Issues

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1995

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November

  

Reviews of topical problems


Photon noise: observation, squeezing, interpretation

 a,  b
a Lomonosov Moscow State University, Department of Physics, Vorobevy gory, Moscow, 119992, Russian Federation
b Lebedev Physical Institute, Russian Academy of Sciences, Leninsky prosp. 53, Moscow, 119991, Russian Federation

A review of modern concepts of photon noise (PN), which is observed even in the case of an ideal laser, is presented. Methods of transformation, squeezing, and nondemolition observation of PN, are described. The optical nondemolition methods seem to be very important for the interpretation of PN. The experiments with PN suppression by negative electron feedback are analysed in detail within two alternative approaches, which could be called the a priori and a posteriori concepts. According to the first approach, PN exists in the laser beam from the beginning, while according to the second it appears only in the detectors. The theory based on the a priori concept predicts the squeezing of the in-loop field — in contrast to the a posteriori one. Several possible crucial experiments using the nondemolition methods are discussed.

Text can be downloaded in Russian. English translation is available on IOP Science.
PACS: 42.60.Mi
DOI: 10.1070/PU1995v038n11ABEH000117
URL: https://ufn.ru/en/articles/1995/11/b/
Citation: Klyshko D N, Masalov A V "Photon noise: observation, squeezing, interpretation" Phys. Usp. 38 1203–1230 (1995)
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Оригинал: Клышко Д Н, Масалов А В «Фотонный шум: наблюдение, подавление, интерпретация» УФН 165 1249–1278 (1995); DOI: 10.3367/UFNr.0165.199511b.1249

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