{"id":373694,"date":"2024-07-25T21:08:09","date_gmt":"2024-07-25T21:08:09","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/inverse-design-freezing-issue\/"},"modified":"2024-07-25T21:08:09","modified_gmt":"2024-07-25T21:08:09","slug":"inverse-design-freezing-issue","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/inverse-design-freezing-issue\/","title":{"rendered":"Inverse Design Freezing Issue"},"content":{"rendered":"
Hello,<\/div>\n
 <\/div>\n
I am having a problem with running codes using the inverse design method in Lumerical. I want to use this method to optimize an MMI structure (like the Y_branch example, https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360042305274-Inverse-design-of-y-branch) by using 400 iterations. I used 3D FDTD solver to optimizs a structure 10 microns long. Some other parameters are: dx = 1e-09, pgtol = 1e-09, ftol = 1e-09, scaling_factor = 1e9, mesh size_y = 30nm, and mesh size_x = 50nm (changing the mesh size does not affect the problem).<\/div>\n
 <\/div>\n
When I run the code, it gets stuck and freezes after around 30 iterations. It also runs some iterations more than 8 times. Is this a problem with the code or with my system?<\/div>\n
 <\/div>\n
My system information is: cores: 64, Logical processors: 128, Physical memory: 256 GB.<\/div>\n
 <\/div>\n
I would appreciate it if you could help me.<\/div>\n
 <\/div>\n
Thank you,<\/div>\n
Fatemeh<\/div>\n","protected":false},"template":"","class_list":["post-373694","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t