Amplitude-squeezed, frequency-modulated, tunable, diode-laser-based source for sub-shot-noise FM spectroscopy

Optics Letters
S KasapiY Yamamoto

Abstract

We have developed a frequency-modulated, tunable, amplitude-squeezed, diode-laser-based source and used it to perform FM spectroscopy on rubidium. The setup consists of a free-running diode laser injection locked by a frequency-stabilized, current-modulated diode laser. The injection-locked slave laser beam adopted the frequency spectrum of the master laser beam while rejecting residual AM in the master laser beam by more than 50 dB. Injection locking also enhanced amplitude squeezing in the slave laser beam by suppressing uncorrelated longitudinal sidemodes. The noise floor of the measurement was 0.8 dB below the shot-noise level.

References

Nov 1, 1986·Physical Review A: General Physics·Y YamamotoO Nilsson
Sep 1, 1993·Physical Review. a·S InoueH Ohzu
Sep 1, 1996·Physical Review. a·D C KilperD G Steel
Feb 29, 1988·Physical Review Letters·S Machida, Y Yamamoto
May 18, 1992·Physical Review Letters·E S PolzikH J Kimble
Dec 13, 1993·Physical Review Letters·H WangD G Steel
Dec 18, 1995·Physical Review Letters·F MarinP Grangier
Mar 1, 1993·Optics Letters·M J FreemanD R Scifres

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