Generation of dual-wavelength Q-switched laser pulses by employing Mo2Ti2AlC3 MAX phase film

• Published in: Optical fiber technology Vol. 81; p. 103566
• Main Authors: Najm, Mustafa Mohammed, Nizamani, B., Al-Azzawi, Alabbas A., Hmood, Jassim K., Abdullah, Mohammed Najm, Harun, S.W.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01-12-2023
• Subjects: Ceramics material; Dual-wavelength; EDFL; Max phases; Q-switch laser; Q-switch laser; Max phases; EDFL; Ceramics material; Dual-wavelength
• ISSN: 1068-5200; 1095-9912
• DOI: 10.1016/j.yofte.2023.103566

•Molybdenum titanium aluminum carbide (Mo2Ti2AlC3) particles are utilized to form saturable absorber (SA)•Both physical and optical properties of Mo2Ti2AlC3-SA are experimentally demonstrated.•Mo2Ti2AlC3 film is one of an excellent promising material for a various photonic applications.•The proposed Q-switched EDFL can generate dual-wavelength laser pulses.•The proposed EDFL can be utilized in many photonics applications and terahertz wave generation.
In this paper, we experimentally generate dual-wavelength laser pulses from a Q-switched erbium-doped fiber laser (QS-EDFL) by utilizing molybdenum titanium aluminum carbide (Mo2Ti2AlC3) MAX Phase film. The Mo2Ti2AlC3-SA film, which belongs to the MAX phase compound, is prepared using the mechanical exfoliation. The optical and physical properties of Mo2Ti2AlC3-SA are investigated. The fabricated film has a linear absorption of 8 dB and modulation depth of 17 % at 1.55 mm region. A steady dual-wavelength Q-switched laser pulses are achieved with 1531.6 nm and 1557 nm peaks and a free spectral range (FSR) of 25.4 nm. By increasing the input pump power from 131.87 mW to 167 mW, the repetition rate of generated pulses is varied over 104 kHz to 126 kHz. At the highest input power (167 mW), the energy and output power of the obtained pulses are 87.30 nJ and 11 mW, respectively. The results reveal that the exfoliated Mo2Ti2AlC3-SA can be operated inside EDFL to produce stable pulses with dual wavelengths.