Tough, EJ;
Fice, MJ;
Renaud, CC;
Seddon, J;
Seeds, AJ;
Graham, C;
Balakier, K;
(2021)
InP Photonic Integrated Circuit for 6.7GHz Spaced Optical Frequency Comb Generator.
In:
2021 International Topical Meeting on Microwave Photonics (MWP).
IEEE: Pisa, Italy.
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Abstract
We have demonstrated a novel approach to photonically integrated optical frequency comb generation on Indium Phosphide (InP) using generic foundry platforms. The optical comb utilized a recirculating loop technique to generate 59 comb lines (within a 20 dB power envelope) which are separated by 6.7 GHz frequency spacing. All comb lines exhibit strong phase coherence as characterized by low phase noise measurements of -105 dBc/Hz at 100 kHz. The choice of InP as an integration platform allowed for an immediate optical amplification of the modulated sideband tones. This approach reduced the requirement for external high-power RF amplifiers and therefore made the entire system more compact and power efficient. The amplified recirculating loop comb occupied 6 x 0.7 mm2 area of InP chip and consisted of electro-optic phase modulator (EOPM) and semiconductor optical amplifier (SOA) components embedded within a short (12 mm long) waveguide loop, such that the round-trip loop frequency corresponding to the loop optical length equated to 6.7 GHz. Modulation frequencies equal to the round-trip loop frequency were used to generate broad comb spans.
| Type: | Proceedings paper |
|---|---|
| Title: | InP Photonic Integrated Circuit for 6.7GHz Spaced Optical Frequency Comb Generator |
| Event: | 2021 International Topical Meeting on Microwave Photonics (MWP) |
| Dates: | 15 Nov 2021 - 17 Nov 2021 |
| ISBN-13: | 9781665426107 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/MWP53341.2021.9639427 |
| Publisher version: | https://doi.org/10.1109/MWP53341.2021.9639427 |
| 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: | Semiconductor optical amplifiers, Frequency locked loops, Frequency modulation, Stimulated emission, Phase modulation, Optical harmonic generation, Optical noise, Photonic integrated circuits, Optical frequency combs |
| UCL classification: | 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10144669 |
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