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In this letter, we report on a multiple-wavelength up-conversion laser in Tm3+-doped ZrF4--BaF2--LaF3--AlF3--NaF glass fiber pumped by an 1120-nm fiber laser. Single-wavelength, two-wavelength, and three-wavelength up-conversion lasers can be obtained by adjusting the distance between the coupler mirror and the fiber end, which is attributed to the frequency-filter effect in the etalon composed of the coupler mirror and the fiber end. The effects of the pump power on the performance of dual-wavelength laser were also discussed.
Date of Publication: Sept. 2005