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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 9,
  • Issue 9,
  • pp. 090603-
  • (2011)

Demultiplexer based on an of f-axis holographic lens with low monochromatic aberrations

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Abstract

A novel scheme is proposed, in which the aberrations in the off-axis holographic lenses used as demultiplexers are reduced to a low enough level for relatively small channel spacing. The scheme includes optimizing the recording and reconstruction geometries and collimating the reconstruction wave with a gradient-index lens. A demultiplexer operated in the 1 550-nm band with 5-nm channel spacing and ?\infty-dB crosstalk is obtained using the scheme. The channel spacing can be decreased to 2 nm by etching the cladding of the output fibers to a smaller size.

© 2011 Chinese Optics Letters

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