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Foundry fabricated photonic integrated circuit optical phase lock loop

Bałakier, K; Fice, MJ; Ponnampalam, L; Graham, CS; Wonfor, A; Seeds, AJ; Renaud, CC; (2017) Foundry fabricated photonic integrated circuit optical phase lock loop. Optics Express , 25 (15) pp. 16888-16897. 10.1364/OE.25.016888. Green open access

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Abstract

This paper describes the first foundry-based InP photonic integrated circuit (PIC) designed to work within a heterodyne optical phase locked loop (OPLL). The PIC and an external electronic circuit were used to phase-lock a single-line semiconductor laser diode to an incoming reference laser, with tuneable frequency offset from 4 GHz to 12 GHz. The PIC contains 33 active and passive components monolithically integrated on a single chip, fully demonstrating the capability of a generic foundry PIC fabrication model. The electronic part of the OPLL consists of commercially available RF components. This semi-packaged system stabilizes the phase and frequency of the integrated laser so that an absolute frequency, high-purity heterodyne signal can be generated when the OPLL is in operation, with phase noise lower than −100 dBc/Hz at 10 kHz offset from the carrier. This is the lowest phase noise level ever demonstrated by monolithically integrated OPLLs.

Type: Article
Title: Foundry fabricated photonic integrated circuit optical phase lock loop
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/OE.25.016888
Publisher version: http://doi.org/10.1364/OE.25.016888
Language: English
Additional information: Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Keywords: Photonic integrated circuits; Optoelectronics; Integrated optics devices; Heterodyne; Radio frequency photonics; Laser stabilization
UCL classification: UCL
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/1569330
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