Abstract In this paper we investigate the effect of two incoherent steps on the statistical properties of cascade lasers without and with inversion. It is demonstrated that the noise in the intensity difference may be reduced 50% below the shot noise. A simple physical explanation of the mechanism for squeezing is given.
Received: 09 April 1998
Revised: 13 August 1998
Accepted manuscript online:
PACS:
42.50.Lc
(Quantum fluctuations, quantum noise, and quantum jumps)
Fund: Project supported by the National Natural Science Foundation of China (Grant No.59708001) and by the Natural Science Foundation of Hubei Province (Grant No.97J013), China.
Cite this article:
HU XIANG-MING (胡响明), PENG JIN-SHENG (彭金生) DYNAMIC QUANTUM NOISE REDUCTION IN A CASCADE LASER WITH AND WITHOUT INVERSION 1998 Acta Physica Sinica (Overseas Edition) 7 886
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
