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Experimental Evaluation of Impairments in Unrepeatered DP-16QAM Link with Distributed Raman Amplification
- Source :
- Photonics, Vol 4, Iss 1, p 16 (2017)
- Publication Year :
- 2017
- Publisher :
- MDPI AG, 2017.
-
Abstract
- The transmission impairments of a Raman amplified link using dual-polarization 16-quadrature amplitude modulation (DP-16QAM) are experimentally characterized. The impact of amplitude and phase noise on the signal due to relative intensity noise (RIN) transfer from the pump are compared for two pumping configurations: first-order backward pumping and bi-directional pumping. Experimental results indicate that with increased Raman backward pump power, though the optical signal-to-noise ratio (OSNR) is increased, so is the pump-induced amplitude and phase noise. The transmission performance is firstly improved by the enhanced OSNR at a low pump power until an optimum point is reached, and then the impairments due to pump-induced noise start to dominate. However, the introduction of a low pump power in the forward direction can further improve the system’s performance.
Details
- Language :
- English
- ISSN :
- 23046732
- Volume :
- 4
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Photonics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.1d12bd3c614f4568bf904481fec4cef3
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/photonics4010016