{"id":2578,"date":"2025-09-05T18:57:29","date_gmt":"2025-09-05T18:57:29","guid":{"rendered":"https:\/\/lplnew.creol.ucf.edu\/?page_id=2578"},"modified":"2025-09-05T19:39:15","modified_gmt":"2025-09-05T19:39:15","slug":"thermal-lensing","status":"publish","type":"page","link":"https:\/\/creol.ucf.edu\/lpl\/facilities\/thermal-lensing\/","title":{"rendered":"Thermal Lensing Characterization Facility"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2578\" class=\"elementor elementor-2578\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0d51354 e-con-full e-flex e-con e-parent\" data-id=\"0d51354\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-3750a4e e-con-full e-flex e-con e-child\" data-id=\"3750a4e\" data-element_type=\"container\" data-e-type=\"container\" 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id=\"menu-1-cd5f40a\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-home menu-item-2031\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/\" class=\"elementor-item\">Home<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2102\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/dr-richardson\/\" class=\"elementor-item\">Dr. Richardson<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-1266\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/people\/\" class=\"elementor-item\">People<\/a>\n<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5007\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/people\/\" class=\"elementor-sub-item\">Main Faculty<\/a><\/li>\n<\/ul>\n<\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-1265\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/research\/\" class=\"elementor-item\">Research<\/a>\n<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5008\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/atmospheric-studies\/\" class=\"elementor-sub-item\">Atmospheric Studies<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5010\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/high-intensity-ultrashort\/\" class=\"elementor-sub-item\">High Intensity Ultrashort Lasers<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5009\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/high-power-cw-laser\/\" class=\"elementor-sub-item\">High Power CW laser<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5011\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/laser-int-studies\/\" class=\"elementor-sub-item\">Laser Interaction Studies<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5012\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/optical-damage-studies\/\" class=\"elementor-sub-item\">Optical Damage Studies<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5013\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/high-power-laser-propagation-atmosphere\/\" class=\"elementor-sub-item\">High Power Laser Propagation Atmosphere<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5014\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/lwir-laser-propagation-and-interaction\/\" class=\"elementor-sub-item\">LWIR Laser Propagation and Interaction<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5015\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/optical-filamentation\/\" class=\"elementor-sub-item\">Optical Filamentation<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5016\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/high-power-pulsed-fiber-laser-development-for-directed-energy-and-laser-fusion\/\" class=\"elementor-sub-item\">High Power Pulsed Fiber Laser Development<\/a><\/li>\n<\/ul>\n<\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-2565\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/\" class=\"elementor-item\">Facilities<\/a>\n<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5017\"><a href=\"https:\/\/www.research.ucf.edu\/tistef-laser-range\/\" class=\"elementor-sub-item\">TISTEF<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5018\"><a href=\"http:\/\/lpl\/facilities\/#co2\" class=\"elementor-sub-item elementor-item-anchor\">CO2<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5019\"><a href=\"http:\/\/lpl\/facilities\/#hpld\" class=\"elementor-sub-item elementor-item-anchor\">High Power Laser Development<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5020\"><a href=\"http:\/\/lpl\/facilities\/#damage\" class=\"elementor-sub-item elementor-item-anchor\">Damage Testing<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5021\"><a href=\"http:\/\/lpl\/facilities\/#helos\" class=\"elementor-sub-item elementor-item-anchor\">HELOS<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5022\"><a href=\"http:\/\/lpl\/facilities\/#heldf\" class=\"elementor-sub-item elementor-item-anchor\">HEL-DF<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5023\"><a href=\"http:\/\/lpl\/facilities\/#muhelf\" class=\"elementor-sub-item elementor-item-anchor\">MU-HELF<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5024\"><a href=\"http:\/\/lpl\/facilities\/#mtfl\" class=\"elementor-sub-item elementor-item-anchor\">MTFL<\/a><\/li>\n<\/ul>\n<\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2852\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/programs\/\" class=\"elementor-item\">Programs<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-4302\"><a href=\"https:\/\/creol.ucf.edu\/\" class=\"elementor-item\">Collaborators<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-1292\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/publications\/\" class=\"elementor-item\">Publications<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2851\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/courses\/\" class=\"elementor-item\">Courses<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t<div class=\"elementor-menu-toggle\" role=\"button\" tabindex=\"0\" aria-label=\"Menu Toggle\" aria-expanded=\"false\">\n\t\t\t<svg aria-hidden=\"true\" role=\"presentation\" class=\"elementor-menu-toggle__icon--open e-font-icon-svg e-eicon-menu-bar\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M104 333H896C929 333 958 304 958 271S929 208 896 208H104C71 208 42 237 42 271S71 333 104 333ZM104 583H896C929 583 958 554 958 521S929 458 896 458H104C71 458 42 487 42 521S71 583 104 583ZM104 833H896C929 833 958 804 958 771S929 708 896 708H104C71 708 42 737 42 771S71 833 104 833Z\"><\/path><\/svg><svg aria-hidden=\"true\" role=\"presentation\" class=\"elementor-menu-toggle__icon--close e-font-icon-svg e-eicon-close\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M742 167L500 408 258 167C246 154 233 150 217 150 196 150 179 158 167 167 154 179 150 196 150 212 150 229 154 242 171 254L408 500 167 742C138 771 138 800 167 829 196 858 225 858 254 829L496 587 738 829C750 842 767 846 783 846 800 846 817 842 829 829 842 817 846 804 846 783 846 767 842 750 829 737L588 500 833 258C863 229 863 200 833 171 804 137 775 137 742 167Z\"><\/path><\/svg>\t\t<\/div>\n\t\t\t\t\t<nav class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-cd5f40a\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-home menu-item-2031\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/\" class=\"elementor-item\" tabindex=\"-1\">Home<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2102\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/dr-richardson\/\" class=\"elementor-item\" tabindex=\"-1\">Dr. Richardson<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-1266\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/people\/\" class=\"elementor-item\" tabindex=\"-1\">People<\/a>\n<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5007\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/people\/\" class=\"elementor-sub-item\" tabindex=\"-1\">Main Faculty<\/a><\/li>\n<\/ul>\n<\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-1265\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/research\/\" class=\"elementor-item\" tabindex=\"-1\">Research<\/a>\n<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5008\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/atmospheric-studies\/\" class=\"elementor-sub-item\" tabindex=\"-1\">Atmospheric Studies<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5010\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/high-intensity-ultrashort\/\" class=\"elementor-sub-item\" tabindex=\"-1\">High Intensity Ultrashort Lasers<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5009\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/high-power-cw-laser\/\" class=\"elementor-sub-item\" tabindex=\"-1\">High Power CW laser<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5011\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/laser-int-studies\/\" class=\"elementor-sub-item\" tabindex=\"-1\">Laser Interaction Studies<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5012\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/optical-damage-studies\/\" class=\"elementor-sub-item\" tabindex=\"-1\">Optical Damage Studies<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5013\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/high-power-laser-propagation-atmosphere\/\" class=\"elementor-sub-item\" tabindex=\"-1\">High Power Laser Propagation Atmosphere<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5014\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/lwir-laser-propagation-and-interaction\/\" class=\"elementor-sub-item\" tabindex=\"-1\">LWIR Laser Propagation and Interaction<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5015\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/optical-filamentation\/\" class=\"elementor-sub-item\" tabindex=\"-1\">Optical Filamentation<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-5016\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/high-power-pulsed-fiber-laser-development-for-directed-energy-and-laser-fusion\/\" class=\"elementor-sub-item\" tabindex=\"-1\">High Power Pulsed Fiber Laser Development<\/a><\/li>\n<\/ul>\n<\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-2565\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/\" class=\"elementor-item\" tabindex=\"-1\">Facilities<\/a>\n<ul class=\"sub-menu elementor-nav-menu--dropdown\">\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5017\"><a href=\"https:\/\/www.research.ucf.edu\/tistef-laser-range\/\" class=\"elementor-sub-item\" tabindex=\"-1\">TISTEF<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5018\"><a href=\"http:\/\/lpl\/facilities\/#co2\" class=\"elementor-sub-item elementor-item-anchor\" tabindex=\"-1\">CO2<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5019\"><a href=\"http:\/\/lpl\/facilities\/#hpld\" class=\"elementor-sub-item elementor-item-anchor\" tabindex=\"-1\">High Power Laser Development<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5020\"><a href=\"http:\/\/lpl\/facilities\/#damage\" class=\"elementor-sub-item elementor-item-anchor\" tabindex=\"-1\">Damage Testing<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5021\"><a href=\"http:\/\/lpl\/facilities\/#helos\" class=\"elementor-sub-item elementor-item-anchor\" tabindex=\"-1\">HELOS<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5022\"><a href=\"http:\/\/lpl\/facilities\/#heldf\" class=\"elementor-sub-item elementor-item-anchor\" tabindex=\"-1\">HEL-DF<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5023\"><a href=\"http:\/\/lpl\/facilities\/#muhelf\" class=\"elementor-sub-item elementor-item-anchor\" tabindex=\"-1\">MU-HELF<\/a><\/li>\n\t<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-5024\"><a href=\"http:\/\/lpl\/facilities\/#mtfl\" class=\"elementor-sub-item elementor-item-anchor\" tabindex=\"-1\">MTFL<\/a><\/li>\n<\/ul>\n<\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2852\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/programs\/\" class=\"elementor-item\" tabindex=\"-1\">Programs<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-4302\"><a href=\"https:\/\/creol.ucf.edu\/\" class=\"elementor-item\" tabindex=\"-1\">Collaborators<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-1292\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/publications\/\" class=\"elementor-item\" tabindex=\"-1\">Publications<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2851\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/courses\/\" class=\"elementor-item\" tabindex=\"-1\">Courses<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40343c2 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"40343c2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3746077 elementor-nav-menu__align-center elementor-nav-menu__text-align-center elementor-nav-menu--dropdown-tablet elementor-widget elementor-widget-nav-menu\" data-id=\"3746077\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;layout&quot;:&quot;horizontal&quot;,&quot;submenu_icon&quot;:{&quot;value&quot;:&quot;&lt;svg aria-hidden=\\&quot;true\\&quot; class=\\&quot;e-font-icon-svg e-fas-caret-down\\&quot; viewBox=\\&quot;0 0 320 512\\&quot; xmlns=\\&quot;http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\&quot;&gt;&lt;path d=\\&quot;M31.3 192h257.3c17.8 0 26.7 21.5 14.1 34.1L174.1 354.8c-7.8 7.8-20.5 7.8-28.3 0L17.2 226.1C4.6 213.5 13.5 192 31.3 192z\\&quot;&gt;&lt;\\\/path&gt;&lt;\\\/svg&gt;&quot;,&quot;library&quot;:&quot;fa-solid&quot;}}\" data-widget_type=\"nav-menu.default\">\n\t\t\t\t\t\t\t\t<nav aria-label=\"Menu\" class=\"elementor-nav-menu--main elementor-nav-menu__container elementor-nav-menu--layout-horizontal e--pointer-none\">\n\t\t\t\t<ul id=\"menu-1-3746077\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2653\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/hiceps\/\" class=\"elementor-item\">HERACLES<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2652\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/hifl\/\" class=\"elementor-item\">HIFL<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2651\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/isteffac\/\" class=\"elementor-item\">2um Laser Propagation<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2650\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/imra\/\" class=\"elementor-item\">IMRA Partnership<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2649\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/khz\/\" class=\"elementor-item\">Khz Femtosecond Laser<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2648\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/fiber-processing\/\" class=\"elementor-item\">Fiber Processing<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2647\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/thermal-lensing\/\" class=\"elementor-item\">Thermal Lensing<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<nav class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-3746077\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2653\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/hiceps\/\" class=\"elementor-item\" tabindex=\"-1\">HERACLES<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2652\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/hifl\/\" class=\"elementor-item\" tabindex=\"-1\">HIFL<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2651\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/isteffac\/\" class=\"elementor-item\" tabindex=\"-1\">2um Laser Propagation<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2650\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/imra\/\" class=\"elementor-item\" tabindex=\"-1\">IMRA Partnership<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2649\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/khz\/\" class=\"elementor-item\" tabindex=\"-1\">Khz Femtosecond Laser<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2648\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/fiber-processing\/\" class=\"elementor-item\" tabindex=\"-1\">Fiber Processing<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-2647\"><a href=\"https:\/\/creol.ucf.edu\/lpl\/facilities\/thermal-lensing\/\" class=\"elementor-item\" tabindex=\"-1\">Thermal Lensing<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6a33723 e-flex e-con-boxed e-con e-parent\" data-id=\"6a33723\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-70a5c6b e-con-full e-flex e-con e-child\" data-id=\"70a5c6b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-90efeb5 elementor-widget elementor-widget-heading\" data-id=\"90efeb5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Thermal Lensing Characterization Facility<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d7ed1c elementor-widget elementor-widget-gallery\" data-id=\"7d7ed1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;lazyload&quot;:&quot;yes&quot;,&quot;gallery_layout&quot;:&quot;grid&quot;,&quot;columns&quot;:4,&quot;columns_tablet&quot;:2,&quot;columns_mobile&quot;:1,&quot;gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;link_to&quot;:&quot;file&quot;,&quot;aspect_ratio&quot;:&quot;3:2&quot;,&quot;overlay_background&quot;:&quot;yes&quot;,&quot;content_hover_animation&quot;:&quot;fade-in&quot;}\" data-widget_type=\"gallery.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-gallery__container\">\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/creol.ucf.edu\/lpl\/wp-content\/uploads\/sites\/89\/2025\/09\/thermallens_big.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"7d7ed1c\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjYzOSwidXJsIjoiaHR0cHM6XC9cL2NyZW9sLnVjZi5lZHVcL2xwbFwvd3AtY29udGVudFwvdXBsb2Fkc1wvc2l0ZXNcLzg5XC8yMDI1XC8wOVwvdGhlcm1hbGxlbnNfYmlnLmpwZyIsInNsaWRlc2hvdyI6IjdkN2VkMWMifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/creol.ucf.edu\/lpl\/wp-content\/uploads\/sites\/89\/2025\/09\/thermallens_big-300x195.jpg\" data-width=\"300\" data-height=\"195\" aria-label=\"\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/creol.ucf.edu\/lpl\/wp-content\/uploads\/sites\/89\/2025\/09\/thermallens_two_big.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"7d7ed1c\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjY0MCwidXJsIjoiaHR0cHM6XC9cL2NyZW9sLnVjZi5lZHVcL2xwbFwvd3AtY29udGVudFwvdXBsb2Fkc1wvc2l0ZXNcLzg5XC8yMDI1XC8wOVwvdGhlcm1hbGxlbnNfdHdvX2JpZy5qcGciLCJzbGlkZXNob3ciOiI3ZDdlZDFjIn0%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/creol.ucf.edu\/lpl\/wp-content\/uploads\/sites\/89\/2025\/09\/thermallens_two_big-300x220.jpg\" data-width=\"300\" data-height=\"220\" aria-label=\"\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f89c302 e-con-full e-flex e-con e-child\" data-id=\"f89c302\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2798a34 elementor-widget elementor-widget-text-editor\" data-id=\"2798a34\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"maincontent\"><div class=\"maincontent\"><p>Thermally induced distortion is a primary limiting factor on average power scaling in laser systems, as even passive components suffer from laser induced heating at sufficiently high average powers. The laser induced thermal distribution will be a convolution of the laser beam distribution, the substrate absorption at the laser wavelength, and the thermal conductivity of the substrate. Thus, particularly for lasers with Gaussian-like beam profiles, a ?thermal lens? will form in which the focal length is proportionate the amount of laser heating.<\/p><p>One pervasive issue, associated with our research and development of thulium fiber lasers, is the significant optical absorption of OH in the 2 um wavelength regime. Relative to high power ytterbium fiber lasers at 1 um, this means more absorption due to OH contamination is the fiber itself, beam delivery optics such as lens and mirrors, and even water vapor in the air. While the thermal lensing does not cause beam distortion within the fiber, due to the dominance of the waveguide, it is significant for beam delivery optics.<\/p><p>To characterize the significance of such effects in a variety of materials subject to high power 2 um light, we have constructed the Thermal Lens Characterization Facility. It utilizes a homemade Tm:fiber laser oscillator, producing up to 60 W average power with M2 &lt; 1.2, with a 4 mm collimated beam diameter on the sample. The thermally induced wavefront distortion of an off-axis probe beam is measured using an Imagine Optic HASO 3 FIRST Shack-Hartmann wavefront sensor. Our measurements demonstrate &gt;1? wavefront distortion in BK7 for an irradiance of ~1.5 kW\/cm2, and ~4X larger wavefront distortion in BK7 than fused silica due to larger optical absorption and larger thermal expansion coefficient.<\/p><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"Thermal Lensing Characterization Facility Thermally induced distortion is a primary limiting factor on average power scaling in laser systems, as even passive components suffer from laser induced heating at sufficiently high average powers. The laser induced thermal distribution will be a convolution of the laser beam distribution, the substrate absorption at the laser wavelength, and&hellip;","protected":false},"author":1,"featured_media":0,"parent":2550,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-2578","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/pages\/2578","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/comments?post=2578"}],"version-history":[{"count":7,"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/pages\/2578\/revisions"}],"predecessor-version":[{"id":2677,"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/pages\/2578\/revisions\/2677"}],"up":[{"embeddable":true,"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/pages\/2550"}],"wp:attachment":[{"href":"https:\/\/creol.ucf.edu\/lpl\/wp-json\/wp\/v2\/media?parent=2578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}