back to all tutorials

Making a building block from GDS

How to make a building from GDS file

# example created by Bright Photonics

import nazca as nd

with nd.Cell(name='mmi_bb') as mmi_bb:
    # load GDS BB
    mmi = nd.load_gds(
        filename='mmi_bb.gds',
        cellname='mmi'
        )
    mmi.put()

    # Add Pins
    nd.Pin('a0', width=2).put(0, 0, 180)
    nd.Pin('b0', width=2).put(40, 2.5, 0)
    nd.Pin('b1', width=2).put(40, -2.5, 0)

bb = mmi_bb.put(0)
# connect to mmi Pin 'b0' and 'b1'
nd.bend(angle=90, width=2, layer=1).put(bb.pin['b0'])
nd.bend(angle=-90, width=2, layer=1).put(bb.pin['b1'])

nd.export_gds()

In this example we show how to load a MMI GDS building block and add Pins ‘a0’, ‘b0’ and ‘b1’ to the block. Having the Pins set at the input and output ports of the MMI, it is easy to connect to this building block and draw the layout.

We can also add stubs and the boundary around the MMI to better visualize the component.

# example created by Bright Photonics

import nazca as nd

with nd.Cell(name='mmi_bb') as mmi_bb:
    # load GDS BB
    mmi = nd.load_gds(
        filename='mmi_bb.gds',
        cellname='mmi'
        )
    mmi.put()

    # Add Pins
    nd.Pin('a0', width=2).put(0, 0, 180)
    nd.Pin('b0', width=2).put(40, 2.5, 0)
    nd.Pin('b1', width=2).put(40, -2.5, 0)

    # Put stubs
    nd.put_stub()

    # Put boundary around the mmi bb
    nd.put_boundingbox('org', length=40, width=10)

bb = mmi_bb.put(0)
# connect to mmi Pin 'b0' and 'b1'
nd.bend(angle=90, width=2, layer=1).put(bb.pin['b0'])
nd.bend(angle=-90, width=2, layer=1).put(bb.pin['b1'])

nd.export_gds()

back to all tutorials

Related Tutorials