We present a compact diode-end-pumped Nd:YAG amplifier with a FWHM ang
ular bandwidth of 100 degrees. Using a 1.064-mu m probe beam, we measu
red a 2-pass gain of 23 (13.6 dB) and a 4-pass gain of 420 (26.2 dB).
High-gain image amplification with such a laser amplifier is also demo
nstrated. (C) 1997 Optical Society of America.