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PhD thesis in Quantum metrology, Institute of Physics of Nice

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Français - Anglais

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General information

Reference : UMR7010-LAULAB-002
Workplace : NICE
Date of publication : Tuesday, October 01, 2019
Scientific Responsible name : Tanzilli
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 12 November 2019
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly

Description of the thesis topic

This PhD aims at pushing the quantum supremacy forward for overcoming current limitations in the characterization of materials and fiber optical properties such as refractive index, CD, and higher order properties. By applying those quantum optics methods to novel fiber designs, nonlinear models and architectures will be devised, and their integration in new generation fiber-laser systems will be targeted. This internship work plan wil consist of developing a CD fully operational test-benches based on ultra- broadband sources of entangled photons over the entire telecom C-band, as well as at shorter wavelengths (1064 and 532 nm)

Work Context

Quantum mechanics sets the ultimate limit on the accuracy of any measurement, therefore, Quantum metrology utilises quantum effects to enhance precision beyond that possible through classical approaches. On the other hand, fiber optics technology has revolutionized our society, with major impacts on our daily- life and R&D progress. Telecom fiber systems are the backbone of today's high-speed optical communication links, while specific fiber lasers are exploited in various domains, from medical treatment (cancer fighting, skin cleaning, surgery) to material processing (cutting, ablation).
Specialty fibers, such as photonic crystal or rare-earth doped fibers, are key components for high- stability, ultra-compact and reliable laser architectures, having tailored specifications in terms of spectral range and bandwidth, brightness and duration, as well as wavelength-agility. Further breakthroughs in FOT yet imply improving the knowledge and control on specialty fiber optical properties and manufacturing in a bottom-up approach. A tremendous effort is thus devoted at both the academic and industrial levels. Namely, more reliable and accurate measurement would permit to refine elaboration and fabrication processes, to improve numerical modelling, and to develop innovative laser systems with performances overcoming the state-of-the-art, and eventually to speed up technological transfers to the industry and related markets.
In this perspective, photonic quantum metrology is regarded as an enabling technology for assessing material optical properties with unprecedented capabilities. InPhyNi has recently demonstrated the concept of quantum white-light interferometry that allows absolute measurement of chromatic dispersion (CD) with ~3 times improved accuracies compared to state of the art realizations at telecom wavelength. This quantum- based method therefore shows a significant supremacy over standard approaches, defining a new benchmark in the field.

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