Input Field

[SUSMITA KARMAKAR]

How can I plot the graph of “bending loss”(in the Y axis) vs. “bending radius of optical fiber”(in the X axis)? Please find the attachment.

Attachments:

1. INPUT-BEAM.docx

[Scott Newman]

Hello Susmita,

Bending loss can be indirectly extracted by using the “Relative Power vs Distance” plot. This is enabled in the “Additional Output Options” selection under the “Simulation” Menu.

Run a simulation with a given radius and you can extract the power transmitted relative to input. You can convert this to a loss and from there an alpha. You would then run a parameter sweep where you change the radius and would have results for multiple radii allowing you to generate the bending loss versus bending radius.

Scott

[SUSMITA KARMAKAR]

How can I create “.f3d” file to give the input? Within OptiBPM software it is not possible. So how can I create?

[Cem Bonfil]

Hi Susmita,
You can create .f3d files from any programming or scripting language like Matlab or Python. It is basically a text file with a special extension. The details on how to set up file formats is in our documentation, typically located under C:/Program Files/Optiwave Software/OptiBPM 13/doc/OptiBPM_User_Reference.pdf. I believe what you are looking for is under page 744, Complex Data 3D File Format.

Cem

[SUSMITA KARMAKAR]

Thank you Cem Bonfil sir for your valuable reply. I am able to create .f3d file (Complex Data 3D File Format) using the procedure which are explained in OptiBPM_User_Reference.pdf. So if you kindly describe the scripting process (I saw VBscripting manual,but sir I didnot understand ). I want to convert
input= exp(-((r.^2)./W.^2)) (gaussian beam)
input= bessel j (0,kr.*r)).*exp(-((r.^2)./W.^2)) (bessel beam)
These above equations into .f3d file format. Sir kindly describe how can I convert MATLAB file into .f3d file.

[Author]

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