{"id":159869,"date":"2021-06-26T02:37:14","date_gmt":"2021-06-26T02:37:14","guid":{"rendered":"\/forum\/forums\/topic\/how-to-accurately-measure-propagation-loss-for-a-wave-guide-with-surface-roughness\/"},"modified":"2021-06-29T11:10:48","modified_gmt":"2021-06-29T11:10:48","slug":"how-to-accurately-measure-propagation-loss-for-a-wave-guide-with-surface-roughness","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-accurately-measure-propagation-loss-for-a-wave-guide-with-surface-roughness\/","title":{"rendered":"How to accurately measure propagation loss for a wave-guide with surface roughness?"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello,<\/p>\n<p>I have applied the surface roughness suggested by Lumerical in the link given below. I want to measure the propagation loss in the waveguide due to surface roughness for a wavelength of 1.55um.[sigma = 2nm, correlation length (Lc) = 50nm.]<\/p>\n<p><a href=\"https:\/\/support.lumerical.com\/hc\/en-us\/articles\/360034382374-Tips-for-adding-surface-roughness-to-structures\" rel=\"nofollow\">https:\/\/support.lumerical.com\/hc\/en-us\/articles\/360034382374-Tips-for-adding-surface-roughness-to-structures<\/a><\/p>\n<p> I believe that I am using sufficient meshing for the simulation. I have placed 5 DFT monitors at uniform intervals to measure the power in the core of the waveguide passing through them.<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/194\/XZPMJMGRBBAW.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/194\/XZPMJMGRBBAW.png\" alt=\"image.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-159869","topic","type-topic","status-closed","hentry","topic-tag-dielectric-waveguide","topic-tag-fdtd","topic-tag-lumerical","topic-tag-surface-roughness-1","topic-tag-wave-propagation"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_view_count":["13303"],"_bbp_likes_count":["0","0"],"_bbp_forum_subforum_count":["0"],"_btv_view_count":["2011"],"_bbp_subscription":["235156"],"_edit_lock":["1659342749:76739"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["159869"],"_bbp_forum_id":["27833"],"_bbp_engagement":["707","191169"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["183535"],"_bbp_last_active_id":["183535"],"_bbp_last_active_time":["2021-06-29 11:10:48"]},"test":"anish22300gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/159869","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/159869\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=159869"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}