  To benefit high-power interferometry and the creation of low-noise light
sources, we develop a simple lead-compensated photodetector enabling
quantum-limited readout from 0.3 mW to 10 mW and 10 k$\Omega$ transimpedance
gain from 85 Hz - 35 MHz. Feeding the detector output back to an intensity
modulator, we squash the classical amplitude noise of a commercial 1550 nm
fiber laser to the shot noise limit over a bandwidth of 700 Hz - 200 kHz,
observing no degradation to its (nominally ~100 Hz) linewidth.
