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

Author:

Yang YichaoORCID,Yamamoto KoheiORCID,Dovale Álvarez MiguelORCID,Wei DaikangORCID,Esteban Delgado Juan JoséORCID,Müller Vitali,Jia Jianjun,Heinzel GerhardORCID

Abstract

The laser ranging interferometer onboard the Gravity Recovery and Climate Experiment Follow-On mission proved the feasibility of an interferometric sensor for inter-satellite length tracking with sub-nanometer precision, establishing an important milestone for space laser interferometry and the general expectation that future gravity missions will employ heterodyne laser interferometry for satellite-to-satellite ranging. In this paper, we present the design of an on-axis optical bench for next-generation laser ranging which enhances the received optical power and the transmit beam divergence, enabling longer interferometer arms and relaxing the optical power requirement of the laser assembly. All design functionalities and requirements are verified by means of computer simulations. A thermal analysis is carried out to investigate the robustness of the proposed optical bench to the temperature fluctuations found in orbit.

Funder

Chinese Academy of Sciences

Max Planck Society

Deutsche Forschungsgemeinschaft

Clusters of Excellence “QuantumFrontiers: Light and Matter at the Quantum Frontier: Foundations and Applications in Metrology”

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry

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