The operating characteristics of an efficient 60 mW, single frequency,
low noise integrated Master Oscillator Power Amplifier (MOPA) with ac
tive noise suppression is presented. With active noise reduction this
source demonstrated a maximum relative intensity noise of -110 dB/Hz b
elow the CW lasing level in the relaxation oscillation regime and a br
oadband RMS noise of 0.39% with respect to the CW lasing level in a 2
MHz bandwidth.