{"id":369996,"date":"2024-06-05T21:12:05","date_gmt":"2024-06-05T21:12:05","guid":{"rendered":"\/forum\/forums\/reply\/369996\/"},"modified":"2024-06-05T21:12:05","modified_gmt":"2024-06-05T21:12:05","slug":"369996","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/369996\/","title":{"rendered":"Reply To: How to simulate a big Si3N4 ring resonator in varFDTD or FDTD"},"content":{"rendered":"<p>&lt;p&gt;Hi Minming,&lt;\/p&gt;&lt;p&gt;It is hard to predict the reasons without actually having looked at the simulation file. Usually to confirm the validity of results, we recommend customers to perform&nbsp;<a href=\"https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360034915833-Convergence-testing-process-for-FDTD-simulations\">&lt;span style=&#8221;text-decoration: underline;&#8221;&gt;<strong>convergence testing<\/strong>&lt;\/span&gt;<\/a> on different parameters. One of the main parameters, I would say is the mesh accuracy. Have you tried running the simulation for different mesh accuracies and compared the results? Is the screenshot that of transmission? I would recommend reducing the auto shutoff level of the varFDTD simulation (and run the simulation longer), looks like the <a href=\"https:\/\/optics.ansys.com\/hc\/en-us\/articles\/12614264530323-Transmission-Results-Greater-Than-One\">transmission is going above 1<\/a>.&nbsp;&lt;\/p&gt;&lt;p&gt;Regards,&lt;br&gt;Amrita&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-369996","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi Minming,It is hard to predict the reasons without actually having looked at the simulation file. Usually to confirm the validity of results, we recommend customers to perform convergence testing on different parameters. One of the main parameters, I would say is the mesh accuracy. Have you tried running the simulation for different mesh\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/369996\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: How to simulate a big Si3N4 ring resonator in varFDTD or FDTD | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi Minming,It is hard to predict the reasons without actually having looked at the simulation file. Usually to confirm the validity of results, we recommend customers to perform convergence testing on different parameters. One of the main parameters, I would say is the mesh accuracy. 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Usually to confirm the validity of results, we recommend customers to perform convergence testing on different parameters. One of the main parameters, I would say is the mesh accuracy. 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Usually to confirm the validity of results, we recommend customers to perform convergence testing on different parameters. One of the main parameters, I would say is the mesh accuracy. 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Usually to confirm the validity of results, we recommend customers to perform convergence testing on different parameters. One of the main parameters, I would say is the mesh accuracy. Have you tried running the simulation for different mesh","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/369996\/","article:published_time":"2024-06-05T21:12:05+00:00","article:modified_time":"2024-06-05T21:12:05+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: How to simulate a big Si3N4 ring resonator in varFDTD or FDTD | Ansys Learning Forum","twitter:description":"Hi Minming,It is hard to predict the reasons without actually having looked at the simulation file. Usually to confirm the validity of results, we recommend customers to perform convergence testing on different parameters. One of the main parameters, I would say is the mesh accuracy. 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