Abstract
We report the demonstration of a 2850nm diode-pumped Ho3+, Pr3+ co-doped fluoride fiber amplifier that delivers pulses with an average power of 2.45W, 122μJ energy, and 500ps duration at a repetition rate of 20kHz. To the best of our knowledge, the average power and pulse energy are the highest to be obtained from a sub-nanosecond fiber source operating in the 3μm spectral region. The amplifier is seeded by an optical parametric generation source and is pumped around 915nm using widely available InGaAs laser diodes.
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