Optical truss interferometer for the LISA telescope Academic Article uri icon


  • The Laser Interferometer Space Antenna telescopes must exhibit an optical path length stability of pm/Hz in the mHz observation band to meet mission requirements. The optical truss interferometer is a proposed method to aid in the ground testing of the telescopes, as well as a risk-mitigation plan for flight units. This consists of three FabryPerot cavities mounted to the telescope, which are used to monitor structural displacements. We have designed and developed a fiber-based cavity injection system that integrates fiber components, mode matching optics, and a cavity input mirror into a compact input stage. The input stages, paired with return mirror stages, can be mounted to the telescope to form optical truss cavities. We performed a thorough sensitivity analysis using various simulation methods to support the fabrication and assembly of three first-generation prototype cavities, each of which exhibited satisfactory performance based on our models.

published proceedings


author list (cited authors)

  • Jersey, K., Harley-Trochimczyk, I., Zhang, Y., & Guzman, F.

citation count

  • 2

complete list of authors

  • Jersey, Kylan||Harley-Trochimczyk, Ian||Zhang, Yanqi||Guzman, Felipe

publication date

  • July 2023