Relative placement of objects IΒΆ

Learning targets

  • Relative and global placement of geometrical objects
  • Alignment of object ports

This example shows how to construct an optical coupler based on two rip waveguides.

_images/ex2d_relative_alignment_mesh.png

The substrate consists of three layers which are aligned on top of each other. The rips are relatively aligned to the port North (upper center) of the top layer with a displacement to the left and right respectively.

.jcm Input File

  • layout.jcm [ASCII]

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    Layout2D {
  Name = "TutorialExample2D"
  UnitOfLength = 1e-06
  
  MeshOptions {
    MaximumSideLength = 1
  }
  Objects {  
    Parallelogram { 
      Priority = ComputationalDomain
      DomainId = 1
      BoundingBox {
        Offset = [0 0 0 1]
      }
    }
    
    Parallelogram { 
      Name = "Layer1"
      DomainId = 2
      Height = 1
      Width = 10
      Port = South
    }
    Parallelogram { 
      Name = "Layer2"
      DomainId = 3
      Height = 1
      Width = 10
      Alignment {
        Parent {
          Domain = "Layer1"
          Port = North
        }
        Orientation = AntiParallel
      }
    }
    Parallelogram { 
      Name = "Layer3"
      DomainId = 4
      Height = 0.5
      Width = 10
      Alignment {
        Parent {
          Domain = "Layer2"
          Port = North
        }
        Orientation = AntiParallel
      }
    }
    
    Trapezoid {
      Name = "RipLeft"
      DomainId = 5
      Height = 2
      Width = 3
      InnerAngles = [80 80]
      Port = South
      Alignment {
        Parent {
          Domain = "Layer3"
          Port = North
        }
        Orientation = AntiParallel
        Displacement = [-2 0]
      }   
    }
    
    Trapezoid {
      Name = "RipRight"
      DomainId = 5
      Height = 2
      Width = 3
      InnerAngles = [80 80]
      Port = South
      Alignment {
        Parent {
          Domain = "Layer3"
          Port = North
        }
        Orientation = AntiParallel
        Displacement = [2 0]
      }   
    }
  }
}