Gain and saturation intensity of the green Ho:ZBLAN upconversionfiber amplifier and laser |
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Authors: | Mejia EB Senin AA Talmadge JM Eden JG |
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Affiliation: | Centro de Investigacion y en Opt. AC, Leon; |
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Abstract: | The gain and saturation intensity of the green Ho-doped fluorozirconate (ZBLAN) glass fiber amplifier and laser, pumped in the red (643 ⩽ λp ⩽ 649 nm; 5F5 ← 5I8), have been measured. For a 2.4-μm core diameter fiber 45 cm in length, the single-pass gain at 543.4 nm exceeds 12 dB for 90 mW of pump power at 643.5 nm. The saturation power for the 5F4, 5S2 → 5I8 lasing transition was determined from gain measurements to be 970 ± 175 μW, which corresponds to a saturation intensity of 19.8 ± 3.5 kW · cm-2 , and a stimulated emission cross section approximately one order of magnitude larger than theoretical estimates |
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