A mode-locked, dual-wavelength pumped 3.5 μ m fiber laser using frequency shifted feedback utilizing an acousto-optic modulator is reported. Pulses of 3.8 ps with 9.7 nJ were obtained at a repetit…
We report two new near-infrared pump wavelengths at 0.8 μm and 0.9 μm for dysprosium (Dy 3+ )-doped mid-infrared fiber lasers, which are free from detrimental pump excited state absorption that h…