A High Spectral Efficiency Radio Over Fiber Link Based on Coherent Detection and Digital Phase Noise Cancellation
| Autor: | Jianping Yao, Peng Li, Ruoshi Xu, Lianshan Yan, Zheng Dai, Zhenguo Lu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
optical polarization
Local oscillator optical noise Physics::Optics 02 engineering and technology laser frequency offset optical transmitters 020210 optoelectronics & photonics Optics Radio over fiber radio over fiber (RoF) masers Optical Carrier transmission rates Phase noise 0202 electrical engineering electronic engineering information engineering digital signal processing (DSP) Digital signal processing laser phase noise receivers Physics optical modulation business.industry Optical polarization Atomic and Molecular Physics and Optics coherent detection optical receivers phase noise cancellation business Phase modulation Quadrature amplitude modulation |
| Zdroj: | Journal of Lightwave Technology. 39:6443-6449 |
| ISSN: | 1558-2213 0733-8724 |
| DOI: | 10.1109/jlt.2021.3104466 |
| Popis: | An approach to transmitting two independent microwave vector signals on a single optical carrier with one polarization state based on coherent detection and digital phase noise cancellation is proposed and experimentally demonstrated. At the transmitter, two independent microwave vector signals are modulated on an optical carrier via a dual-drive Mach-Zehnder modulator (DD-MZM). The modulated optical signals are transmitted over a single-mode fiber (SMF) and sent to a coherent receiver. At the receiver, the optical signals are detected where a local oscillator (LO) optical wave generated by a second free-running laser source is also applied. To recover the two microwave vector signals, a novel digital signal processing (DSP) algorithm is developed and applied to eliminate the joint phase noise terms from the transmitter and the LO laser sources as well as the unstable offset frequency between the two laser sources. An experiment is performed. The transmission of two independent 16 quadrature amplitude modulation (16-QAM) microwave vector signals at 4 GHz with a symbol rate of 1 GSymb/s over a 9-km SMF is demonstrated. The transmission performance in terms of error vector magnitudes (EVMs) and bit error rates (BERs) is also evaluated. |
| Databáze: | OpenAIRE |
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