Advanced volume holographic filter to improve the SNR of polychromatic sources in a noisy environment
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 06, 2021
- Source ID
- 10.1364/oe.414217
Entities
People
- Pedro Enrique Alcaraz
- Pierre-Alexandre Blanche
Organizations
- United States Naval Research Laboratory