attenuating lp modes in a step-index fiber

opticspy / lightpipes

LightPipes for Python, "Pure Python version"

https://opticspy.github.io/lightpipes/

BSD 3-Clause "New" or "Revised" License

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attenuating lp modes in a step-index fiber #29

Open nahman opened 4 years ago

nahman commented 4 years ago

I am trying to propagate lp modes down a cylindrical step-index fiber using this package. Strangely enough, I am finding that the lp modes are attenuating as they go along the fiber, which of course should not be the case. Even stranger, if I divide the free-space wavelength by two, lightpipes seems to recover the expected result of no attenuation. I've attached a python notebook illustrating this behavior.

lpmode_prop.zip

FredvanGoor commented 4 years ago

Did you try to increase the number of grid points?

nahman commented 4 years ago

Yes, it doesn't seem to change the result.

On Thu, Jan 16, 2020, 2:22 AM FredvanGoor notifications@github.com wrote:

Did you try to increase the number of grid points?

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