https://wiki.tachyony.co.uk/w/api.php?action=feedcontributions&feedformat=atom&user=81.97.28.57 2026-07-08T09:35:07Z User contributions MediaWiki 1.44.0 https://wiki.tachyony.co.uk/w/index.php?title=Effective_mode_volume&diff=43321 2024-12-23T15:36:30Z

<p>81.97.28.57: </p> <hr /> <div> {{See also|Mode volume}}<br /> <br /> For an [[optical fiber]], the '''effective mode volume''' is the square of the product of the diameter of the [[Near and far field|near-field]] pattern and the sine of the [[radiation angle]] of the [[Near and far field|far-field]] pattern. The diameter of the near-field [[radiation pattern]] is defined here as the [[full width at half maximum]] and the radiation angle at half maximum [[radiant intensity]]. Effective [[Transverse mode|mode]] volume is [[Proportionality (mathematics)|proportional]] to the breadth of the relative distribution of [[Power (physics)|power]] amongst the modes in a multimode fiber. It is not truly a spatial volume but rather an ''&quot;optical volume&quot;'' equal to the product of area and solid angle. The power divided by the effective mode volume is proportional to the [[radiance]] of the light emitted by the fiber.<br /> <br /> ==References==<br /> *{{FS1037C}}<br /> <br /> [[Category:Fiber optics]]</div>

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