Despite the huge popularity of carbon nanotube-based saturable absorbers their applicability to Ho-doped fiber lasers was not extensively investigated in terms of stability, scalability, and operation in different dispersion regimes. Moreover, carbon nanotube-based saturable absorbers demonstrated so far consisted of either a mixture of metallic and semiconducting, or exclusively semiconducting carbon nanotubes. In this work we show fabrication of purely metallic single-walled carbon nanotube (m-SWCNT) films and present their application as saturable absorbers for a Ho-doped fiber laser operating in solitonic and stretched-pulse dispersion regimes.

© 2019 IEEE

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