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On-Axis Optical Bench for Laser Ranging Instruments in Future Gravity Missions.

Yichao Yang1,2,3, Kohei Yamamoto1, Miguel Dovale Álvarez1

  • 1Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut) and Institut für Gravitationsphysik, Leibniz Universität Hannover, Callinstrasse 38, D-30167 Hannover, Germany.

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Summary
This summary is machine-generated.

Future gravity missions will use advanced laser interferometry for satellite-to-satellite ranging. This study designs an improved optical bench to boost performance and enable longer interferometer arms for enhanced space-based measurements.

Keywords:
GRACEheterodyne readoutinter-satellite ranginglaser interferometry

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Area of Science:

  • Space geodesy
  • Optical physics
  • Interferometry

Background:

  • The GRACE Follow-On mission demonstrated sub-nanometer precision laser ranging for inter-satellite tracking.
  • Future gravity missions are expected to utilize heterodyne laser interferometry for satellite-to-satellite ranging.

Purpose of the Study:

  • To present the design of an on-axis optical bench for next-generation laser ranging.
  • To enhance received optical power and transmit beam divergence for longer interferometer arms.
  • To reduce optical power requirements for laser assemblies.

Main Methods:

  • Computer simulations were used to verify design functionalities and requirements.
  • Thermal analysis was conducted to assess the optical bench's robustness to orbital temperature fluctuations.

Main Results:

  • The proposed optical bench design enhances received optical power and transmit beam divergence.
  • The design enables longer interferometer arms and relaxes laser power requirements.
  • Computer simulations confirmed the design's functionality and robustness.

Conclusions:

  • The developed on-axis optical bench is suitable for next-generation laser ranging systems.
  • This design advances space laser interferometry for future gravity missions.
  • The optical bench demonstrates robustness to environmental temperature variations.