## Abstract

A phase-space inequality is derived for beams of arbitrary state of spatial coherence. It applies to the product of a factor which expresses the effective coherence area of the source that generates the beam and the effective angular spread of the beam; and, by analogy with coherent beams, it may be regarded as a measure of the beam quality. It is found that the factor attains a minimum for the entire class of Gaussian Schell-model beams (which include the Hermite Gaussian laser mode).

Original language | English |
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Pages (from-to) | 1-6 |

Journal | Optics Communications |

Volume | 187 |

Issue number | 1-3 |

DOIs | |

Publication status | Published - 2001 |