A cryogenic multiaxis range-resolved laser interferometer

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dc.contributor.authorChristiansen, Adam J.
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorNaylor, David A.
dc.date.accessioned2024-01-25T21:03:15Z
dc.date.available2024-01-25T21:03:15Z
dc.date.issued2023
dc.degree.levelPh.D
dc.description.abstractBuilding upon the successes of previous far-infrared space astronomy missions that initially featured small but cold (<4 K) or large but warm telescopes, the future path is clear: the next generation of far-infrared telescopes must be both large and cold, which requires cryogenic cooling of the mirrors, instrumentation, and detectors. The precision to which the moving cryogenic components of the instrument must be measured and controlled demands a robust low power position metrology system, and a cryogenic multiaxis range-resolved laser interferometer using a sinusoidal frequency modulation (SFM) technique was investigated to solve this problem. The development included cryogenic considerations and characterization of several fibre and optical components, calibration of the selected hardware, and verification of the technique. Simultaneous multiaxis measurements were demonstrated at ambient and cryogenic temperatures of <6 K, and the measured performance under ambient conditions showed a resolution of ~50 pm and a stability of 0.4 nm rms in a 20 Hz bandwidth. The demonstrated performance exceeds that which is required by proposed far-infrared missions and distinguishes the SFM range-resolved laser interferometer as a leading candidate for future space-based applications.
dc.description.sponsorshipABB Ltd., Alberta Innovates, Blue Sky Spectroscopy Inc., Canada Foundation for Innovation, Canadian Microelectronics Corporation, Canadian Space Agency, Natural Sciences and Engineering Research Council of Canada, New Technologies for Canadian Observatories, and the University of Lethbridge.
dc.identifier.urihttps://hdl.handle.net/10133/6671
dc.language.isoen
dc.proquest.subject0752
dc.proquest.subject0464
dc.proquest.subject0598
dc.proquestyesYes
dc.publisherLethbridge, Alta. : University of Lethbridge, Dept. of Physics and Astronomy
dc.publisher.departmentDepartment of Physics and Astronomy
dc.publisher.facultyArts and Science
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)
dc.subjectLaser
dc.subjectMetrology
dc.subjectRange-resolved
dc.subjectInterferometry
dc.subjectCryogenic
dc.subjectOptics
dc.subjectPhotonics
dc.subjectFiber
dc.subjectFiber optics
dc.subjectAstronomy
dc.subjectAstrophysics
dc.subjectMultiaxis
dc.subjectMultiplexing
dc.subjectFPGA
dc.subjectSignal processing
dc.subjectDSP
dc.subjectRanging
dc.subjectDisplacement
dc.subjectFrequency modulation
dc.subjectEmbedded systems
dc.subjectFar-infrared
dc.subject.lcshFar infrared lasers
dc.subject.lcshLow temperature research
dc.subject.lcshDissertations, Academic
dc.titleA cryogenic multiaxis range-resolved laser interferometer
dc.typeThesis
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