2022
DOI: 10.36227/techrxiv.19153865.v1
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Modelocked Tm-doped Fiber Laser Using Multimode Interference Saturable Absorber in Reflection Mode

Abstract: We present a reflection mode saturable absorber based on nonlinear multimode interference in a graded index multimode fiber. The saturable absorber provides a modulation depth of 12% at a low saturation intensity of 18.5 MW/cm<sup>2</sup>. The all-fiber structure and reflection mode design of this saturable absorber makes it an ideal device for the fabrication of fiber lasers with linear resonant cavity. When inserted in a linear laser cavity comprising a thulium doped fiber as the gain medium, the… Show more

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