Spatial Coherence of Laser Light with Multi-Mode Oscillations

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  • FUJIWARA Hirofumi
    Department of Applied Physics, Faculty of Engineering, Hokkaido University,

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Other Title
  • レーザー光モードと空間的コヒーレンス
  • レーザーコウ モード ト クウカンテキ コヒーレンス

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Description

Spatial coherence of a laser light under multi-mode oscillations is investigated from the propagation theory of spatial coherence function. As an example, a confocal type of a Fabry-Perot resonator is considered, in order to evaluate both the degree of spatial coherence and intensity distribution over a laser beam which oscillates with a few of the modes expressed by a Hermite-Gaussian function. It is then shown that a laser light is not always completely spatially coherent even though a radiation pattern takes nearly a Gaussian type. This can be solved, as an example, by studying spatial coherence for a laser oscillation of TEM00 TEM01+TEM10 modes.

Journal

  • Oyo Buturi

    Oyo Buturi 40 (3), 281-286, 1971

    The Japan Society of Applied Physics

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