Chinese Optics Letters, Volume. 19, Issue 12, 121402(2021)
Q-switched mode-locked multimode fiber laser based on a graphene-deposited multimode microfiber On the Cover
Fig. 1. Experimental setup of the QML MMF laser with a GMM.
Fig. 2. (a) Microscope image of the fabricated GMM; (b) nonlinear saturable absorption curve and the corresponding fitting curve of the fabricated GMM; (c) spectral filtering characteristic of the fabricated GMM.
Fig. 3. QML operation at the pump power of 1.40 W. (a)–(c) QML pulse-train in the time range of 200 µs (20 µs/div), 20 µs (2 µs/div), and 200 ns (20 ns/div), respectively; (d) the corresponding optical spectrum; (e) the RF spectrum; (f) the beam profile.
Fig. 4. Wavelength-tunable QML operation at the pump power of 1.40 W.
Fig. 5. Pump-dependent characteristics of the single-wavelength QML operation. (a) QML pulse-train under different pump power; (b) the pulse envelope width and repetition rate versus the pump power; (c) the average output power and pulse energy versus the pump power.
Fig. 6. Single-wavelength fifth harmonic QML operation at the pump power of 1.40 W. (a) The Q-switched envelope in the time range of 20 µs (2 µs/div), while the inset is the pulse-train in the time range of 200 µs (20 µs/div); (b) the mode-locked pulse-train underneath the Q-switched envelope in the time range of 200 ns (20 ns/div); (c) the RF spectrum; (d) the beam profile.
Fig. 7. Characteristics of the dual-wavelength QML operation. (a) The dual-wavelength spectra with different wavelength spacings at the pump power of 1.40 W; (b) the QML pulse-trains under different pump powers at the central wavelengths of 1030.48 nm and 1033.78 nm.
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Jia-Wen Wu, Yu-Xin Gao, Xu-Bin Lin, Jin-Gan Long, Hu Cui, Zhi-Chao Luo, Wen-Cheng Xu, Ai-Ping Luo, "Q-switched mode-locked multimode fiber laser based on a graphene-deposited multimode microfiber," Chin.Opt.Lett. 19, 121402 (2021)
Category: Lasers, Optical Amplifiers, and Laser Optics
Received: Apr. 19, 2021
Accepted: Jun. 4, 2021
Published Online: Sep. 17, 2021
The Author Email: Ai-Ping Luo (luoaiping@scnu.edu.cn)