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Kvantovaya Elektronika, 1977, Volume 4, Number 6, Pages 1268–1275 (Mi qe12880)  

This article is cited in 2 scientific papers (total in 2 papers)

Phase transitions in formation of spatially coherent laser beams

V. B. Pakhalov, A. S. Chirkin
Abstract: The results are reported of an investigation of the changes in the spatial coherence (correlation) radius $r_c$ and radiation intensity $I$ on approach to the laser threshold. It is shown that their behavior obeys the laws $r_c\propto(\delta-\delta_{\text{th}})^{-\alpha}$ and $I\propto(\delta-\delta_{\text{th}})^{-\beta}$ where $\delta_{\text{th}}$ is the threshold value of the losses at which stimulated emission begins; $\alpha$ and $\beta$ are the critical exponents. It is reported that measurements carried out on an He–Ne laser give $\alpha=0.49\pm0.05$ and $\beta =0.9\pm0.2$. These values of $\alpha$ and $\beta$ are in agreement with the theory of formation of spatially coherent beams in lasers based on the wave approach ($\alpha=0.5$, $\beta=1.0$). The agreement of the experimental results with the Landau theory of phase transitions of the second kind is discussed.
Received: 23.07.1976
English version:
Soviet Journal of Quantum Electronics, 1977, Volume 7, Issue 6, Pages 715–719
DOI: https://doi.org/10.1070/QE1977v007n06ABEH012880
Document Type: Article
UDC: 535.41:536.76
PACS: 42.55.Fr
Language: Russian
Citation: V. B. Pakhalov, A. S. Chirkin, “Phase transitions in formation of spatially coherent laser beams”, Kvantovaya Elektronika, 4:6 (1977), 1268–1275 [Sov J Quantum Electron, 7:6 (1977), 715–719]
Citation in format AMSBIB
\Bibitem{PakChi77}
\by V.~B.~Pakhalov, A.~S.~Chirkin
\paper Phase transitions in formation of spatially coherent laser beams
\jour Kvantovaya Elektronika
\yr 1977
\vol 4
\issue 6
\pages 1268--1275
\mathnet{http://mi.mathnet.ru/qe12880}
\transl
\jour Sov J Quantum Electron
\yr 1977
\vol 7
\issue 6
\pages 715--719
\crossref{https://doi.org/10.1070/QE1977v007n06ABEH012880}
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  • https://www.mathnet.ru/eng/qe/v4/i6/p1268
  • This publication is cited in the following 2 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Квантовая электроника Quantum Electronics
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