{"id":390482,"date":"2024-10-19T06:52:48","date_gmt":"2024-10-19T06:52:48","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/designing-a-single-mode-fiber\/"},"modified":"2024-10-19T06:52:48","modified_gmt":"2024-10-19T06:52:48","slug":"designing-a-single-mode-fiber","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/designing-a-single-mode-fiber\/","title":{"rendered":"Designing a single mode fiber"},"content":{"rendered":"<p>&lt;p&gt;I designed a Lumerical Mode Solution rectangular Si waveguide with Si substrate and adjusted the width and thickness in order to achieve one TE mode. I want to now design a single mode fiber where the indices of the fiber core and cladding are 1.6 and 1.4. However I am still somewhat new to Lumerical and have never designed a fiber on it. I can use some advice on if I should take my existing design and tweak the geometry to make my fiber design while keeping the single mode, or should I just do a brand new design for the single mode fiber? In order to design the fiber, am I just creating two cylinders or circles with the core in between the cladding? Any advice is greatly appreciated. Thank you!&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/19-10-2024-1729320637-Forum1.PNG\" alt=\"\" width=\"807\" height=\"369\" \/>&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/19-10-2024-1729320699-Forum2.PNG\" alt=\"\" width=\"799\" height=\"362\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-390482","topic","type-topic","status-publish","hentry","topic-tag-waveguide-2","topic-tag-fiber","topic-tag-LumericalMode-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I designed a Lumerical Mode Solution rectangular Si waveguide with Si substrate and adjusted the width and thickness in order to achieve one TE mode. I want to now design a single mode fiber where the indices of the fiber core and cladding are 1.6 and 1.4. However I am still somewhat new to Lumerical\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/designing-a-single-mode-fiber\/\" \/>\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=\"Designing a single mode fiber | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I designed a Lumerical Mode Solution rectangular Si waveguide with Si substrate and adjusted the width and thickness in order to achieve one TE mode. 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