Abstract

We report on the use of a fixed-spacer Fabry–Perot ring cavity to filter spatially and temporally a 10-W laser-diode-pumped Nd:YAG master-oscillator power amplifier. The spatial filtering leads to a 7.6-W TEM00 beam with 0.1% higher-order transverse mode content. The temporal filtering reduces the relative power fluctuations at 10 MHz to 2.8×10-9/Hz, which is 1 dB above the shot-noise limit for 50 mA of detected photocurrent.

© 1998 Optical Society of America

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