gdsfactory.cross_section.rib_with_trenches

gdsfactory.cross_section.rib_with_trenches#

gdsfactory.cross_section.rib_with_trenches(width=0.5, width_trench=2.0, slab_offset=0.3, width_slab=None, simplify_slab=None, layer='WG', layer_trench='DEEP_ETCH', wg_marking_layer='WG_ABSTRACT', sections=None, **kwargs)[source]#

Return CrossSection of rib waveguide defined by trenches.

Parameters:

  • width (float) – main Section width (um) or function parameterized from 0 to 1. the width at t==0 is the width at the beginning of the Path. the width at t==1 is the width at the end.

  • width_trench (float) – in um.

  • slab_offset (float | None) – from the edge of the trench to the edge of the slab.

  • width_slab (float | None) – in um.

  • simplify_slab (float | None) – Optional Tolerance value for the simplification algorithm. All points that can be removed without changing the resulting polygon by more than the value listed here will be removed.

  • layer (tuple[int, int] | str | int | LayerEnum) – slab layer.

  • layer_trench (tuple[int, int] | str | int | LayerEnum) – layer to etch trenches.

  • wg_marking_layer (tuple[int, int] | str | int | LayerEnum) – layer to draw over the actual waveguide. This can be useful for booleans, routing, placement …

  • sections (tuple[Section, ...] | None) – list of Sections(width, offset, layer, ports).

  • kwargs (Any) – cross_section settings.

Return type:

CrossSection

               ┌─────────┐
               │         │ wg_marking_layer
               └─────────┘

      ┌────────┐         ┌────────┐
      │        │         │        │layer_trench
      └────────┘         └────────┘

┌─────────────────────────────────────────┐
│                                  layer  │
│                                         │
└─────────────────────────────────────────┘
               ◄─────────►
                  width
┌─────┐         ┌────────┐        ┌───────┐
│     │         │        │        │       │
│     └─────────┘        └────────┘       │
│     ◄---------►         ◄-------►       │
└─────────────────────────────────────────┘
                                   slab_offset
     width_trench                  ──────►
                                          |
◄────────────────────────────────────────►
             width_slab

import gdsfactory as gf

xs = gf.cross_section.rib_with_trenches(width=0.5)
p = gf.path.arc(radius=10, angle=45)
c = p.extrude(xs)
c.plot()

(Source code, png, hires.png, pdf)

../_images/gdsfactory-cross_section-rib_with_trenches-1.png
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