{"id":{"repo_id":"lethbridge","oai_identifier":"oai:opus.uleth.ca:10133/6068"},"canonical_url":"https://search.dev.ndltd.org/etd/lethbridge/oai:opus.uleth.ca:10133/6068","repository":{"repo_id":"lethbridge","name":"University of Lethbridge","base_url":"https://opus.uleth.ca/server/oai/request"},"display":{"title":"Exploring the challenges of a far-infrared post-dispersed polarising Fourier transform spectrometer","abstract":"Recent advances in superconducting far-infrared (FIR) bolometer detectors have resulted in increases to their sensitivity of at least two orders of magnitude over broadband detectors flown on previous far-infrared spaceborne astronomy instruments. Such sensitivity means that observations employing a Fourier transform spectrometer (FTS) will require techniques to reduce the spectral bandwidth of a detector to limit the photon noise. The proposed SPICA SAFARI instrument employs grating spectrometers to post-disperse the light that has been modulated by a polarizing FTS onto a detector array: a post-dispersed polarizing FTS (PDPFTS). This thesis presents the development of a FIR PDPFTS consisting of a FTS and grating spectrometer. The challenges of phase correction given the narrow bandwidth of the PDPFTS were explored and a technique was developed for reliable phase correction. The results show that the PDPFTS works as predicted, and allows one to recover a broadband spectrum at high resolution.","abstract_html":"Recent advances in superconducting far-infrared (FIR) bolometer detectors have resulted in increases to their sensitivity of at least two orders of magnitude over broadband detectors flown on previous far-infrared spaceborne astronomy instruments. Such sensitivity means that observations employing a Fourier transform spectrometer (FTS) will require techniques to reduce the spectral bandwidth of a detector to limit the photon noise. The proposed SPICA SAFARI instrument employs grating spectrometers to post-disperse the light that has been modulated by a polarizing FTS onto a detector array: a post-dispersed polarizing FTS (PDPFTS). This thesis presents the development of a FIR PDPFTS consisting of a FTS and grating spectrometer. The challenges of phase correction given the narrow bandwidth of the PDPFTS were explored and a technique was developed for reliable phase correction. The results show that the PDPFTS works as predicted, and allows one to recover a broadband spectrum at high resolution.","abstract_has_math":false,"creators":["Huber, Anthony Irving","University of Lethbridge. Faculty of Arts and Science"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2021,"date_issued":"2021","date_published":"2021","updated_at":"2026-07-27T20:02:05Z","subjects":["optics","astronomy","far-infrared","Fourier transform spectrometer","grating spectrometer","phase correction","Fourier transform infrared spectroscopy","Optical spectrometers","Spectrum analysis -- Instruments","Astronomical spectroscopy -- Instruments -- Design and construction","Low temperature engineering","Dissertations, Academic"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["hdl:10133/6068"],"render_values":[{"text":"hdl:10133/6068","href":null,"code":true}]}]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2021"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["optics","astronomy","far-infrared","Fourier transform spectrometer","grating spectrometer","phase correction","Fourier transform infrared spectroscopy","Optical spectrometers","Spectrum analysis -- Instruments","Astronomical spectroscopy -- Instruments -- Design and construction","Low temperature engineering","Dissertations, Academic"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["hdl:10133/6068"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.other","label":"Dc Description Other","values":["Recent advances in superconducting far-infrared (FIR) bolometer detectors have resulted in increases to their sensitivity of at least two orders of magnitude over broadband detectors flown on previous far-infrared spaceborne astronomy instruments. Such sensitivity means that observations employing a Fourier transform spectrometer (FTS) will require techniques to reduce the spectral bandwidth of a detector to limit the photon noise. The proposed SPICA SAFARI instrument employs grating spectrometers to post-disperse the light that has been modulated by a polarizing FTS onto a detector array: a post-dispersed polarizing FTS (PDPFTS). This thesis presents the development of a FIR PDPFTS consisting of a FTS and grating spectrometer. The challenges of phase correction given the narrow bandwidth of the PDPFTS were explored and a technique was developed for reliable phase correction. The results show that the PDPFTS works as predicted, and allows one to recover a broadband spectrum at high resolution."]},{"key":"dc:title","label":"Title","values":["Exploring the challenges of a far-infrared post-dispersed polarising Fourier transform spectrometer"]}]}],"canonical_facts":{"dc:date.issued":["2021"],"dc:description.other":["Recent advances in superconducting far-infrared (FIR) bolometer detectors have resulted in increases to their sensitivity of at least two orders of magnitude over broadband detectors flown on previous far-infrared spaceborne astronomy instruments. Such sensitivity means that observations employing a Fourier transform spectrometer (FTS) will require techniques to reduce the spectral bandwidth of a detector to limit the photon noise. The proposed SPICA SAFARI instrument employs grating spectrometers to post-disperse the light that has been modulated by a polarizing FTS onto a detector array: a post-dispersed polarizing FTS (PDPFTS). This thesis presents the development of a FIR PDPFTS consisting of a FTS and grating spectrometer. The challenges of phase correction given the narrow bandwidth of the PDPFTS were explored and a technique was developed for reliable phase correction. The results show that the PDPFTS works as predicted, and allows one to recover a broadband spectrum at high resolution."],"dc:identifier":["hdl:10133/6068"],"dc:subject":["optics","astronomy","far-infrared","Fourier transform spectrometer","grating spectrometer","phase correction","Fourier transform infrared spectroscopy","Optical spectrometers","Spectrum analysis -- Instruments","Astronomical spectroscopy -- Instruments -- Design and construction","Low temperature engineering","Dissertations, Academic"],"dc:title":["Exploring the challenges of a far-infrared post-dispersed polarising Fourier transform spectrometer"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T20:02:05Z"}