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We proposed and demonstrated a stable multiwavelength erbium-doped fiber laser by using a microfiber knot resonator (MKR)-based comb filter. By properly rotating the polarization controller, up to 11 lasing lines in a 3-dB bandwidth with 0.184-nm channel spacing were obtained. In addition, the lasing locations can be flexibly tuned by virtue of spectral filtering effect induced by the polarization-dependent...
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