Quantum-limited measurements of distance fluctuations with a multimode detector. (12th July 2017)

• Record Type: Journal Article
• Authors: Thiel, Valérian; Roslund, Jonathan; Jian, Pu; Fabre, Claude; Treps, Nicolas
• Is Part Of: Quantum science and technology. Volume 2:Number 3(2017)
• Publication Date: 2017-07-12
• Subjects: metrology -- Interferometry -- quantum optics -- ranging -- multimode; Quantum theory -- Periodicals; Quantum theory; Periodicals; 530
• DOI: 10.1088/2058-9565/aa77d3
• Languages: English
• ISSNs: 2058-9565

Abstract

Abstract: An experimental scheme is introduced to measure multiple parameters that are encoded in the phase quadrature of a light beam. Using a modal description and a spectrally resolved homodyne detection, it is shown that all of the information is collected simultaneously, such that a single measurement allows extracting the value of multiple parameters post-facto . With a femtosecond laser source, we apply this scheme to a measurement of the delay between two pulses with a shot-noise limited sensitivity as well as extracting the dispersion value of a dispersive medium.