Philip Koch defends PhD

Congratulations to Philip Koch for successfully defending his PhD thesis titled “Design, Suspension and Optical Characterization of the Beam Splitter and Output Mode Cleaner for the AEI 10 m Prototype”. Philip’s thesis work covered a range of topics including:

  • the thickness homogeneity of crystalline AlGaAs/GaAs high reflectivity coatings
  • the design, construction and characterisation of the main sub-SQL Interferometer beam splitter and it’s triple suspension
  • building the “scatterometer” – an apparatus to characterise the scattered light produced by optics by measuring the bidirectional reflectivity distribution function (BRDF)
  • the design and construction of an outpupt mode cleaner cavity for the sub-SQL interferometer, with a measured intra-cavity loss of < 0.5%