We report on the development of a high pulse energy femtosecond Yb:KGd(WO 4 ) 2 laser pumped by a fiber-coupled diode module. Passive mode locking was initiated using a semiconductor saturable absorber mirror. The laser produced 420 fs pulses with up to 145 nJ of energy at a repetition rate of 14.5 MHz. The output spectrum was centered at 1030 nm. At the lower pulse energy of 100 nJ the laser produced 300 fs long pulses.
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Major et al. (2008) studied this question.
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