A Raman-Pumped Dispersion and Nonlinearity Compensating Fiber For Fiber Optic Communications
An optical back propagation (OBP) technique using Raman pumped dispersion compensation fibers (DCF) is investigated to compensate for nonlinear impairments in WDM systems in real time. The proposed inline OBP module consists of an optical phase conjugator, amplifiers and a Raman pumped DCF. In order...
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IEEE
2020-01-01
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| author | Elham Bidaki Shiva Kumar |
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| description | An optical back propagation (OBP) technique using Raman pumped dispersion compensation fibers (DCF) is investigated to compensate for nonlinear impairments in WDM systems in real time. The proposed inline OBP module consists of an optical phase conjugator, amplifiers and a Raman pumped DCF. In order to suppress the nonlinear effects of the transmission fibers exactly, the power in the backpropagation fiber should increase exponentially with distance. This can be approximately achieved by using forward/backward Raman pumping of the dispersion compensating fiber (DCF). We introduce two configurations to realize the OBP. In this paper, we show that the OBP with forward/backward pumping provides 2.45 dB Q-factor gain compared to single-channel digital back propagation (DBP) when transmission distance is 1500 km for a WDM system with QAM-64. To minimize the variation of effective gain coefficient of the Raman pumped DCF as a function of distance, bidirectional pumping scheme which can provide the signal power profile closest to that required by the ideal OBP condition is proposed. The bidirectional pumping scheme provides a superior performance over forward/backward pumping and wideband DBP (i.e., DBP is applied on the entire WDM signal). Our numerical simulation results show that the bidirectional pumping scheme provides 7.6 dB and 5 dB advantage in Q-factor as compared to single-channel DBP and wideband DBP, respectively at a transmission distance of 5000 km. The maximum achievable reach of a long haul WDM system can be enhanced by <inline-formula><tex-math notation="LaTeX">$225\%$</tex-math></inline-formula> using bidirectional pumping scheme as compared to wideband DBP. |
| format | Article |
| id | doaj-art-3d400171a0dc40dd8e74e20d00a7139c |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | IEEE |
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| spelling | doaj-art-3d400171a0dc40dd8e74e20d00a7139c2025-08-20T02:42:01ZengIEEEIEEE Photonics Journal1943-06552020-01-0112111710.1109/JPHOT.2019.29472138867979A Raman-Pumped Dispersion and Nonlinearity Compensating Fiber For Fiber Optic CommunicationsElham Bidaki0https://orcid.org/0000-0002-7541-7076Shiva Kumar1https://orcid.org/0000-0002-9012-2882Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON, CanadaDepartment of Electrical and Computer Engineering, McMaster University, Hamilton, ON, CanadaAn optical back propagation (OBP) technique using Raman pumped dispersion compensation fibers (DCF) is investigated to compensate for nonlinear impairments in WDM systems in real time. The proposed inline OBP module consists of an optical phase conjugator, amplifiers and a Raman pumped DCF. In order to suppress the nonlinear effects of the transmission fibers exactly, the power in the backpropagation fiber should increase exponentially with distance. This can be approximately achieved by using forward/backward Raman pumping of the dispersion compensating fiber (DCF). We introduce two configurations to realize the OBP. In this paper, we show that the OBP with forward/backward pumping provides 2.45 dB Q-factor gain compared to single-channel digital back propagation (DBP) when transmission distance is 1500 km for a WDM system with QAM-64. To minimize the variation of effective gain coefficient of the Raman pumped DCF as a function of distance, bidirectional pumping scheme which can provide the signal power profile closest to that required by the ideal OBP condition is proposed. The bidirectional pumping scheme provides a superior performance over forward/backward pumping and wideband DBP (i.e., DBP is applied on the entire WDM signal). Our numerical simulation results show that the bidirectional pumping scheme provides 7.6 dB and 5 dB advantage in Q-factor as compared to single-channel DBP and wideband DBP, respectively at a transmission distance of 5000 km. The maximum achievable reach of a long haul WDM system can be enhanced by <inline-formula><tex-math notation="LaTeX">$225\%$</tex-math></inline-formula> using bidirectional pumping scheme as compared to wideband DBP.https://ieeexplore.ieee.org/document/8867979/Nonlinear impairmentsoptical back propagationraman amplification. |
| spellingShingle | Elham Bidaki Shiva Kumar A Raman-Pumped Dispersion and Nonlinearity Compensating Fiber For Fiber Optic Communications IEEE Photonics Journal Nonlinear impairments optical back propagation raman amplification. |
| title | A Raman-Pumped Dispersion and Nonlinearity Compensating Fiber For Fiber Optic Communications |
| title_full | A Raman-Pumped Dispersion and Nonlinearity Compensating Fiber For Fiber Optic Communications |
| title_fullStr | A Raman-Pumped Dispersion and Nonlinearity Compensating Fiber For Fiber Optic Communications |
| title_full_unstemmed | A Raman-Pumped Dispersion and Nonlinearity Compensating Fiber For Fiber Optic Communications |
| title_short | A Raman-Pumped Dispersion and Nonlinearity Compensating Fiber For Fiber Optic Communications |
| title_sort | raman pumped dispersion and nonlinearity compensating fiber for fiber optic communications |
| topic | Nonlinear impairments optical back propagation raman amplification. |
| url | https://ieeexplore.ieee.org/document/8867979/ |
| work_keys_str_mv | AT elhambidaki aramanpumpeddispersionandnonlinearitycompensatingfiberforfiberopticcommunications AT shivakumar aramanpumpeddispersionandnonlinearitycompensatingfiberforfiberopticcommunications AT elhambidaki ramanpumpeddispersionandnonlinearitycompensatingfiberforfiberopticcommunications AT shivakumar ramanpumpeddispersionandnonlinearitycompensatingfiberforfiberopticcommunications |