Haris, Hazlihan and Muhammad, Ahmad Razif and Saidin, Norazlina and Abidin, Mohd Shahnan Zainal and Arof, Hamzah and Paul, Mukul Chandra and Harun, Sulaiman Wadi
(2017)
Dual-wavelength thulium ytterbium Co-doped fiber laser.
Indonesian Journal of Electrical Engineering and Computer Science, 8 (2).
pp. 457-46.
ISSN 2502-4752
Abstract
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 nano-engineered 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 steadilyat room temperature with a 34 dB optical signal-to-noise ratio.
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