{"id":364932,"date":"2024-04-30T15:31:20","date_gmt":"2024-04-30T15:31:20","guid":{"rendered":"\/forum\/forums\/topic\/problem-in-waveguide-propagation-loss-calculation\/"},"modified":"2024-04-30T15:31:20","modified_gmt":"2024-04-30T15:31:20","slug":"problem-in-waveguide-propagation-loss-calculation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/problem-in-waveguide-propagation-loss-calculation\/","title":{"rendered":"Problem in Waveguide propagation loss calculation"},"content":{"rendered":"<p>I need to calculate propagation loss (at 1310 nm) in&nbsp; waveguide of dimension 300 nm height and 700 nm width with core index 1.952 and cladding using top and bottom oxide of silicon dioxide palik. See attached figure for the detail. I am using PML boundary condition in all direction. The apparently after running the FDE simulation the propagation loss COMES TO BE VERY HIGH of 45 d<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/30-04-2024-1714491072-Presentation2.jpg\" alt=\"\">b per cm and as I am increasing the area of simulation region the propagation loss is going to very high value of more than 130 db per cm. Should the simulation area affect the propagation loss value.? Also at sufficiently large area of simulation region the propagation loss is dropping to near zero value, which is again unrealisticaly low value. Please help me sort out the problem. Thank you very much!<\/p>\n","protected":false},"template":"","class_list":["post-364932","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["258479","2592"],"_bbp_author_ip":["23.196.2.143"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["208"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["364932"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","258479"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["365382"],"_bbp_last_active_id":["365382"],"_bbp_last_active_time":["2024-05-03 10:51:05"]},"test":"dubeyihp-microelectronics-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/364932","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\/364932\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=364932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}