Spirals

class picwriter.components.Spiral(wgt, width, length, spacing=None, parity=1, port=(0, 0), direction=u'NORTH')

Spiral Waveguide Cell class. The desired length of the spiral is first set, along with the spacing between input and output (the ‘width’ paramter). Then, the corresponding height of the spiral is automatically set.

Args:

• wgt (WaveguideTemplate): WaveguideTemplate object
• width (float): width of the spiral (i.e. distance between input/output ports)
• length (float): desired length of the waveguide

Keyword Args:

• spacing (float): distance between parallel waveguides
• parity (int): If 1 spiral on right side, if -1 spiral on left side (mirror flip)
• port (tuple): Cartesian coordinate of the input port
• direction (string): Direction that the component will point towards, can be of type ‘NORTH’, ‘WEST’, ‘SOUTH’, ‘EAST’, OR an angle (float, in radians)

Members:

• portlist (dict): Dictionary with the relevant port information

Portlist format:

• portlist[‘input’] = {‘port’: (x1,y1), ‘direction’: ‘dir1’}
• portlist[‘output’] = {‘port’: (x2, y2), ‘direction’: ‘dir2’}

Where in the above (x1,y1) are the first elements of the spiral trace, (x2, y2) are the last elements of the spiral trace, and ‘dir1’, ‘dir2’ are of type ‘NORTH’, ‘WEST’, ‘SOUTH’, ‘EAST’, or an angle in radians. ‘Direction’ points towards the waveguide that will connect to it.