Discontinuities while drawing curves on Nazca

[Rezwan Zakaria]

I am trying to draw a cobra curve connecting a strt (straight box) and a bend (curved polygon) on Nazca design. But after drawing, I see some discontinuities at the interface of the curve and the strt/bend. Can anyone please clarify this? I got this code from the nazca tutorial section, so I think the code cannot be incorrect. I have attached some pictures The code is as follows:

import nazca as nd
import nazca.demofab as demo
b1 = demo.shallow.strt(length=100).put(0, 0)
b2 = demo.shallow.bend(angle=45, radius=50).put(200, 300)
demo.shallow.cobra_p2p(pin1=b1.pin[‘a0’], pin2=b2.pin[‘a0′], radius1=150, radius2=200).put()
nd.export_gds(filename=’cobra3b.gds’)

 

[Katarzyna]

These are bend-straight waveguide offsets, a common feature in photonics:
pure.tue.nl/ws/files/4294122/590296.pdf

You can either create your own interconnect without offsets:
tutorial: nazca-design.org/xsections_and_layers/,

or set demo.shallow.offset = 0, for example:

import nazca as nd
import nazca.demofab as demo

demo.shallow.strt(100).put()
demo.shallow.bend().put()

demo.shallow.offset = 0
demo.shallow.strt(100).put(0, 100)
demo.shallow.bend().put()

nd.export_gds()

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