Absolute distance measurement with a gain-switched dual optical frequency comb

K. Hei, Kaszubowska Anandarajah, Eamonn P. Martin, Guang Shi, Prince M. Anandarajah, N. Bhattacharya

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Abstract

The measurement of distance plays an important role in many aspects of modern societies. In this paper, an absolute distance measurement method for arbitrary distance is proposed and demonstrated using mode-resolved spectral interferometry with a gain-switched dual comb. An accuracy of 12 µm, when compared to a He-Ne fringe counting laser interferometer, for a displacement up to 2.5 m is demonstrated by tuning the repetition frequency of the dual comb from 1.1 GHz to 1.4 GHz. The compact measurement system based on a gain-switched dual comb breaks the constraint of periodic ambiguity. The simplification and improvements are significant for further industrial applications.
Original languageEnglish
Pages (from-to)8108-8116
Number of pages9
JournalOptics Express
Volume29
Issue number6
DOIs
Publication statusPublished - 2021

Keywords

  • OA-Fund TU Delft

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