Journal
JOURNAL OF OPTICS
Volume 18, Issue 11, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/18/11/114002
Keywords
reconstruction; linear optical network; waveguide; chip; unitary transformation; characterization
Categories
Funding
- DAAD Jahresstipendium
- European Commission [323714, 613024, 608062, 641039]
- Vienna Center for Quantum Science and Technology (VCQ)
- Austrian Science Fund (FWF) [Y585-N20]
- Vienna Science and Technology Fund (WWTF) [ICT12-041]
- Air Force Office of Scientific Research, Air Force Material Command, United States Air Force [FA9550-1-6-1-0004]
- Austrian Science Fund (FWF) [Y585, W1210] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [Y 585] Funding Source: researchfish
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Linear optical elements are pivotal instruments in the manipulation of classical and quantum states of light. Recent progress in integrated quantum photonic technology enabled the implementation of large numbers of such elements on chip, in particular passively stable interferometers. However, it is a challenge to characterize the optical transformation of such a device as the individual optical elements are not directly accessible. Thus only an effective overall transformation can be recovered. Here we present a reconstruction approach based on a global optimization of element parameters and compare it to two prominently used approaches. We numerically evaluate their performance for networks up to 14 modes and various levels of error on the primary data.
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