Article Synopsis
- Imperfections in integrated photonics hinder the performance of interferometric systems, impacting advancements in quantum photonics.
- Advanced optimization techniques and reconfigurable devices are proposed to address these challenges.
- The study showcases a silicon photonic device achieving over 60 dB extinction ratio by using extra interferometers as adjustable beamsplitters, with an automated optimization algorithm compensating for manufacturing defects.
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Article Abstract
Imperfections in integrated photonics manufacturing have a detrimental effect on the maximal achievable visibility in interferometric architectures. These limits have profound implications for further technological developments in photonics and in particular for quantum photonic technologies. Active optimization approaches, together with reconfigurable photonics, have been proposed as a solution to overcome this. In this Letter, we demonstrate an ultrahigh (>60 dB) extinction ratio in a silicon photonic device consisting of cascaded Mach-Zehnder interferometers, in which additional interferometers function as variable beamsplitters. The imperfections of fabricated beamsplitters are compensated using an automated progressive optimization algorithm with no requirement for pre-calibration. This work shows the possibility of integrating and accurately controlling linear-optical components for large-scale quantum information processing and other applications.
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| http://dx.doi.org/10.1364/OL.41.005318 | DOI Listing |
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