Design of a tilted-transmissive-plate-based point-ahead-angle unit with ultra-low tilt-to-length coupling noise for spaceborne laser interferometry.

Authors

Yan Chen, Fan Zhu, Huafeng Tang, Jiaxi Dong, Luo Xu, Qinshun Chen, Shanqing Yang

Published in

Journal of the Optical Society of America. A, Optics, image science, and vision. Volume 43. Issue 7. Pages 1105-1115. Jul 01, 2026.

Abstract

A tilted-transmissive-plate-based point-ahead angle unit (PAAU) is proposed for spaceborne laser interferometry to achieve ultra-low tilt-to-length (TTL) coupling noise under TianQin mission requirements. An analytical model is developed incorporating angular jitter, parasitic motion, and geometric misalignment through lever-arm, piston, beam-offset, and transmissive-medium effects, enabling identification of key influencing factors. A sensitivity-guided tolerance-allocation method is applied to derive component-level requirements. Monte Carlo simulations demonstrate a total TTL coupling noise of 6.21×10^-14m/Hz^1/2 in the 0.1 mHz-1 Hz band, meeting the allocated budget. Compared with representative existing designs, the proposed PAAU relaxes critical tolerances by mitigating first-order translational coupling, providing improved feasibility for high-precision intersatellite interferometry.

PMID:
42863040
Bibliographic data and abstract were imported from PubMed on 13 Oct 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.