Reduction of the intensity noise from an erbium-doped fiber laser to the standard quantum limit by intracavity spectral filtering

Abstract
The high frequency intensity noise of a tandem fiber Fabry–Perot erbium‐doped fiber ring laser is reduced to the standard quantum limit, with a 0.5 dB experimental uncertainty.Noise reduction of ≳14 dB is achieved by intracavity spectral filtering of weak side modes using a narrow‐band fiber Fabry–Perot etalon.