Hasanuzzaman, GKM;
Shams, H;
Renaud, CC;
Mitchell, J;
Seeds, AJ;
Iezekiel, S;
(2019)
Tunable THz Signal Generation and Radioover-Fiber Link based on an Optoelectronic Oscillator-driven Optical Frequency Comb.
Journal of Lightwave Technology
10.1109/jlt.2019.2953070.
(In press).
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Abstract
We propose and demonstrate experimentally a photonic THz signal generation technique based on a tunable optoelectronic oscillator (OEO), and its application in a radio over fiber (RoF) link. The OEO's is tuned by varying the bandwidth of a tunable optical bandpass filter (TOBF) that is cascaded with a phase modulator (PM). The resulting tunable microwave photonic filter is used to generate OEO oscillations from 6.58 GHz up to 18.36 GHz (with a phase noise of ≤−103dBc/Hz at 10 kHz offset from the carrier frequency). The OEO is subsequently used to drive an optical comb, generating 22 comb lines with a frequency spacing of 17.33 GHz covering a bandwidth of 360 GHz within a 20 dB envelope. By selecting two optical comb lines with a wavelength selective switch (WSS) and beating them in a uni-traveling carrier photodiode (UTC-PD), THz signals are generated at 101.5 GHz and 242.6 GHz with phase noise of -90 dBc/Hz and -78 dBc/Hz, respectively at 10 kHz offset from carrier frequency. Tunable mm-wave and THz signals can be generated either by changing the OEO oscillation frequency or the selected comb lines. Using the OEO driven OFCG, we implemented a RoF link at 242.6 GHz with a data rate of 24 Gbps over a wireless distance of 30 cm and with a bit error rate (BER) below the hard decision forward error correction (FEC) limit of 3.8×10−3 . This method allows the creation of an allphotonic frequency reconfigurable THz signal generator and RoF system.
| Type: | Article |
|---|---|
| Title: | Tunable THz Signal Generation and Radioover-Fiber Link based on an Optoelectronic Oscillator-driven Optical Frequency Comb |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/jlt.2019.2953070 |
| Publisher version: | https://doi.org/10.1109/jlt.2019.2953070 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Optoelectronic oscillator, Side mode suppression, Infiniteimpulse response, Allan deviation, Microwave photonics |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10085960 |
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