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Dual-comb absolute distance measurement based on a dual-wavelength passively mode-locked laser

  • Baike Lin*
  • , Xin Zhao
  • , Mingzhao He
  • , Yingling Pan
  • , Jie Chen
  • , Shiying Cao
  • , Yige Lin
  • , Qiang Wang
  • , Zheng Zheng
  • , Zhanjun Fang
  • *Corresponding author for this work
  • National Institute of Metrology China
  • Tsinghua University
  • Beihang University
  • Wuhan University

Research output: Contribution to journalArticlepeer-review

Abstract

A new absolute distance measurement system is demonstrated in this paper, which is based on a dual-wavelength passive mode-locked fiber laser. By controlling the intracavity loss and spectral filtering, the cavity mode-locked by a single-wall carbon nanotube saturable absorber is able to generate two pulse trains at slightly different repetition rates simultaneously with high mutual coherence. Comparisons with the commercial interferometers located on the 80-m large-scale dimensional standard show a combined measurement uncertainty of 6 μ m + 1 × 10-7L (k = 2), in an averaging time of 1 s. Our compact dual-comb system provides a low-cost way for ranging, with continuous range, rapid measurement, and high resolution.

Original languageEnglish
Article number7106508
JournalIEEE Photonics Journal
Volume9
Issue number6
DOIs
StatePublished - Dec 2017

Keywords

  • Carbon nanotubes and confined systems
  • Erbium lasers
  • Heterodyning
  • Mode-locked lasers

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