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Arbitrary Phase Access for Stable Fiber Interferometers
Author(s) -
Roztocki Piotr,
MacLellan Benjamin,
Islam Mehedi,
Reimer Christian,
Fischer Bennet,
Sciara Stefania,
Helsten Robin,
Jestin Yoann,
Cino Alfonso,
Chu Sai T.,
Little Brent,
Moss David J.,
Kues Michael,
Morandotti Roberto
Publication year - 2021
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.202000524
Subject(s) - photonics , interferometry , physics , multiplexing , optics , computer science , optical fiber , signal processing , polarization (electrochemistry) , electronic engineering , telecommunications , digital signal processing , computer hardware , engineering , chemistry
Well‐controlled yet practical systems that give access to interference effects are critical for established and new functionalities in ultrafast signal processing, quantum photonics, optical coherence characterization, etc. Optical fiber systems constitute a central platform for such technologies. However, harnessing optical interference in a versatile and stable manner remains technologically costly and challenging. Here, degrees of freedom native to optical fibers, i.e., polarization and frequency, are used to demonstrate an easily deployable technique for the retrieval and stabilization of the relative phase in fiber interferometric systems. The scheme gives access (without intricate device isolation) to <1.3 × 10 −3 π rad error signal Allan deviation across 1 ms to 1.2 h integration times for all tested phases, ranging from 0 to 2π. More importantly, the phase‐independence of this stability is shown across the full 2π range, granting access to arbitrary phase settings, central for, e.g., performing quantum projection measurements and coherent pulse recombination. Furthermore, the scheme is characterized with attenuated optical reference signals and single‐photon detectors, and extended functionality is demonstrated through the use of pulsed reference signals (allowing time‐multiplexing of both main and reference signals). Finally, the scheme is used to demonstrate radiofrequency‐controlled interference of high‐dimensional time‐bin entangled states.