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Self-oscillating Optical Frequency Comb: Application to Low Phase Noise mm-wave Generation and Radio-over-Fiber Link

Hasanuzzaman, GKM; Kanno, A; Dat, PT; Iezekiel, S; (2018) Self-oscillating Optical Frequency Comb: Application to Low Phase Noise mm-wave Generation and Radio-over-Fiber Link. Journal of Lightwave Technology , 36 (19) pp. 4535-4542. 10.1109/JLT.2018.2844344. Green open access

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Abstract

A self-oscillating optical frequency comb generator (SOFCG) is demonstrated by applying the optoelectronic loop feedback to an optical frequency comb generator (OFCG) based on a dual-drive Mach–Zehnder modulator. The resulting SOFCG provides 23 comb lines with a frequency spacing of 11.84 GHz, corresponding to the oscillation frequency defined by the optoelectronic loop. The corresponding OFCG is also implemented by replacing the optoelectronic feedback loop with a microwave synthesizer at 11.84 GHz. A 94.8-GHz millimeter (mm)-wave signal is then generated by selecting two tones and heterodyning in a high-speed photodetector for both the SOFCG and the OFCG. The SOFCG system offers superior single sideband phase noise performance compared to the OFCG approach. Using the SOFCG developed here, it is possible to generate mm-wave signals up to 260 GHz, and this method is applicable to multiband radio-over-fiber (RoF) links. An RoF link is implemented with the SOFCG at 94.8 GHz. An LTE Advanced OFDM FDD 64-QAM signal of 20-MHz bandwidth is transmitted over a 1.3-m wireless distance.

Type: Article
Title: Self-oscillating Optical Frequency Comb: Application to Low Phase Noise mm-wave Generation and Radio-over-Fiber Link
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2018.2844344
Publisher version: https://doi.org/10.1109/JLT.2018.2844344
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: Optical mixing , Optical fibers , Optical amplifiers , Optical filters , Optical feedback , Generators
UCL classification: UCL > Provost and Vice Provost Offices
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/10070805
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