Abstract
We demonstrate a novel low-cost photonic-layer secured communication system that incorporates intensity modulation direct detection (IM/DD) scheme with a 4-level pulse amplitude modulation (PAM-4). In the proposed system, the signal is buried under an amplifier’s spontaneous emission (ASE) noise and coded with a spectral phase mask. As a result, the signal is stealthy and encrypted in both frequency and time domains. We analyze the reception performance of the secured signal under direct detection, and analytically compare its SNR with a conventional PAM-4 system, demonstrating that only an eligible receiver achieves a decryption of the stealthy and encrypted signal. Furthermore, we experimentally validate these findings showing a significant processing gain, which allows an error-free reception, despite a negative optical-SNR.
| Original language | English |
|---|---|
| Pages (from-to) | 32691-32703 |
| Number of pages | 13 |
| Journal | Optics Express |
| Volume | 26 |
| Issue number | 25 |
| DOIs | |
| State | Published - 10 Dec 2018 |
Bibliographical note
Publisher Copyright:© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Funding
Israel Innovation Authority (53362); Cisco University Research Program (CG#1080109); Ben-Gurion University of the Negev; Bar-Ilan University.
| Funders | Funder number |
|---|---|
| Ben-Gurion University of the Negev |