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Frequency dependent refractive index in Comsol 5
Posted Oct 22, 2015, 7:05 a.m. EDT Ray Optics, Wave Optics Version 5.0 1 Reply
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Hi,
I am trying to define a frequency dependent refractive index in Comsol 5.
I have a txt file with the value of the RI for different frequencies and I loaded it in Global/Definition/Function/Interpolation. I then checked the "Frequency dependent refractive index" box in the Geometrical Optics physics and selected a Normal distribution with number of values N=10, mean 4.54e14[Hz] and sigma 1E14[Hz].
When I compute the study (in my geometry there are only a conical light source and a collimating lens) and plot the ray trajectories it's as if the lens isn't there. The light travels through and is not collimated at all. In attachment there are pictures of my ray tracing plot for a study with fixed refractive index (light is collimated) and for a study with frequency dependent refractive index (no collimation).
What am I doing wrong?
Thanks.
I am trying to define a frequency dependent refractive index in Comsol 5.
I have a txt file with the value of the RI for different frequencies and I loaded it in Global/Definition/Function/Interpolation. I then checked the "Frequency dependent refractive index" box in the Geometrical Optics physics and selected a Normal distribution with number of values N=10, mean 4.54e14[Hz] and sigma 1E14[Hz].
When I compute the study (in my geometry there are only a conical light source and a collimating lens) and plot the ray trajectories it's as if the lens isn't there. The light travels through and is not collimated at all. In attachment there are pictures of my ray tracing plot for a study with fixed refractive index (light is collimated) and for a study with frequency dependent refractive index (no collimation).
What am I doing wrong?
Thanks.
Attachments:
1 Reply Last Post Oct 22, 2015, 12:52 p.m. EDT
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Posted:
9 years ago
Hi, is there any way you can attach your model? It's difficult to say what the problem could be without it.
Dan
Dan