Abstract
A compact multi-wavelength harmonic passive mode-locked (MWHML) erbium-doped fiber laser (EDFL) has been demonstrated by integrating a Barium Titanate (BaTiO3) in the ring cavity configuration. The BaTiO3 with 9.5% modulation depth serves as a saturable absorber (SA) and is optically deposited by the Top-Down method to form an end face fiber integrated saturable absorber. Both the saturable absorption property and the large third-order nonlinearity of BaTiO3 assisted in generating a second-order harmonic pulse beside the fundamental frequency. Moreover, in real-time, eight wavelengths around 1560 nm with 0.7 nm wavelength spacing were produced with a maximum output power of 2.7 mW pulse duration of 5.2 ps. These results further suggest that BaTiO3 could be a good candidate for the saturable absorber and high nonlinear photonic device for related applications.
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