1mJ KHz量级低于500飞秒的二极管泵浦的掺镱飞秒放大器

We demonstrate a directly diode-pumped Yb:KYW femtosecond laser amplifier with > 1 mJ pulse energy and pulse repetition rates higher than 5 kHz. The pulse duration was 480 fs and
the M² better than 1.2.