Share Email Print
cover

Proceedings Paper • new

On-chip modulator-free optical transmitter for quantum and classical communications
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The practical combination of quantum cryptography and classical communications will require convergence of their technologies. In this pivotal time where both fields are transitioning towards photonic integrated architectures, it is essential to develop devices that fully leverage their hardware compatibilities, while still addressing the key issues of cost reduction, miniaturization and infrastructure energetic footprint, essential for future high- bandwidth, low-latency networks. Here, we address these issues by developing an on-chip transmitter consisting of just 3 building blocks but capable of transmitting both quantum encrypted photons and classical multi-level modulation signals. By combining optical injection locking and direct phase modulation we are able to encode pulse trains with multiple levels of differential phase, without the need of high-speed electro-optic modulators and their associated power footprint. We generate return-to-zero differential phase shift keying signals with up to 16 distinct levels. Moreover, we demonstrate multi-protocol quantum key distribution delivering state-of-the-art secure key rates. Our on-chip transmitter will facilitate the flexible combination of quantum and classical communications within a single, power-efficient device that can readily be integrated in existing high connectivity networks.

Paper Details

Date Published: 4 March 2019
PDF: 9 pages
Proc. SPIE 10921, Integrated Optics: Devices, Materials, and Technologies XXIII, 109210U (4 March 2019); doi: 10.1117/12.2516242
Show Author Affiliations
Taofiq Paraiso, Toshiba Research Europe Ltd. (United Kingdom)
Thomas Roger, Toshiba Research Europe Ltd. (United Kingdom)
Innocenzo De Marco, Toshiba Research Europe Ltd. (United Kingdom)
Univ. of Leeds (United Kingdom)
Davide G. Marangon, Toshiba Research Europe Ltd. (United Kingdom)
Mirko Sanzaro, Toshiba Research Europe Ltd. (United Kingdom)
James Dynes, Toshiba Research Europe Ltd. (United Kingdom)
Marco Lucamarini, Toshiba Research Europe Ltd. (United Kingdom)
Zhiliang Yuan, Toshiba Research Europe Ltd. (United Kingdom)
Andrew J. Shields, Toshiba Research Europe Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 10921:
Integrated Optics: Devices, Materials, and Technologies XXIII
Sonia M. García-Blanco; Pavel Cheben, Editor(s)

© SPIE. Terms of Use
Back to Top