{"id":240557,"date":"2022-11-12T13:20:59","date_gmt":"2022-11-12T13:20:59","guid":{"rendered":"\/forum\/?post_type=topic&#038;p=240557"},"modified":"2022-11-12T13:20:59","modified_gmt":"2022-11-12T13:20:59","slug":"coupling-coefficient-k-in-varfdtd-simulations","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/coupling-coefficient-k-in-varfdtd-simulations\/","title":{"rendered":"Coupling Coefficient k in VarFDTD simulations"},"content":{"rendered":"<p>Given an optical ring resonator with an all pass filter configuration (shown below), how do you calculate the coupling coefficient k in Lumerical VarFDTD simulations?<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"display: block;margin-left: auto;margin-right: auto\" title=\"All Pass Filter Optical Ring Resonator\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/11\/12-11-2022-1668254851-F2.png\" alt=\"\" width=\"486\" height=\"294\"><\/p>\n<p>&nbsp;<\/p>\n<p>In Lumerical tutorials, I followed the instructions that find the s-parameters. The s-parameters were descirbed as complex transmission coefficients. Is it correct to say that the s-parameters can derive the coupling coefficient k of the optical ring resonator?<\/p>\n","protected":false},"template":"","class_list":["post-240557","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["96.7.74.191"],"_bbp_subscription":["267481","2592"],"_btv_view_count":["2869"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["240557"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","267481"],"_bbp_voice_count":["2"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["241173"],"_bbp_last_active_id":["241173"],"_bbp_last_active_time":["2022-11-17 14:39:27"]},"test":"ajdumalusateneo-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/240557","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\/240557\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=240557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}