Spectroscopically in situ traceable heterodyne frequency-scanning interferometry for distances up to 50 m. (1st July 2015)

• Record Type: Journal Article
• Authors: Prellinger, Günther; Meiners-Hagen, Karl; Pollinger, Florian
• Is Part Of: Measurement science & technology. Volume 26:Number 8(2015:Aug.)
• Publication Date: 2015-07-01
• Subjects: absolute distance measurement -- frequency-scanning interferometry -- Doppler-free saturation spectroscopy -- laser spectroscopy -- iodine -- external-cavity diode laser; Physical measurements -- Periodicals; Scientific apparatus and instruments -- Periodicals; Equipment and Supplies -- Periodicals; Science -- instrumentation -- Periodicals; Technology -- instrumentation -- Periodicals; Mesures physiques -- Périodiques; Physical measurements; Scientific apparatus and instruments; Periodicals; 502.87
• DOI: 10.1088/0957-0233/26/8/084003
• Languages: English
• ISSNs: 0957-0233

Abstract

Abstract: High-resolution saturation spectroscopy of iodine transitions at 637 nm is used to generate physically stable frequency reference markers for an interferometric absolute distance measurement based on frequency-scanning interferometry. Both experiments are performed simultaneously, posing severe challenges to the in principle well-established experimental techniques. The software-based enhancement of the signal-to-noise ratio is discussed in detail, as well as the demodulation and separation of the heterodyne interferometer signals. Verification measurements up to fifty meters indicate a relative measurement uncertainty well below 10 −6 .