Encyclopedia > Speckle pattern

Article Content

Speckle pattern

Speckle pattern: In optical systems, a field-intensity pattern produced by the mutual interference of partially coherent beams that are subject to minute temporal and spatial fluctuations.

Note: In a multimode fiber, a speckle pattern results from a superposition of mode field patterns. If the relative modal group velocities change with time, the speckle pattern will also change with time. If differential mode attenuation[?] occurs, modal noise[?] results.

Source: from Federal Standard 1037C and from MIL-STD-188

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

North Haven, New York

... is 105.9/km² (274.2/mi²). There are 578 housing units at an average density of 82.3/km² (213.3/mi²). The racial makeup of the village is 98.38% White, ...