Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

A Measurement of Propagation Delay

Published

Author(s)

Donald R. Larson, Nicholas Paulter

Abstract

A measurement method and associated uncertainty analysis have been developed for the measurement of propagation or group delay in electrical transmission lines and optical fibers. The measurement method and uncertainty analysis were applied to measurements of optical fiber delay lines that introduce tens of microseconds of delay (1 km, 2 km, and 4 km fiber lengths) and trombone lines that introduce sub-nanosecond delays. For the measurement method described here, uncertainties in the measured delay are as low as 90 fs (95 % confidence interval) for a propagation delay of 660 ps and less than 200 ps (95 % confidence interval) for a propagation delay of 20 ?s.
Citation
Metrologia
Volume
44
Issue
1

Keywords

Propagation Delay, picosecond, transmission line, optical fiber, coaxial cable

Citation

Larson, D. and Paulter, N. (2007), A Measurement of Propagation Delay, Metrologia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32307 (Accessed June 16, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created January 15, 2007, Updated October 12, 2021