Dispersion multiplexing with broadband filtering for miniature spectrometers.

Journal Article (Journal Article)

We replace the traditional grating used in a dispersive spectrometer with a multiplex holographic grating to increase the spectral range sensed by the instrument. The multiplexed grating allows us to measure three different, overlapping spectral bands on a color digital focal plane. The detector's broadband color filters, along with a computational inversion algorithm, let us disambiguate measurements made from the three bands. The overlapping spectral bands allow us to measure a greater spectral bandwidth than a traditional spectrometer with the same sized detector. Additionally, our spectrometer uses a static coded aperture mask in the place of a slit. The aperture mask allows increased light throughput, offsetting the photon loss at the broadband filters. We present our proof-of-concept dispersion multiplexing spectrometer design with experimental measurements to verify its operation.

Full Text

Duke Authors

Cited Authors

  • Cull, EC; Gehm, ME; Brady, DJ; Hsieh, CR; Momtahan, O; Adibi, A

Published Date

  • January 1, 2007

Published In

Volume / Issue

  • 46 / 3

Start / End Page

  • 365 - 374

PubMed ID

  • 17228382

Electronic International Standard Serial Number (EISSN)

  • 1539-4522

International Standard Serial Number (ISSN)

  • 1559-128X

Digital Object Identifier (DOI)

  • 10.1364/ao.46.000365


  • eng