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Implementation of a Reference Interferometer for Nanodetection
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Published on: April 26, 2014

Achromatic deep nulling with a three-dimensional Sagnac interferometer.

Kaito Yokochi1, Alexander V Tavrov, Jun Nishikawa

  • 1Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan. 50008834204@st.tuat.ac.jp

Optics Letters
|July 3, 2009
PubMed
Summary
This summary is machine-generated.

A novel 3-D Sagnac interferometer achieves achromatic nulling of light, enabling stable pi phase shifts. This technology is promising for detecting faint extrasolar planets.

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Area of Science:

  • Optics and Photonics
  • Interferometry
  • Astronomy Instrumentation

Background:

  • Sagnac interferometers are known for common-path structures, offering stability.
  • Achieving achromatic phase shifts in interferometers is crucial for broadband applications.
  • Direct detection of extrasolar planets requires high-contrast imaging techniques.

Purpose of the Study:

  • To develop and demonstrate a 3-D Sagnac interferometer capable of achromatic nulling.
  • To theoretically prove the achromaticity using Jones calculus.
  • To assess the interferometer's potential for extrasolar planet detection.

Main Methods:

  • Theoretical analysis using Jones calculus to demonstrate achromaticity.
  • Construction of a 3-D Sagnac interferometer experimental setup.
  • Experimental measurement of nulling characteristics using green and red laser light.

Main Results:

  • The 3-D Sagnac interferometer achromatically nulls light from an on-axis source.
  • Stable and achromatic pi phase shifts are achieved due to the common-path design.
  • Experimental measurements show nulling characteristics of approximately 10(-6) for simultaneous green and red laser light.

Conclusions:

  • The 3-D Sagnac interferometer successfully demonstrates achromatic nulling and stable phase shifts.
  • The theoretical framework of Jones calculus supports the interferometer's achromatic performance.
  • This interferometer presents a valuable tool for the direct detection of faint extrasolar planets.