Broadband ultrashort pulse modulation of zeolite based the single wall carbon nanotube

Summary form only. We reported a wide-band single walled carbon nanotube (SWCNT) saturable absorber (SA) fabricated in the onedimensional nanochannels of ZnAPO4-5 (AFI) zeolite single crystals. The as-synthesized SA could provide Q-switched operation at both 1038.8 and 1856.5 nm in the ytterbium-, and thulium-doped fiber lasers. Owing to the polarization state in the cavities remained unchanged by the all polarization maintaining (PM) optical paths, the modulation was only related to the nonlinearity of the material. The modulation depths were characterized by the balanced twin-detector system at different wavelengths, showing excellent anisotropic optical properties, which were 5.5 % and 13.0 %, respectively. These results demonstrated that the SWCNT@AFI crystal could act as a universal polarization sensitive SA which was an excellent device for ultrafast pulsed fiber laser with a broad spectral coverage.