Abstract
To date, demonstrated ultrashort pulse seed sources for Ho3+-doped amplifiers, such as Ho:YAG and Ho:YLF, leave a lot to be desired in terms of complexity, cost, and efficiency. Sources like those used in [1] involve nonlinear energy transfer schemes, requiring numerous stages before a pulse covering a suitable spectral range (Ho:YAG, 2090 nm; Ho:YLF, 2050/2060 nm) is generated. The more direct approach of using a Ho:fiber laser, as reported in [2], benefits from a less complex setup. However, the requirement of multiple pump stages inevitably reduces the systems overall efficiency in addition to increasing the cost. A clear route for reducing the overall cost and complexity of such ultrashort pulse seed sources would be to employ a gain medium that could utilise direct diode pumping as well as being able to target the gain spectra of existing Ho3+-doped amplifiers. Here we report on our recent developments of diode-pumped ultrashort pulse Tm3+-doped Lu2O3 and LuScO3 lasers broadly tunable in the 2000–2100 nm spectral range.
© 2019 IEEE
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