A novel Yb 3+ -doped four-wavelength double clad fibre laser based on a Fabry-Perot filter, and pumped by a 976 nm laser diode is presented. Its output laser wavelengths are 1085, 1090, 1095 and 1010 nm, respectively. The laser exhibits 0.32 nm line-width, 1.5 W laser output power, 40 dB signal-to-noise ratio and 66% slope efficiency.
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Xu et al. (2003) studied this question.
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