Advanced volume holographic filter to improve the SNR of polychromatic sources in a noisy environment

Pedro Enrique Alcaraz, Pierre Alexandre Blanche

Research output: Contribution to journalArticlepeer-review

Abstract

We present a new type of filter that improves the SNR of systems where polychromatic signal and noise are located at different distances within the same line of sight. The filter is based on holographic technology that allows for the discrimination of wavefronts by range. In using a combination of two holographic elements, a pre-disperser and a thick volume hologram, we were able to significantly increase the spectral bandwidth of the filter, from 9nm without the pre-disperser to 70nm with both holographic elements. Laboratory proof of concept demonstrated that such a filter is capable of an SNR improvement of 15 dB for a monochromatic source, and up to 7.6 dB for a polychromatic source. This filter can find applications in astronomic observation, satellite or space debris tracking, and free-space optical communication.

Original languageEnglish (US)
Pages (from-to)1232-1243
Number of pages12
JournalOptics Express
Volume29
Issue number2
DOIs
StatePublished - Jan 18 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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