{"id":367997,"date":"2024-05-22T07:43:38","date_gmt":"2024-05-22T07:43:38","guid":{"rendered":"\/forum\/forums\/reply\/367997\/"},"modified":"2024-05-22T07:43:38","modified_gmt":"2024-05-22T07:43:38","slug":"367997","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/367997\/","title":{"rendered":"Reply To: Loss vs. waveguide bend radius in Lumerical FEEM"},"content":{"rendered":"<p>&lt;p&gt;In relation to this, the mode field I am interested in looks like this (for 15 mm bend radius). The entire field seems to have shifted to the slab.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/22-05-2024-1716362458-2.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;Also, I have followed the instruction in this post (\/forum\/forums\/topic\/is-it-possible-to-simulate-bent-waveguide-using-eme\/) to check the bending loss using EME as well. I found that the loss for the same bend radius keeping varying with change in span of simulation region.&nbsp;&lt;\/p&gt;&lt;p&gt;The bending loss for 15 mm bent radius, as obtained from FEEM was 50 dB\/cm, whereas EME gives different values as shown (for same settings, but different simulation region span).&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/22-05-2024-1716363594-1.PNG\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;Here, 44.7 dB\/cm is the value obtained, which has been reduced to 7.8 dB\/cm for a larger simulation span.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/22-05-2024-1716363693-2.PNG\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;How much span should I keep while performing EME simulation? Please suggest what can be done.&lt;\/p&gt;&lt;p&gt;Thank you.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-367997","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/367997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/367997\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=367997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}