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Optical Fiber Time Delay Comparison Between NIST and LAMETRO.

T Dennis1, J Jimenez1

  • 1National Institute of Standards and Technology, Boulder, CO 80305, USA.

Journal of Research of the National Institute of Standards and Technology
|December 7, 2022
PubMed
Summary
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A measurement comparison of optical fiber time delay between NIST and LAMETRO-ICE showed results within expected uncertainty. This validates precise optical fiber metrology between international laboratories.

Area of Science:

  • Metrology
  • Optical Engineering
  • Telecommunications

Background:

  • Accurate measurement of optical fiber time delay is crucial for high-speed data transmission.
  • International collaboration enhances the reliability and comparability of metrological standards.

Purpose of the Study:

  • To conduct a bilateral measurement comparison of optical fiber time delay.
  • To validate the measurement capabilities of NIST (USA) and LAMETRO-ICE (Costa Rica).

Main Methods:

  • Utilized a single-mode optical fiber reference spool.
  • Performed measurements at standard telecommunication wavelengths: 1310 nm and 1550 nm.
  • Compared time delay results between the two participating laboratories.

Main Results:

Keywords:
BIPMOTDRcommunicationsinternational comparisonmodulation phase shiftoptical fiberoptical time domain reflectometertime delay

Related Experiment Videos

  • The largest difference in measured time delay was less than 0.93 ns.
  • This difference was within the combined standard uncertainty (k=1) of the measurement systems.
  • Demonstrated agreement between NIST and LAMETRO-ICE measurement systems.

Conclusions:

  • The bilateral measurement comparison successfully validated the accuracy of optical fiber time delay measurements.
  • Results confirm the equivalence of metrological capabilities between NIST and LAMETRO-ICE.
  • The study supports international confidence in optical fiber metrology standards.