Polarization-Insensitive Remote Access Unit for Radio-Over-Fiber Mobile Fronthaul System by Reusing Polarization Orthogonal Light Waves
To reduce the complexity and cost of remote access units (RAUs), colorless transport architecture is preferred in a wavelength-division multiplexing (WDM) system. The wavelength-reuse technique is commonly adopted to realize colorless RAUs. However, in traditional approaches, RAUs employ crystal-bas...
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2016-01-01
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| author | Beilei Wu Jiun-Yu Sung Jhih-Heng Yan Mu Xu Jing Wang Fengping Yan Shuisheng Jian Gee-Kung Chang |
| author_facet | Beilei Wu Jiun-Yu Sung Jhih-Heng Yan Mu Xu Jing Wang Fengping Yan Shuisheng Jian Gee-Kung Chang |
| author_sort | Beilei Wu |
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| description | To reduce the complexity and cost of remote access units (RAUs), colorless transport architecture is preferred in a wavelength-division multiplexing (WDM) system. The wavelength-reuse technique is commonly adopted to realize colorless RAUs. However, in traditional approaches, RAUs employ crystal-based Mach–Zehnder modulators (MZMs) to modulate the distributed carriers. Hence, polarization tracking systems are necessary to align the polarization state of the distributed carriers with the MZM principal axis. This increases the cost of the RAUs. In this paper, a full-duplex millimeter-wave (MMW) radio-over-fiber (RoF) access architecture employing polarization-insensitive RAUs is proposed. In our proposed RAUs, the upstream signals are generated using polarization-orthogonal lights, and the performance of the upstream signals is independent of the polarization state of the MZM input lights. The proposed system is mathematically formulated and experimentally demonstrated. The 1.2-Gb/s quadrature phase-shift keying (QPSK) orthogonal frequency-division multiplexing (OFDM) downstream signal at the 60-GHz band and 5-Gb/s on–off keying (OOK) polarization-insensitive upstream signal over a 15-km standard single-mode fiber (SSMF) are demonstrated. In our results, a polarization-insensitive RAU is successfully obtained. The power penalty resulting from the interference of downstream signal is about 0.4 and 0.6 dB with a bit error rate (BER) of <inline-formula> <tex-math notation="LaTeX">$10^{-9} $</tex-math></inline-formula> in back-to-back and 15-km fiber transmission, respectively. |
| format | Article |
| id | doaj-art-5398313f13ce4e5b924e39658c66b009 |
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| language | English |
| publishDate | 2016-01-01 |
| publisher | IEEE |
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| series | IEEE Photonics Journal |
| spelling | doaj-art-5398313f13ce4e5b924e39658c66b0092025-08-20T03:15:47ZengIEEEIEEE Photonics Journal1943-06552016-01-01811810.1109/JPHOT.2015.25084267355291Polarization-Insensitive Remote Access Unit for Radio-Over-Fiber Mobile Fronthaul System by Reusing Polarization Orthogonal Light WavesBeilei Wu0Jiun-Yu Sung1Jhih-Heng Yan2Mu Xu3Jing Wang4Fengping Yan5Shuisheng Jian6Gee-Kung Chang7Institute of Lightwave Technology, Key Lab of All Optical Network and Advanced Telecommunication of EMC, Beijing Jiaotong University, Beijing, ChinaSchool of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USASchool of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USASchool of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USASchool of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USAInstitute of Lightwave Technology, Key Lab of All Optical Network and Advanced Telecommunication of EMC, Beijing Jiaotong University, Beijing, ChinaInstitute of Lightwave Technology, Key Lab of All Optical Network and Advanced Telecommunication of EMC, Beijing Jiaotong University, Beijing, ChinaSchool of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USATo reduce the complexity and cost of remote access units (RAUs), colorless transport architecture is preferred in a wavelength-division multiplexing (WDM) system. The wavelength-reuse technique is commonly adopted to realize colorless RAUs. However, in traditional approaches, RAUs employ crystal-based Mach–Zehnder modulators (MZMs) to modulate the distributed carriers. Hence, polarization tracking systems are necessary to align the polarization state of the distributed carriers with the MZM principal axis. This increases the cost of the RAUs. In this paper, a full-duplex millimeter-wave (MMW) radio-over-fiber (RoF) access architecture employing polarization-insensitive RAUs is proposed. In our proposed RAUs, the upstream signals are generated using polarization-orthogonal lights, and the performance of the upstream signals is independent of the polarization state of the MZM input lights. The proposed system is mathematically formulated and experimentally demonstrated. The 1.2-Gb/s quadrature phase-shift keying (QPSK) orthogonal frequency-division multiplexing (OFDM) downstream signal at the 60-GHz band and 5-Gb/s on–off keying (OOK) polarization-insensitive upstream signal over a 15-km standard single-mode fiber (SSMF) are demonstrated. In our results, a polarization-insensitive RAU is successfully obtained. The power penalty resulting from the interference of downstream signal is about 0.4 and 0.6 dB with a bit error rate (BER) of <inline-formula> <tex-math notation="LaTeX">$10^{-9} $</tex-math></inline-formula> in back-to-back and 15-km fiber transmission, respectively.https://ieeexplore.ieee.org/document/7355291/Radio-over-fiber (RoF)remote access unitspolarization-insensitive |
| spellingShingle | Beilei Wu Jiun-Yu Sung Jhih-Heng Yan Mu Xu Jing Wang Fengping Yan Shuisheng Jian Gee-Kung Chang Polarization-Insensitive Remote Access Unit for Radio-Over-Fiber Mobile Fronthaul System by Reusing Polarization Orthogonal Light Waves IEEE Photonics Journal Radio-over-fiber (RoF) remote access units polarization-insensitive |
| title | Polarization-Insensitive Remote Access Unit for Radio-Over-Fiber Mobile Fronthaul System by Reusing Polarization Orthogonal Light Waves |
| title_full | Polarization-Insensitive Remote Access Unit for Radio-Over-Fiber Mobile Fronthaul System by Reusing Polarization Orthogonal Light Waves |
| title_fullStr | Polarization-Insensitive Remote Access Unit for Radio-Over-Fiber Mobile Fronthaul System by Reusing Polarization Orthogonal Light Waves |
| title_full_unstemmed | Polarization-Insensitive Remote Access Unit for Radio-Over-Fiber Mobile Fronthaul System by Reusing Polarization Orthogonal Light Waves |
| title_short | Polarization-Insensitive Remote Access Unit for Radio-Over-Fiber Mobile Fronthaul System by Reusing Polarization Orthogonal Light Waves |
| title_sort | polarization insensitive remote access unit for radio over fiber mobile fronthaul system by reusing polarization orthogonal light waves |
| topic | Radio-over-fiber (RoF) remote access units polarization-insensitive |
| url | https://ieeexplore.ieee.org/document/7355291/ |
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