Create EBeam_LukasChrostowski_MZI_1550.py

submissions/KLayout Python/EBeam_LukasChrostowski_MZI_1550.py

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+'''
+--- Simple MZI ---
+  
+by Lukas Chrostowski, 2024
+
+
+   
+Example simple script to
+ - create a new layout with a top cell
+ - create an MZI
+ - export to OASIS for submission to fabrication
+
+using SiEPIC-Tools function including connect_pins_with_waveguide and connect_cell
+
+Use instructions:
+
+Run in Python, e.g., VSCode
+
+pip install required packages:
+ - klayout, SiEPIC, siepic_ebeam_pdk, numpy
+
+'''
+
+designer_name = 'LukasChrostowski'
+top_cell_name = 'EBeam_%s_MZI' % designer_name
+export_type = 'static'  # static: for fabrication, PCell: include PCells in file
+
+import pya
+from pya import *
+
+import SiEPIC
+from SiEPIC._globals import Python_Env
+from SiEPIC.scripts import connect_cell, connect_pins_with_waveguide, zoom_out, export_layout
+from SiEPIC.utils.layout import new_layout, floorplan
+from SiEPIC.extend import to_itype
+from SiEPIC.verification import layout_check
+
+import os
+
+if Python_Env == 'Script':
+    # For external Python mode, when installed using pip install siepic_ebeam_pdk
+    import siepic_ebeam_pdk
+
+print('EBeam_LukasChrostowski_MZI layout script')
+
+tech_name = 'EBeam'
+
+from packaging import version
+if version.parse(SiEPIC.__version__) < version.parse("0.5.4"):
+    raise Exception("Errors", "This example requires SiEPIC-Tools version 0.5.4 or greater.")
+
+'''
+Create a new layout using the EBeam technology,
+with a top cell
+and Draw the floor plan
+'''    
+cell, ly = new_layout(tech_name, top_cell_name, GUI=True, overwrite = True)
+floorplan(cell, 605e3, 410e3)
+
+dbu = ly.dbu
+
+from SiEPIC.scripts import connect_pins_with_waveguide, connect_cell
+waveguide_type1='SiN Strip TE 1550 nm, w=750 nm'
+waveguide_type_delay='SiN routing TE 1550 nm (compound waveguide)'
+
+# Load cells from library
+cell_ebeam_gc = ly.create_cell('GC_SiN_TE_1550_8degOxide_BB', 'EBeam-SiN')
+
+# grating couplers, place at absolute positions
+x,y = 60000, 15000
+t = Trans(Trans.R0,x,y)
+instGC1 = cell.insert(CellInstArray(cell_ebeam_gc.cell_index(), t))
+t = Trans(Trans.R0,x,y+127000)
+instGC2 = cell.insert(CellInstArray(cell_ebeam_gc.cell_index(), t))
+
+# automated test label
+text = Text ("opt_in_TE_1550_device_%s_loopback" % designer_name, t)
+cell.shapes(ly.layer(ly.TECHNOLOGY['Text'])).insert(text).text_size = 5/dbu
+
+# Waveguides: 
+connect_pins_with_waveguide(instGC1, 'opt1', instGC2, 'opt1', waveguide_type=waveguide_type1)
+
+if 0:
+    # 3rd MZI, with a very long delay line
+    cell_ebeam_delay = ly.create_cell('spiral_paperclip', 'EBeam_Beta',
+                                    {'waveguide_type':waveguide_type_delay,
+                                    'length':200,
+                                    'flatten':True})
+    x,y = 60000, 205000
+    t = Trans(Trans.R0,x,y)
+    instGC1 = cell.insert(CellInstArray(cell_ebeam_gc.cell_index(), t))
+    t = Trans(Trans.R0,x,y+127000)
+    instGC2 = cell.insert(CellInstArray(cell_ebeam_gc.cell_index(), t))
+
+    # automated test label
+    text = Text ("opt_in_TE_1550_device_%s_MZI3" % designer_name, t)
+    cell.shapes(ly.layer(ly.TECHNOLOGY['Text'])).insert(text).text_size = 5/dbu
+
+    # Y branches:
+    instY1 = connect_cell(instGC1, 'opt1', cell_ebeam_y_dream, 'opt1')
+    instY1.transform(Trans(20000,0))
+    instY2 = connect_cell(instGC2, 'opt1', cell_ebeam_y_dream, 'opt1')
+    instY2.transform(Trans(20000,0))
+
+    # Spiral:
+    instSpiral = connect_cell(instY2, 'opt2', cell_ebeam_delay, 'optA')
+    instSpiral.transform(Trans(20000,0))
+
+    # Waveguides:
+    connect_pins_with_waveguide(instGC1, 'opt1', instY1, 'opt1', waveguide_type=waveguide_type)
+    connect_pins_with_waveguide(instGC2, 'opt1', instY2, 'opt1', waveguide_type=waveguide_type)
+    connect_pins_with_waveguide(instY1, 'opt2', instY2, 'opt3', waveguide_type=waveguide_type)
+    connect_pins_with_waveguide(instY2, 'opt2', instSpiral, 'optA', waveguide_type=waveguide_type)
+    connect_pins_with_waveguide(instY1, 'opt3', instSpiral, 'optB', waveguide_type=waveguide_type,turtle_B=[5,-90])
+
+# Zoom out
+zoom_out(cell)
+
+# Export for fabrication, removing PCells
+path = os.path.dirname(os.path.realpath(__file__))
+filename = os.path.splitext(os.path.basename(__file__))[0]
+if export_type == 'static':
+    file_out = export_layout(cell, path, filename, relative_path = '..', format='oas', screenshot=True)
+else:
+    file_out = os.path.join(path,'..',filename+'.oas')
+    ly.write(file_out)
+
+# Verify
+file_lyrdb = os.path.join(path,filename+'.lyrdb')
+num_errors = layout_check(cell = cell, verbose=False, GUI=True, file_rdb=file_lyrdb)
+print('Number of errors: %s' % num_errors)
+
+# Display the layout in KLayout, using KLayout Package "klive", which needs to be installed in the KLayout Application
+if Python_Env == 'Script':
+    from SiEPIC.utils import klive
+    klive.show(file_out, lyrdb_filename=file_lyrdb, technology=tech_name)