Abstract
The gain bandwidth of Ho-doped crystals is sufficiently broad to support femtosecond operation, which would allow pumping of ultrashort-pulse mid-IR optical parametric amplifiers (OPAs) [1,2] and, upon reaching adequate peak powers, eye-safe filamentation in the >2-μm transparency window of the atmosphere. In this contribution, we report on, to our knowledge, the first demonstration of a femtosecond cw-pumped Ho:YAG chirped pulse amplifier (CPA) system operating at room temperature and producing broadband pulses supporting ~440 fs pulse durations at the energy level of up to 3 mJ at a 5-kHz repetition rate.
© 2013 IEEE
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