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Subdomain integration for effecive area calculation in PCF

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Jais John

Jais John

March 15, 2010 12:59pm UTC

Subdomain integration for effecive area calculation in PCF

Hi,
I am doing a project based on parametric analysis of Photonic crystal fiber. For calculating effective area, I selected the option subdomain integration. I have given Ex*conj(Ex) to calculate numerator and (Ex*conj(Ex))^2 for denominator.

My doubt is in effective area equation for numerator one square term is there.
Is it need to square the value again in numarator?

For more clarification please go through the attachment..

Thanks in advance...

Jais John

Attachments:   Effective area calculation.docx  

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Ivar Kjelberg

Ivar Kjelberg
Moderator

March 15, 2010 3:09pm UTC in response to Jais John

Re: Subdomain integration for effecive area calculation in PCF

Hi

from the dimensions here I believe you should respect the formula, no ?

if E is in [V/m] then ¦E¦^2 is (V/m)^2, now dx and dy are both in [m] (note current version 3.5a of Comsol tends to forget this in their integration variables) so your numerator is simply of units V^4

while the denominator is (V/m)^4*m^2 = V^4/m^2, which gives, once divided one by the other a unit of [m^2] for an area, and that is what I would expect, ... no ?

But this does still not necessarily mean that the formula is correct for what you are looking for ...

Hope this helps
Ivar

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