Tunable passively Q-switched ytterbium-doped fiber laser using MoWS₂/rGO nanocomposite saturable absorber

• Autorzy: Mohanraj J. , Velmurugan Venugopal , Sivabalan Sivaraj

Identyfikatory

DOI

10.1016/j.opelre.2018.11.001

• Języki publikacji: EN

Abstrakty

EN

We demonstrated a tunable Q-switched ytterbium-doped fiber laser (YDFL) using MWS₂/rGO nanocomposite as passive saturable absorber. Further, the Mo₁₋xWxS₂/rGO nanosheets, with x proportion of 0.2, are synthesized using hydrothermal exfoliation technique. The proposed nanocomposite-PVA based thin film is fabricated by mixing the MoWS₂/rGO nanosheets with polyvinyl alcohol (PVA). The fabricated thin film is sandwiched between two fiber ferrules to realize the proposed saturable absorber (SA). Further, the proposed MoWS₂/rGO-PVA based thin film SA exhibits a fast relaxation time and a high damage threshold which are suitable to realize a Q-switched pulsed laser with a tunable wavelength range of 10 nm that extends from 1028 nm to 1038 nm. For the highest pump power of 267.4 mW, the generated Q-switched pulses exhibit a narrow pulse width of 1.22 μs, the pulse repetition rate of 90.4 kHz, the highest pulse energy of 2.13 nJ and its corresponding average power of 0.193 mW. To the best of author’s knowledge, this is the first realization of a tunable Q-switching fiber laser in a 1 μm wavelength using MoWS₂/rGO nanocomposite saturable absorber.

Słowa kluczowe

EN

transition metal dichalcogenides; Q-switched fiber laser; molybdenum; tungsten disulfide; saturable absorber

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2019
• Tom: Vol. 27, No. 1
• Strony: 18--24
• Opis fizyczny: Bibliogr. 39 poz., wykr., il.

Twórcy

autor

Mohanraj J.

• Department of Electronics and Communication Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Avadi, Chennai 600062, TN, India

autor

Velmurugan Venugopal

• Centre for Nanotechnology Research, Vellore Institute of Technology, Vellore, 632 014, India

autor

Sivabalan Sivaraj

• School of Electrical Engineering, Vellore Institute of Technology, Vellore, 632 014, India

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).