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Electronic Distance Measuring Instruments01:30

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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Implementation of a Reference Interferometer for Nanodetection
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Highly compact and easy-to-use optical chip interferometer with picometric performances.

W A Merzouk1, B Cagneau1, F Gardillou2

  • 1LISV, University of Versailles, 10-12 Avenue de l'Europe, 78140 Vélizy, France.

The Review of Scientific Instruments
|November 3, 2016
PubMed
Summary

We developed a compact optical chip interferometer using integrated waveguide technology for high-resolution sensing. This affordable sensor achieves 100 fm/√Hz resolution, suitable for various applications.

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Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Sensor Technology

Background:

  • Optical interferometers are crucial for high-precision measurements.
  • Existing systems can be bulky, expensive, or complex.
  • Integrated photonics offers a path to miniaturization and cost reduction.

Purpose of the Study:

  • To present a compact, inexpensive, and user-friendly optical chip interferometer.
  • To evaluate the sensor's resolution and noise performance.
  • To demonstrate its suitability for both static and dynamic measurements.

Main Methods:

  • Utilized telecom integrated waveguide technology for chip fabrication.
  • Characterized sensor performance using power spectral density analysis.
  • Assessed long-term stability with Allan deviation.
  • Evaluated dynamic response using piezoelectric actuation.

Main Results:

  • Achieved a power spectral density of 100 fm Hz-1/2 @ 10 kHz in static conditions.
  • Demonstrated consistent performance for short and long-term measurements via Allan deviation.
  • Successfully performed sub-nanometer dynamic measurements.
  • Identified a potential sensor bandwidth limited only by electronics to 250 kHz.

Conclusions:

  • The developed optical chip interferometer is compact, cost-effective, and easy to use.
  • It offers excellent resolution and low noise levels suitable for precision sensing.
  • The sensor exhibits robust performance in both static and dynamic regimes with high potential bandwidth.