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Nanosecond delay with subpicosecond uncertainty.

Donald R Larson1, Nicholas G Paulter

  • 1National Institute of Standards and Technology, Gaithersburg, MD 20899-8102, USA.

The Review of Scientific Instruments
|September 4, 2007
PubMed
Summary
This summary is machine-generated.

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A new system combining a trombone line and linear translation offers precise control over signal delays. This advancement significantly improves resolution and reduces uncertainty for time-delay measurements.

Area of Science:

  • Physics
  • Electrical Engineering
  • Metrology

Background:

  • Accurate control of signal delay is crucial in various scientific and engineering applications.
  • Existing methods for achieving variable signal delays often face limitations in resolution and uncertainty.

Purpose of the Study:

  • To develop an improved system for precise and reliable adjustment of coaxial signal delays.
  • To enhance the resolution and reduce the uncertainty of achievable time delays.

Main Methods:

  • Integration of a commercially available, variable-length coaxial delay line (trombone line).
  • Coupling the trombone line with a high-resolution linear translation system.
  • Systematic evaluation of delay range, resolution, uncertainty, drift, temperature dependence, repeatability, linearity, and hysteresis.

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Main Results:

  • Achieved a delay range from 0 ps to approximately 1250 ps.
  • Demonstrated a bidirectional resolution of 2.0 ps and a unidirectional resolution of 0.2 ps.
  • Established an uncertainty (95% confidence interval) in measured delay of +/-0.09 ps.

Conclusions:

  • The combined system offers superior performance in terms of resolution and uncertainty for variable signal delays.
  • The developed system provides a robust solution for applications requiring precise time-delay control.
  • Further characterization confirmed the system's stability and reliability across various parameters.