{"id":304163,"date":"2023-08-30T15:50:01","date_gmt":"2023-08-30T15:50:01","guid":{"rendered":"\/forum\/forums\/topic\/bent-waveguide-problem-in-mode\/"},"modified":"2023-08-30T15:50:01","modified_gmt":"2023-08-30T15:50:01","slug":"bent-waveguide-problem-in-mode","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/bent-waveguide-problem-in-mode\/","title":{"rendered":"bent waveguide problem in MODE"},"content":{"rendered":"<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">I am designing a ring resonator and using MODE to simulate the bending loss and neff. However, I find the result is very inconsistent depending on where the origin is set.&nbsp;<\/p>\n<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">&nbsp;<\/p>\n<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">In the original simulation of the lumerical example, the simulation center is at x=-0.1um, and a bending radius r=1.5um and here&#8217;s the result<\/p>\n<p style=\"margin: 0in\"><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/30-08-2023-1693410401-blobid0.png\" width=\"295\" height=\"198\"><\/p>\n<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">&nbsp;<\/p>\n<p style=\"margin: 0in\"><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/30-08-2023-1693410401-blobid1.png\" width=\"550\" height=\"44\"><\/p>\n<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">&nbsp;<\/p>\n<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">Then if I set the FDE origin to be x=0 and bending radius r=1.6um, The result is totally different.<\/p>\n<p style=\"margin: 0in\"><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/30-08-2023-1693410401-blobid2.png\" width=\"293\" height=\"211\"><\/p>\n<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">&nbsp;<\/p>\n<p style=\"margin: 0in\"><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/30-08-2023-1693410401-blobid3.png\" width=\"567\" height=\"47\"><\/p>\n<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">&nbsp;<\/p>\n<p style=\"margin: 0in;font-family: Arial;font-size: 11.0pt\">This kind of inconsistency continues with user specified bend location. This makes it difficult to simulate complex structures. Is there a reason behind this inconsistency?<\/p>\n","protected":false},"template":"","class_list":["post-304163","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["292498","2592"],"_bbp_author_ip":["23.206.193.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["691"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["304163"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","292498"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["304382"],"_bbp_last_active_id":["304382"],"_bbp_last_active_time":["2023-08-31 13:52:43"]},"test":"wuqmi-ubc-ca"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/304163","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\/304163\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=304163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}