Journal article · Preprint article
Hong–Ou–Mandel interference between independent III–V on silicon waveguide integrated lasers
Universita di Padova1
Nanophotonic Devices, Department of Photonics Engineering, Technical University of Denmark2
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark3
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark4
Fiber Optics, Devices and Non-linear Effects, Department of Photonics Engineering, Technical University of Denmark5
Department of Photonics Engineering, Technical University of Denmark6
Technical University of Denmark7
University of Grenoble8
Micro Photon Devices S.r.l.9
Politecnico di Milano10
...and 0 moreThe versatility of silicon photonic integrated circuits has led to a widespread usage of this platform for quantum information-based applications, including quantum key distribution (QKD). However, the integration of simple high-repetition-rate photon sources is yet to be achieved. The use of weak-coherent pulses (WCPs) could represent a viable solution.
For example, measurement device independent QKD (MDI-QKD) envisions the use of WCPs to distill a secret key immune to detector side channel attacks at large distances. Thus, the integration of III–V lasers on silicon waveguides is an interesting prospect for quantum photonics. Here we report the experimental observation of Hong–Ou–Mandel interference with 46 2% visibility between WCPs generated by two independent III–V on silicon waveguide integrated lasers.
This quantum interference effect is at the heart of many applications, including MDI-QKD. This Letter represents a substantial first step towards an implementation of MDI-QKD fully integrated in silicon and could be beneficial for other applications such as standard QKD and novel quantum communication protocols.
Language: | English |
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Year: | 2019 |
Pages: | 271-274 |
ISSN: | 15394794 and 01469592 |
Types: | Journal article and Preprint article |
DOI: | 10.1364/OL.44.000271 |
ORCIDs: | Cozzolino , Rottwitt, Karsten , Ding, Wenjun , Bacco, Davide , 0000-0003-0830-2057 and 0000-0003-4965-5801 |