Experimental demonstration of photon efficient coherent temporal combining for data rate scaling
Author(s)
Geisler, David J.
Yarnall, Timothy M.
Stevens, Mark L.
Schieler, Curt M.
Robinson, Bryan S
Hamilton, Scott A
Date Issued
February 2016
Journal
Proceedings Volume 9739, Free-Space Laser Communication and Atmospheric Propagation XXVIII
Publisher
SPIE
Citation
Geisler, D. J., et al. "Experimental Demonstration of Photon Efficient Coherent Temporal Combining for Data Rate Scaling." Proceedings Volume 9739, Free-Space Laser Communication and Atmospheric Propagation XXVIII, 13-18 February, 2016, San Francisco, California, edited by Hamid Hemmati and Don M. Boroson, SPIE, 2016, p. 97390Y. © 2016 SPIE
Version
Final published version
Abstract
The next generation free-space optical (FSO) communications infrastructure will need to support a wide range of links from space-based terminals at LEO, GEO, and deep space to the ground. Efficiently enabling such a diverse mission set requires a common ground station architecture capable of providing excellent sensitivity (i.e., few photons-per-bit) while supporting a wide range of data rates. One method for achieving excellent sensitivity performance is to use integrated digital coherent receivers. Additionally, coherent receivers provide full-field information, which enables efficient temporal coherent combining of block repeated signals. This method allows system designers to trade excess link margin for increased data rate without requiring hardware modifications. We present experimental results that show a 45-dB scaling in data rate over a 41-dB range of input powers by block-repeating and combining a PRBS sequence up to 36,017 times. Keywords: digital signal processing, optical receivers, phase shift keying, coherent combining
MIT Department
Lincoln Laboratory
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1117/12.2218082
