{"id":{"repo_id":"soton","oai_identifier":"oai:eprints.soton.ac.uk:42432"},"canonical_url":"https://search.dev.ndltd.org/etd/soton/oai:eprints.soton.ac.uk:42432","repository":{"repo_id":"soton","name":"University of Southampton","base_url":"https://eprints.soton.ac.uk/cgi/oai2"},"display":{"title":"An investigation into using optical amplifiers for enhancing Brillouin based optical time domain reflectometry","abstract":"Distributed fibre sensors have been successfully demonstrated and used in various industries for performing continuous measurements of the physical parameters such as temperature and strain. However, the measurement range and the performance of such sensors are limited by the intrinsic attenuation of the signal in the sensing fibre. This thesis investigates using optical amplification within the sensing fibre to enhance the range and the performance of the distributed Brillouin based sensors. To extend the range beyond this, remote amplification was also investigated using CW Raman amplification in which a Raman pump is injected at the midpoint of a 100km sensing fibre and a remotely pumped Erbium doped fibre amplifier is also situated at the midpoint. The performance achieved using each technique was measured and the relative advantages of each configuration were identified and discussed.","abstract_html":"Distributed fibre sensors have been successfully demonstrated and used in various industries for performing continuous measurements of the physical parameters such as temperature and strain. However, the measurement range and the performance of such sensors are limited by the intrinsic attenuation of the signal in the sensing fibre. This thesis investigates using optical amplification within the sensing fibre to enhance the range and the performance of the distributed Brillouin based sensors. To extend the range beyond this, remote amplification was also investigated using CW Raman amplification in which a Raman pump is injected at the midpoint of a 100km sensing fibre and a remotely pumped Erbium doped fibre amplifier is also situated at the midpoint. The performance achieved using each technique was measured and the relative advantages of each configuration were identified and discussed.","abstract_has_math":false,"creators":["Cho, Yuh Tat"],"institution":"University of Southampton","degree_name":"Ph.D.","degree_level":"doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2004,"date_issued":"2004","date_published":"2004","updated_at":"2026-07-24T04:35:46Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Cho, Yuh Tat"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2004"]},{"key":"dc:date.issued","label":"Date","values":["2004"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Optoelectronics Research Centre (pre 2011 reorg)","Optoelectronics Research Centre"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Southampton"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://eprints.soton.ac.uk/42432/"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["Ph.D."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://eprints.soton.ac.uk/42432/1/Cho_2004_thesis_3278.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Distributed fibre sensors have been successfully demonstrated and used in various industries for performing continuous measurements of the physical parameters such as temperature and strain. However, the measurement range and the performance of such sensors are limited by the intrinsic attenuation of the signal in the sensing fibre. This thesis investigates using optical amplification within the sensing fibre to enhance the range and the performance of the distributed Brillouin based sensors. To extend the range beyond this, remote amplification was also investigated using CW Raman amplification in which a Raman pump is injected at the midpoint of a 100km sensing fibre and a remotely pumped Erbium doped fibre amplifier is also situated at the midpoint. The performance achieved using each technique was measured and the relative advantages of each configuration were identified and discussed."]},{"key":"dc:format","label":"Dc Format","values":["text"]},{"key":"dc:title","label":"Title","values":["An investigation into using optical amplifiers for enhancing Brillouin based optical time domain reflectometry"]}]}],"canonical_facts":{"dc:creator":["Cho, Yuh Tat"],"dc:date":["2004"],"dc:date.issued":["2004"],"dc:description.abstract":["Distributed fibre sensors have been successfully demonstrated and used in various industries for performing continuous measurements of the physical parameters such as temperature and strain. However, the measurement range and the performance of such sensors are limited by the intrinsic attenuation of the signal in the sensing fibre. This thesis investigates using optical amplification within the sensing fibre to enhance the range and the performance of the distributed Brillouin based sensors. To extend the range beyond this, remote amplification was also investigated using CW Raman amplification in which a Raman pump is injected at the midpoint of a 100km sensing fibre and a remotely pumped Erbium doped fibre amplifier is also situated at the midpoint. The performance achieved using each technique was measured and the relative advantages of each configuration were identified and discussed."],"dc:format":["text"],"dc:identifier.uri":["https://eprints.soton.ac.uk/42432/1/Cho_2004_thesis_3278.pdf"],"dc:publisher.department":["Optoelectronics Research Centre (pre 2011 reorg)","Optoelectronics Research Centre"],"dc:publisher.institution":["University of Southampton"],"dc:relation.isreferencedby":["https://eprints.soton.ac.uk/42432/"],"dc:title":["An investigation into using optical amplifiers for enhancing Brillouin based optical time domain reflectometry"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["doctoral"],"dc:type.qualificationname":["Ph.D."]},"updated_at":"2026-07-24T04:35:46Z"}