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<p>In this work, a stable dual-wavelength mode-locked erbium-doped fiber laser (EDFL) incorporating sub-stoichiometric molybdenum trioxide (MoO<sub>3-x</sub>) as a saturable absorber (SA) is presented. The MoO<sub>3-x</sub> thin-film SA was prepared by hot-wire chemical vapor deposition (HWCVD) to induce oxygen vacancies and integrated into an all-fiber EDFL cavity. Stable dual-wavelength mode-locking was achieved over a pump power range of 109.1 mW to 164.5 mW, with peak wavelengths at 1532.2 nm and 1558.2 nm, separated by 26.0 nm. The mode-locked pulses exhibited an ultrashort pulse width of 4.44 ps, a repetition rate of 1.277 MHz, and a signal-to-noise ratio (SNR) of 84.32 dB. The maximum output power obtained was 10.07 mW, corresponding to a maximum pulse energy of 7.9 nJ. The stability of the dual-wavelength mode-locking was confirmed by continuous operation over 70 min. These findings demonstrate the potential of MoO<sub>3-x</sub> as an effective saturable absorber for generating stable dual-wavelength picosecond pulses in fiber lasers.</p>

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Hot-wire chemical vapor deposition-synthesized MoO3-x saturable absorber for dual-wavelength mode-locked fiber laser

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Muhammad Khairul Ashraf Azmi,
  • Siti Nasuha Mustaffa,
  • Muhammad Asif Ahmad Khushaini,
  • Aeriyn Dwierni Ahmad,
  • Sulaiman Wadi Harun,
  • Afiq Arif Aminuddin Jafry,
  • Anas Abdul Latiff,
  • Ahmad Razif Muhammad

摘要

In this work, a stable dual-wavelength mode-locked erbium-doped fiber laser (EDFL) incorporating sub-stoichiometric molybdenum trioxide (MoO3-x) as a saturable absorber (SA) is presented. The MoO3-x thin-film SA was prepared by hot-wire chemical vapor deposition (HWCVD) to induce oxygen vacancies and integrated into an all-fiber EDFL cavity. Stable dual-wavelength mode-locking was achieved over a pump power range of 109.1 mW to 164.5 mW, with peak wavelengths at 1532.2 nm and 1558.2 nm, separated by 26.0 nm. The mode-locked pulses exhibited an ultrashort pulse width of 4.44 ps, a repetition rate of 1.277 MHz, and a signal-to-noise ratio (SNR) of 84.32 dB. The maximum output power obtained was 10.07 mW, corresponding to a maximum pulse energy of 7.9 nJ. The stability of the dual-wavelength mode-locking was confirmed by continuous operation over 70 min. These findings demonstrate the potential of MoO3-x as an effective saturable absorber for generating stable dual-wavelength picosecond pulses in fiber lasers.