We demonstrate a mid-infrared dysprosium-doped fluoride fiber laser with a continuously tunable output range of 573 nm, pumped by a 1.7 μm Raman fiber laser. To the best of our knowledge, this represents the largest tuning range achieved to date from any rare-earth-doped fiber laser and, critically, spans the 2.8–3.4 μm spectral region, which contains absorption resonances of many important functional groups and is uncovered by other rare-earth ions. Output powers up to 170 mW are achieved, with 21% slope efficiency. We also discuss the relative merits of the 1.7 μm pump scheme, including possible pump excited-state absorption.

中文翻译：

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掺ZBLAN光纤激光器可从2.8μm调谐到3.4μm，以1.7μm泵浦

我们演示了由1.7μm拉曼光纤激光器泵浦的具有573 nm连续可调输出范围的中红外掺氟化物光纤激光器。据我们所知，这代表了迄今为止任何稀土掺杂光纤激光器所能达到的最大调谐范围，并且关键地跨越了2.8–3.4μm的光谱区域，该光谱区域包含许多重要官能团的吸收共振，并且尚未发现被其他稀土离子 输出功率高达170 mW，斜率效率为21％。我们还将讨论1.7μm泵方案的相对优点，包括可能的泵激发态吸收。