Issues

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1992

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June

  

New instruments and measurement methods


Amplification and phase conjugation of weak signals

The results of the study on phase conjugation of weak optical signals with an energy of several photons are considered. Basic concepts of a semi-classical theoretical approach to describe amplification and phase conjugation (PC) of such signals are presented. A review is given of the experimental investigations that allowed reaching a limiting (about 1 photon per mode) sensitivity of optical systems with PC-mirrors for a large $(\sim10^5)$ number of resolution elements. High-sensitivity PC-mirror optical systems are demonstrated for a variety of applications.

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Fulltext is also available at DOI: 10.1070/PU1992v035n06ABEH002243
PACS: 42.65.Hw, 42.79.Bh, 42.30.−d (all)
DOI: 10.1070/PU1992v035n06ABEH002243
URL: https://ufn.ru/en/articles/1992/6/d/
Citation: Kulagin O V, Pasmanik G A, Shilov A A "Amplification and phase conjugation of weak signals" Sov. Phys. Usp. 35 (6) 506–519 (1992)
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Оригинал: Кулагин О В, Пасманик Г А, Шилов А А «Усиление и обращение волнового фронта слабых сигналов» УФН 162 (6) 129–157 (1992); DOI: 10.3367/UFNr.0162.199206d.0129

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