Leaky mode

Leaky mode

A leaky mode or tunneling mode in an optical fiber or other waveguide is a mode having an electric field that decays monotonically for a finite distance in the transverse direction but becomes oscillatory everywhere beyond that finite distance. Such a mode gradually "leaks" out of the waveguide as it travels down it, producing attenuation even if the waveguide is perfect in every respect. In order for a leaky mode to be definable as a mode, the relative amplitude of the oscillatory part (the leakage rate) must be sufficiently small that the mode substantially maintains its shape as it decays.

Leaky modes correspond to leaky rays in the terminology of geometric optics.

References


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Leaky Bucket — Der Leaky Bucket Algorithmus ist ein einfaches Verfahren zum Traffic Shaping. Es wird damit die Menge der übertragenen Daten geregelt. Dabei wird die maximale Datenrate begrenzt. Ein ähnlicher Algorithmus ist der Token Bucket Algorithmus. Alle… …   Deutsch Wikipedia

  • Leaky-Bucket-Algorithmus — Der Leaky Bucket Algorithmus ist ein einfaches Verfahren zum Traffic Shaping. Es wird damit die Menge der übertragenen Daten geregelt. Dabei wird die maximale Datenrate begrenzt. Ein ähnlicher Algorithmus ist der Token Bucket Algorithmus. Leaky… …   Deutsch Wikipedia

  • Normal mode — For other types of mode, see Mode (disambiguation). Vibration of a single normal mode of a circular disc with a pinned boundary condition along the entire outer edge. See other modes. A normal mode of an oscillating system is a pattern of motio …   Wikipedia

  • Guided-mode resonance — or waveguide mode resonance is a phenomenon wherein the guided modes of an optical waveguide can be excited and simultaneously extracted by the introduction of a phase matching element such as a diffraction gratingor . Such guided modes are also… …   Wikipedia

  • Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …   Wikipedia

  • вытекающая мода — Волна, образующаяся при падении луча на торец волокна под углом, превышающим апертурный угол θA. За счет преломления на границе раздела сердцевина оболочка волна теряет часть энергии и происходит ее затухание (луч 3 на рис. L 3). Рис. L 3.… …   Справочник технического переводчика

  • Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …   Wikipedia

  • Non-Radiative Dielectric waveguide (NRD) — Figure 1 Contents 1 Introduction 2 The dispersion relation in the NRD wave …   Wikipedia

  • Waveguide (electromagnetism) — In electromagnetics and communications engineering, the term waveguide may refer to any linear structure that guides electromagnetic waves. However, the original and most common meaning is a hollow metal pipe used for this purpose.A dielectric… …   Wikipedia

  • Waveguide (optics) — This page is about waveguides for transmission of optical signals or power. For other types of waveguide, see the disambiguation page Waveguide An optical waveguide is a physical structure that guides electromagnetic waves in the optical spectrum …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”