28-GHz RoF Link Employing Optical Remote Heterodyne Techniques with Kramers–Kronig Receiver
We propose and demonstrate a 28-GHz optical remote heterodyne RoF link using KK receiver for the first time. An optical SSB modulated signal is obtained utilizing an IQ modulator and two free-running lasers. Due to its minimum phase property, KK algorithm can be adopted to reconstruct the complex 16-QAM signal from the received intensity signal. This scheme is effective in eliminating the SSBI penalty introduced by square-law detection. Through the use of the KK receiver, the power penalty caused by the 80 km SSMF transmission is found to be less than 1 dB with digital CDC post processing. The KK-based receiver can also provide about 2 dB advantage over the traditional receiver at the 7% HD-FEC threshold in the case of 28 GBaud rate transmission over 80 km fiber. Furthermore, as the baud rate increases, the benefit of KK receiving scheme is more obvious and superior than that of the traditional receiving scheme.
KeywordsMillimeter-wave Radio-over-fiber (RoF) Optical heterodyning Fiber optics communication
This work is supported by the National Natural Science Foundation of China (No. 61420106011 and 61471088) and the Fundamental Research Funds for the Central Universities (Grant No.ZYGX2016J014).
- 1.Insua, I.G., Plettemeier, D., Schäffer, C.G.: Simple remote heterodyne RoF system for Gbps wireless access. In: International Topical Meeting on Microwave Photonics, pp. 1–4. IEEE, Valencia, Spain (2009)Google Scholar
- 2.Latunde, A.T., Milosavljevic, M., Kourtessis, P., et al.: OQAM-OFDM RoF with IM-DD remote heterodyne 28 GHz upconversion for 5G millimeter RANs. In: International Conference on Transparent Optical Networks, pp. 1–4. IEEE, Trento, Italy (2016)Google Scholar
- 6.Chen, X., Antonelli, C., Chandrasekha, S., et al.: 218-Gb/s single-wavelength, single-polarization, single-photodiode transmission over 125-km of standard singlemode fiber using Kramers-Kronig detection. In: Optical Fiber Communications Conference and Exhibition, pp. 1–3. Optical Society of America, Los Angeles, USA (2017)Google Scholar
- 7.Mecozzi, A., Antonelli, C., Shtaif, M.: Kramers-Kronig Coherent Receiver. Opt. 3(11), 1220 (2016)Google Scholar
- 9.Fan, S.J., Zhuge, Q.B., et al.: Twin-SSB direct detection transmission over 80 km SSMF using Kramers-Kronig Receiver. In: European Conference on Optical Communication, pp. 1–3. IEEE, Gothenburg, Sweden (2017)Google Scholar