Theoretical and experimental investigations of the Mid-IR DFG tuning property based on fiber laser fundamental lights

摘要: The tuning properties for the mid-IR DFG laser based on uniform grating PPLN have been investigated with tunable YDFL and EDFL fundamental lights. Our results show that, a fixed crystal temperature, idler range is less than 10 nm when tuned. Although pump may be allowed to tuned in its two QPM acceptance bands, still narrow temperature. By optimizing however, bands overlapped form one broadband band, which used increase 175 near 3.4 μm region. positions of single signal separate can continuously moved by adjusting also enhancing range. while whole combined between 2.98 3.78 was experimentally obtained three wavelengths 1.05, 1.08 1.11 μm. 690 has demonstrated only wavelength 1.58