{"id":{"repo_id":"rice","oai_identifier":"oai:repository.rice.edu:1911/104544"},"canonical_url":"https://search.dev.ndltd.org/etd/rice/oai:repository.rice.edu:1911/104544","repository":{"repo_id":"rice","name":"Rice University","base_url":"https://repository.rice.edu/server/oai/request"},"display":{"title":"The effect of gain saturation on actively mode-locked laser pulses","abstract":"The goal of this thesis is to take into account the gain saturation that occurs within pulse duration for actively node-locked lasers and to discuss its effects on the generated pulses. The population inversion, obtained analytically using a perturbation scheme, has been found to vary considerably within pulse envelope. An assumingly Gaussian pulse has been followed along its round-trip in the laser cavity through the active medium and the modulator, and by incorporating the time-dependent gain for the first time in the analysis, self-consistency relations have been found. The resulting pulse characteristics* based on typical Nd:YAG laser parameters show a strong dependence of the output pulsewidths on the pump intensity. as well as of the interpulse spacing on the length of the active medium. The population inversion droped by two orders of magnitude within the duration of the incoming pulse and the extent of the depletion was increasing for increasing pump intensities. By varying the input field from 1 up to 1.5x1 V/m the pulsewidth was found to vary from 1.4 to 2.1 psec while the interpulse spacing jittered within 1.7 psec for variations of the length of the active medium from 1 cm to 5 cm.","abstract_html":"The goal of this thesis is to take into account the gain saturation that occurs within pulse duration for actively node-locked lasers and to discuss its effects on the generated pulses. The population inversion, obtained analytically using a perturbation scheme, has been found to vary considerably within pulse envelope. An assumingly Gaussian pulse has been followed along its round-trip in the laser cavity through the active medium and the modulator, and by incorporating the time-dependent gain for the first time in the analysis, self-consistency relations have been found. The resulting pulse characteristics* based on typical Nd:YAG laser parameters show a strong dependence of the output pulsewidths on the pump intensity. as well as of the interpulse spacing on the length of the active medium. The population inversion droped by two orders of magnitude within the duration of the incoming pulse and the extent of the depletion was increasing for increasing pump intensities. By varying the input field from 1 up to 1.5x1 V/m the pulsewidth was found to vary from 1.4 to 2.1 psec while the interpulse spacing jittered within 1.7 psec for variations of the length of the active medium from 1 cm to 5 cm.","abstract_has_math":false,"creators":["Lekkas, Panayotis C."],"institution":"Rice University","degree_name":"Master of Science","degree_level":"Masters","degree_discipline":"Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["Kim, Dae M."],"committee_chairs":[],"committee_members":["Rabson, Thomas A.","Wilson, William L."],"year":1983,"date_issued":"1983","date_published":"1983","updated_at":"2026-07-24T04:10:15Z","subjects":[],"languages":["eng"],"rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1911/104544","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Kim, Dae M."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Rabson, Thomas A.","Wilson, William L."]},{"key":"dc:creator","label":"Author","values":["Lekkas, Panayotis C."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-12-18T21:25:12Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2018-12-18T21:25:12Z"]},{"key":"dc:date.issued","label":"Date","values":["1983"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Rice University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1911/104544"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The goal of this thesis is to take into account the gain saturation that occurs within pulse duration for actively node-locked lasers and to discuss its effects on the generated pulses. The population inversion, obtained analytically using a perturbation scheme, has been found to vary considerably within pulse envelope. An assumingly Gaussian pulse has been followed along its round-trip in the laser cavity through the active medium and the modulator, and by incorporating the time-dependent gain for the first time in the analysis, self-consistency relations have been found. The resulting pulse characteristics* based on typical Nd:YAG laser parameters show a strong dependence of the output pulsewidths on the pump intensity. as well as of the interpulse spacing on the length of the active medium. The population inversion droped by two orders of magnitude within the duration of the incoming pulse and the extent of the depletion was increasing for increasing pump intensities. By varying the input field from 1 up to 1.5x1 V/m the pulsewidth was found to vary from 1.4 to 2.1 psec while the interpulse spacing jittered within 1.7 psec for variations of the length of the active medium from 1 cm to 5 cm."]},{"key":"dc:title","label":"Title","values":["The effect of gain saturation on actively mode-locked laser pulses"]}]}],"canonical_facts":{"dc:contributor.advisor":["Kim, Dae M."],"dc:contributor.committeemember":["Rabson, Thomas A.","Wilson, William L."],"dc:creator":["Lekkas, Panayotis C."],"dc:date.accessioned":["2018-12-18T21:25:12Z"],"dc:date.available":["2018-12-18T21:25:12Z"],"dc:date.issued":["1983"],"dc:description.abstract":["The goal of this thesis is to take into account the gain saturation that occurs within pulse duration for actively node-locked lasers and to discuss its effects on the generated pulses. The population inversion, obtained analytically using a perturbation scheme, has been found to vary considerably within pulse envelope. An assumingly Gaussian pulse has been followed along its round-trip in the laser cavity through the active medium and the modulator, and by incorporating the time-dependent gain for the first time in the analysis, self-consistency relations have been found. The resulting pulse characteristics* based on typical Nd:YAG laser parameters show a strong dependence of the output pulsewidths on the pump intensity. as well as of the interpulse spacing on the length of the active medium. The population inversion droped by two orders of magnitude within the duration of the incoming pulse and the extent of the depletion was increasing for increasing pump intensities. By varying the input field from 1 up to 1.5x1 V/m the pulsewidth was found to vary from 1.4 to 2.1 psec while the interpulse spacing jittered within 1.7 psec for variations of the length of the active medium from 1 cm to 5 cm."],"dc:identifier.uri":["https://hdl.handle.net/1911/104544"],"dc:language.iso":["eng"],"dc:rights":["Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder."],"dc:title":["The effect of gain saturation on actively mode-locked laser pulses"],"dc:type":["Thesis"],"thesis:degree_discipline":["Engineering"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Rice University"]},"updated_at":"2026-07-24T04:10:15Z"}