Compensation of beam walk-off in hollow metal waveguides

J. S. Yeo, R. N. Bicknell, S. Mathai, P. E. Kornilovitch, H. P. Kuo, P. Rosenberg, M. Tan, L. King

Research output: Contribution to journalArticlepeer-review


Hollow metal waveguides feature well collimated beams and small losses across air gaps. This enables introduction of multiple optical beam splitters, or taps, along the waveguide to multicast signals from a source to multiple receivers. The splitters need to be of sufficient thickness to provide mechanical integrity and ease of handling. As a result, passing through the thickness leads to a beam walk-off. Walk-off dependence on the splitter thickness and its effect on the system optical efficiency are investigated. Two methods to compensate the walk-off are described: by offsetting the outgoing waveguide, and by introducing an additional symmetric optical element to shift the beam back to the original optical path. Both methods have been shown to effectively mitigate the walk-off effects.

Original languageEnglish
Pages (from-to)1073-1077
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Issue number4
Publication statusPublished - 2009 Jun

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)


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