期刊
OPTICS LETTERS
卷 34, 期 23, 页码 3616-3618出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.34.003616
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资金
- U.S. Department of Energy (DOE) [DE-FG02-08ER85029]
- Air Force Research Laboratory
- Materials and Manufacturing Directorate
- Wright-Patterson AFB [FA8650-08-C-5401]
We report self-starting passively mode-locked fiber lasers with a saturable absorber mirror using a piece of 30-cm-long newly developed highly thulium (Tm)-doped silicate glass fibers. The mode-locked pulses operate at 1980 nm with duration of 1.5 ps and energy of 0.76 nJ. This newly developed Tm-doped silicate fiber exhibits a slope efficiency of 68.3%, an amplified spontaneous emission spectrum bandwidth (FWHM) of 92 nm, and a gain per unit length of greater than 2 dB/cm. To the best of our knowledge, it is the first demonstration of mode-locked 2 mu m fiber laser using shorter than 1-m-long active fiber, which paves the way for the demonstration of mode-locked fiber laser at 2 mu m with gigahertz fundamental repetition rate. (C) 2009 Optical Society of America
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