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Proceedings Paper

Extension of matched optical filtering to scalable multi-channel high-sensitivity photon-counting applications (Conference Presentation)
Author(s): Katia Shtyrkova; Igor Gaschits; David O. Caplan

Paper Abstract

We present WDM-scalable low-loss and narrow-bandwidth optical filtering techniques for high-sensitivity photon-counting applications. A cascaded approach using two filtering elements is leveraged that can efficiently receive multi-spatial-mode WDM optical signals through the turbulent free-space optical channel: a periodic narrowband background-rejection filter in which each passband can be well matched to the incoming transmitter waveform; and a WDM separation filter that distributes received WDM channels to detection elements within a receiver array. This combination enables large-constellation modulation options with improved sensitivity and provides a scalable high-performance optical-filtering solution that is particularly attractive for bandwidth-constrained photon-counting applications.

Paper Details

Date Published: 9 March 2020
Proc. SPIE 11272, Free-Space Laser Communications XXXII, 112720S (9 March 2020); doi: 10.1117/12.2550003
Show Author Affiliations
Katia Shtyrkova, MIT Lincoln Lab. (United States)
Igor Gaschits, MIT Lincoln Lab. (United States)
David O. Caplan, MIT Lincoln Lab (United States)

Published in SPIE Proceedings Vol. 11272:
Free-Space Laser Communications XXXII
Hamid Hemmati; Don M. Boroson, Editor(s)

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