiber ring configuration. By using 980 nm multimode laser, a stable dual-wavelength laser is generated at a threshold pump power of 1500 mW due to the non-polarization rotation (NPR) effect occurred in the cavity. The effect has been self-controlled by a suppression of mode competition in the gain medium. The result shows that the slope efficiency of the generated dual–wavelength laser is measured to be 27.23%. This dual-wavelength TYDF laser operated steadily at room temperature with a 34 dB optical signal-to-noise ratio