Abstract

A multi-wavelength fiber laser can be used as an ideal light source device for optical communication of wavelength-division multiplexing. A type of combined filter composed of a gold nanoparticle saturated absorber and three-wave polarization controller was constructed. Its multi-wavelength laser output is realized in an erbium-doped fiber ring laser. We studied the degradation of single-wavelength, dual-wavelength, and triple-wavelength output in the range of 1555–1565 nm, the tunability of three wavelengths, and the spectral periodicity of 1 min 57 s. The interesting phenomena of subregional transmission of gold nanoparticles were discovered. We have a clearer understanding of the filtering process of gold nanosaturable absorbers and the special state between pulsed and non-pulsed when using them to achieve ultra-short pulsed lasers.

© 2020 Optical Society of America

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