Qimeng Lin, Li Yan, Yuanqi Song, Xuzhuo Jia, Xiaoqiang Feng, Lei Hou, Jintao Bai, "Switchable single- and dual-wavelength femtosecond mode-locked Er-doped fiber laser based on carboxyl-functionalized graphene oxide saturable absorber," Chin. Opt. Lett. 19, 111405 (2021)
- Chinese Optics Letters
- Vol. 19, Issue 11, 111405 (2021)
Fig. 1. (a) Setup of the balanced twin-detector measurement method; (b) nonlinear optical characteristics of the GO-COOH.
Fig. 2. Raman spectrum of GO-COOH film.
Fig. 3. Configuration of the Er-doped MLFL. WDM, wavelength division multiplexer; gain fiber, Er-doped fiber; PD-ISO, polarization-dependent isolator; PC, polarization controller; OC, optical coupler.
Fig. 4. Characteristics of single-wavelength conventional soliton fiber laser oscillator. (a) Oscilloscopic pulse train. (b) The corresponding optical spectrum. (c) Radio frequency (RF) spectrum; the inset is RF in the 1 GHz range. (d) Autocorrelation (AC) trace of the output pulse.
Fig. 5. Characteristics of dual-wavelength conventional soliton fiber laser oscillator. (a) Pulse train with different intensities. (b) The corresponding optical spectrum. (c) RF spectrum with 110 Hz resolution. (d) AC trace of the output pulse.
Fig. 6. (a) Evolution of the optical spectrum of the fiber laser with the pump power. (b) The evolution of the output power of the fiber laser with the pump power.
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Table 1. Summary of the Dual-Wavelength Soliton Fiber Lasers Near 1550 nm with 2D Nanomaterials
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