title: Frequency-stable and ultranarrow-linewidth semiconductor laser locked directly to an atomic-cesium transition.
abstract: We describe a new method for semiconductor laser FM noise reduction. A Doppler-free Faraday resonance in Cs vapor provided optical feedback, and FM sideband saturation spectroscopy in a second Cs cell provided electronic feedback. The combined optical and electronic feedback allowed us to reduce the low-frequency FM noise power by more than 6 orders of magnitude, which resulted in a sub-100-Hz-linewidth semiconductor laser locked directly to an atomic transition frequency.
authors: Y
authors: Y
authors: Shevy
authors: H
authors: H
authors: Deng