Paper : Dynamic high-resolution spectroscopic frequency referencing for frequency sweeping interferometry. (25th April 2016)

• Record Type: Journal Article
• Authors: Prellinger, Günther; Meiners-Hagen, Karl; Florian Pollinger,
• Is Part Of: Surface topography. Volume 4:Number 2(2016:Apr./Jun.)
• Page Start: 024012
• Publication Date: 2016-04-25
• Subjects: Surfaces (Physics) -- Periodicals; Surfaces (Physics) -- Measurement -- Periodicals; 530.417
• DOI: 10.1088/2051-672X/4/2/024012
• Languages: English
• ISSNs: 2051-672X

Abstract

Abstract: A spectroscopic reference for the intrinsic frequency calibration of a ranging system based on frequency-sweeping interferometry (FSI) is presented. Saturation spectroscopy of iodine transitions at 636.8 nm is used to generate well-defined frequency markers. The experimental and analytic implementation is shown to enable in principle a frequency determination with an uncertainty of 0.17 MHz for a coverage factor k = 1. This corresponds to a relative standard uncertainty of $1.5\times {10}^{-7}$ as contribution to the combined measurement uncertainty of the FSI-based length measurement. But the analysis also reveals the high sensitivity of the actually achievable measurement uncertainty to the quality of the spectroscopic reference data.