Abstract
Quantum noise below the SQL (“amplitude squeezing”) in the light from laser diodes was first demonstrated by Machida et al in 1987 [1] and intensity noise levels as low as 8.3 dB below the normal shot noise level have been reported [2] using cooled, free-running TJS laser diodes. With the use of injection locking and external cavity line-width narrowing techniques to reduce mode-partition noise, noise levels of several dB below the shot noise level have also been reported with QW laser diodes at room temperature [3].
© 1996 Optical Society of America
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