Near-field to far-field transition of photonic crystal fibers: symmetries and interference phenomena

Details Near-field to far-field transition of photonic crystal fibers: symmetries and interference phenomena Near-field to far-field transition of photonic crystal fibers: symmetries and interference phenomena

2002-05-28

arxiv.org/abs/physics/0205074v1

Optics Express 10, 475 (2002).

Physics

Optics

7 pages including 6 figures. Animated version of Fig. 5 is available at http://www.crystal-fibre.com/technology/movie.gif

Scientific paper

The transition from the near to the far field of the fundamental mode radiating out of a photonic crystal fiber is investigated experimentally and theoretically. It is observed that the hexagonal shape of the near field rotates two times by pi/6 when moving into the far field, and eventually six satellites form around a nearly gaussian far-field pattern. A semi-empirical model is proposed, based on describing the near field as a sum of seven gaussian distributions, which qualitatively explains all the observed phenomena and quantitatively predicts the relative intensity of the six satellites in the far field.

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