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The advanced LIGO input optics.

Chris L Mueller1, Muzammil A Arain1, Giacomo Ciani1

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This summary is machine-generated.

Advanced LIGO gravitational wave detectors are nearing their target sensitivity. The input optics subsystem was custom-designed to prepare laser beams for unprecedented sensitivity to gravitational waves.

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Area of Science:

  • Astrophysics
  • Optical Engineering
  • Gravitational Wave Detection

Background:

  • Advanced LIGO detectors are approaching design sensitivity for astrophysical data collection.
  • Resonant optical interferometers require high sensitivity to gravitational wave strains.
  • The input optics subsystem is crucial for achieving sub-attometer precision in interferometry.

Purpose of the Study:

  • To detail the custom design of input optics components for advanced LIGO.
  • To explain how these components meet stringent requirements for high-power laser beam preparation.
  • To present performance measurements validating the design's effectiveness.

Main Methods:

  • Custom design of critical input optics components for high power (100 mW - 150 W) and precision (sub-attometer).
  • Leveraging experience from Initial LIGO and Enhanced LIGO operations.
  • Component testing and performance validation against design specifications.

Main Results:

  • Successful custom design of input optics subsystems meeting extreme operating conditions.
  • Demonstrated ability to prepare laser beams to sub-attometer precision.
  • Measurements confirm components perform to stringent design requirements.

Conclusions:

  • The custom-designed input optics are critical for advanced LIGO's sensitivity.
  • The components effectively prepare the laser beam for high-precision gravitational wave detection.
  • The design validates the engineering approach for future gravitational wave observatories.