Novel narrow-band spectral interference filter with very high transmittance

J. Bogdanski, A. Danan, S. Jobling, K. T. McCusker, S. Quint, A. Z. Smith, J. Smith, P. G. Kwiat

Research output: Contribution to journalArticlepeer-review


We report a novel scheme to improve the effective transmission of a standard interference filter, and demonstrate over 97% passband transmission. Such high efficiency is critical for quantum information applications, e.g. high-efficiency single-photon generation utilizing parametric down-conversion. The scheme can also be modified to function with a tilted filter, thereby allowing tuning of the passband frequency. In addition, the tilted configuration creates an infinite number of consecutive reflections from and transmissions through the filter, further improving the net filter transmission. Because spectral interference filters are a key element in optical quantum information experiments (both on the source and detection side, e.g. to exclude background photons as well as to determine the spectra of the desired photons), our scheme of enhanced interference filter transmission should lead to significant performance improvements in such experiments.

Original languageEnglish (US)
Pages (from-to)306-311
Number of pages6
JournalJournal of Modern Optics
Issue number3-4
StatePublished - Jan 10 2011


  • heralding efficiency
  • interference filter
  • nonlinear optics
  • quantum information processing

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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