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Related Concept Videos

Interference and Diffraction02:18

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Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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In IR spectroscopy, signals produced by the X−H bonds (such as C−H, O−H, or N−H) can be observed in the frequency range of  2700–4000 cm–1. The C−H stretching vibration forms sharp bands in the region 2850–3000 cm–1. The presence of the O−H stretching vibration leads to the forming of an absorption band in the frequency range 3650–3200 cm−1. At the same time, N−H stretching can be confirmed by absorption bands in the 3500–3100 cm−1 range. Even though both O−H and N−H bonds vibrate at a similar...
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Updated: May 14, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Frequency stabilization for space-based missions using optical fiber interferometry.

Terry G McRae1, Silvie Ngo, Daniel A Shaddock

  • 1National Measurement Institute, Lindfield, New South Wales, Australia. terry.mcrae@measurement.gov.au

Optics Letters
|February 6, 2013
PubMed
Summary
This summary is machine-generated.

We developed a fiber optic laser frequency reference for space missions. This robust system achieves high stability, making it suitable for gravity recovery and climate experiments.

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Area of Science:

  • Physics
  • Optical Engineering
  • Astrophysics

Background:

  • Laser frequency references are crucial for high-precision measurements in space.
  • Traditional references face challenges with size, weight, and robustness for space applications.
  • Optical fiber interferometers offer potential advantages for space-based laser stabilization.

Purpose of the Study:

  • To present measurement results for an all-optical fiber Michelson interferometer as a laser frequency reference.
  • To evaluate its performance at low frequencies (down to 1 mHz).
  • To assess its suitability for space-based gravity recovery and climate experiment missions.

Main Methods:

  • Implementation of an all-optical fiber Michelson interferometer.
  • Measurement of laser frequency stability at frequencies as low as 1 mHz.
  • Analysis of the interferometer's performance characteristics relevant to space missions.

Main Results:

  • Demonstrated measurement results for the fiber interferometer down to 1 mHz.
  • Confirmed the physical robustness, small size, and lightweight nature of optical fiber for space.
  • Showcased the potential for prestabilizing lasers on distant spacecraft using the interferometer's small free spectral range.
  • Achieved a stability of 30 Hz/√Hz over a 10 mHz-1 Hz bandwidth.

Conclusions:

  • All-optical fiber Michelson interferometers are viable candidates for future space missions.
  • They meet the stringent stability requirements for laser-based gravity recovery and climate experiments.
  • The technology offers advantages in robustness and operational flexibility for space-based applications.