An ytterbium:fluorapatite (Yb:FAP) laser crystal is longitudinally pru
mped using a Ti:sapphire laser emitting at 905 nn. The highest slope e
fficiency obtained was 60.5%, and the maximum output power was 214 mW
with a pump power of 438 mW. Repetitive Q-switching ass demonstrated f
or the first time. The Q-switched average power was identical to the c
ontinuous wave (CW) power at repetition rates exceeding 20 kHz, as is
consistent with the 1.08-ms emission lifetime.