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SiEPIC / openEBL-2024-10-SiN

Submission for fabrication of silicon photonics for the openEBL Silicon Nitride run, siepic.ca/openebl
MIT License
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new and updated designs #18

Open newmansc2 opened 2 days ago

newmansc2 commented 2 days ago

Updated CDC design using s-bends and new CDC designs with s-bends

lukasc-ubc commented 1 day ago

Hi Scott,

I am wondering why you aren't using the CDC that includes the S-bend inside? This avoids the overlapping errors you have.

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newmansc2 commented 1 day ago

Hi Lukas - I didn't use the CDC p-cell with an S-bends (contra_directional_coupler) because I thought I saw in another thread that it had an issue with 0.75um WG width. I just tested that p-cell and I see that it works with the 0.75um WG width.

However, I am iterating on a baseline CDC design (for which we have data) that uses the Contra_DC_custom p-cell and has non-equal inner and outer corrugation widths. I am hesitant to switch to the contra_directional_coupler p-cell, which only has equal inner/outer corrugation widths. I don't know what impact this parameter will have on device performance.

newmansc2 commented 1 day ago

Here is the comment on the CDC p-cell issue I was referring to: https://github.com/SiEPIC/SiEPIC_EBeam_PDK/issues/301