Multiwavelength erbium-doped fiber laser based on a nonlinear amplified loop mirror with a highly-nonlinear photonic crystal fiber

摘要: A multiwavelength erbium-doped fiber laser based on a nonlinear amplified loop mirror with highly-nonlinear photonic crystal was proposed and experimentally investigated. The performance of the improved by using single 3-dB coupler length 100 m. extinction ratio measured to be more than 50 dB. output power fluctuation less 0.5 difference among multiple peaks 0.3 Lyot-Sagnac filter two segments polarizationmaintaining photonic-crystal fibers employed as multichannel filter, wavelength spacing controlled changing polarization states within filter. Two different spacings, 0.6 nm 0.8 nm, were obtained. number channels also changed: 20 for Δλ = 16 nm. In addition, precisely-interleaved switching realized states.