High-fidelity and polarization-insensitive universal photonic processors fabricated by femtosecond laser writing
Author:
Pentangelo Ciro12ORCID, Di Giano Niki12ORCID, Piacentini Simone2ORCID, Arpe Riccardo1, Ceccarelli Francesco2ORCID, Crespi Andrea12ORCID, Osellame Roberto2ORCID
Affiliation:
1. Dipartimento di Fisica , Politecnico di Milano , Milano , Italy 2. Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche (IFN-CNR) , Milano , Italy
Abstract
Abstract
Universal photonic processors (UPPs) are fully programmable photonic integrated circuits that are key components in quantum photonics. With this work, we present a novel platform for the realization of low-loss, low-power, and high-fidelity UPPs based on femtosecond laser writing (FLW) and compatible with a large wavelength spectrum. In fact, we demonstrate different UPPs, tailored for operation at 785 nm and 1550 nm, providing similar high-level performances. Moreover, we show that standard calibration techniques applied to FLW-UPPs result in Haar random polarization-insensitive photonic transformations implemented with average amplitude fidelity as high as 0.9979 at 785 nm (0.9970 at 1550 nm), with the possibility of increasing the fidelity over 0.9990 thanks to novel optimization algorithms. Besides being the first demonstrations of polarization-insensitive UPPs, these devices show the highest level of control and reconfigurability ever reported for a FLW circuit. These qualities will be greatly beneficial to applications in quantum information processing.
Funder
Horizon 2020 Framework Programme Ministero dell’Università e della Ricerca
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
Reference28 articles.
1. F. Flamini, N. Spagnolo, and F. Sciarrino, “Photonic quantum information processing: a review,” Rep. Prog. Phys., vol. 82, no. 1, p. 016001, 2018. https://doi.org/10.1088/1361-6633/aad5b2. 2. H.-S. Zhong, et al.., “Quantum computational advantage using photons,” Science, vol. 370, no. 6523, pp. 1460–1463, 2020. https://doi.org/10.1126/science.abe8770. 3. L. S. Madsen, et al.., “Quantum computational advantage with a programmable photonic processor,” Nature, vol. 606, no. 7912, pp. 75–81, https://doi.org/10.1038/s41586-022-04725-x, 2022. 4. E. Pelucchi, et al.., “The potential and global outlook of integrated photonics for quantum technologies,” Nat. Rev. Phys., vol. 4, no. 3, pp. 194–208, 2022. https://doi.org/10.1038/s42254-021-00398-z. 5. W. Bogaerts, et al.., “Programmable photonic circuits,” Nature, vol. 586, no. 7828, pp. 207–216, 2020. https://doi.org/10.1038/s41586-020-2764-0.
|
|