Create EBeam_LukasChrostowski_MZIx2.py

@omidesml to test the Hypothesis: MM waveguides will show less variability to manufacturing variations.

submissions/KLayout Python/EBeam_LukasChrostowski_MZIx2.py

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+'''
+--- Mach-Zehnder ---
+   
+by Lukas Chrostowski, 2024 
+ 
+Simple script to
+ - create a new layout with a top cell
+ - create the design
+    - approx dL = 100 micron
+    - two different MZI: one with single mode, one with multi-mode
+    - goal: see if MM waveguides have lower variability than SM, and quantify from FSR variations
+ - export to OASIS for submission to fabrication
+
+using SiEPIC-Tools function including connect_pins_with_waveguide and connect_cell
+
+usage:
+ - run this script in Python
+'''
+
+designer_name = 'LukasChrostowski'
+top_cell_name = 'EBeam_%s_MZIx2' % designer_name
+
+import pya
+from pya import Trans, CellInstArray, Text 
+
+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
+
+import os
+
+if Python_Env == 'Script':
+    try:
+        # For external Python mode, when installed using pip install siepic_ebeam_pdk
+        import siepic_ebeam_pdk
+    except:
+        # Load the PDK from a folder, e.g, GitHub, when running externally from the KLayout Application
+        import os, sys
+        path_GitHub = os.path.expanduser('~/Documents/GitHub/')
+        sys.path.append(os.path.join(path_GitHub, 'SiEPIC_EBeam_PDK/klayout'))
+        import siepic_ebeam_pdk
+
+tech_name = 'EBeam'
+
+if SiEPIC.__version__ < '0.5.1':
+    raise Exception("Errors", "This example requires SiEPIC-Tools version 0.5.1 or greater.")
+
+'''
+Create a new layout using the EBeam technology,
+with a top cell
+and Draw the floor plan
+'''    
+topcell, ly = new_layout(tech_name, top_cell_name, GUI=True, overwrite = True)
+floorplan(topcell, 605e3, 410e3)
+
+dbu = ly.dbu
+
+from SiEPIC.scripts import connect_pins_with_waveguide, connect_cell
+waveguide_type='Strip TE 1550 nm, w=500 nm'
+waveguide_type_delay='Si routing TE 1550 nm (compound waveguide)'
+
+# Load cells from library
+cell_ebeam_gc = ly.create_cell('GC_TE_1550_8degOxide_BB', tech_name)
+cell_ebeam_y = ly.create_cell('ebeam_y_1550', tech_name)
+
+# define parameters for the designs
+params = [1, 2, 3, 4, 5, 6]
+params_WG = [waveguide_type, waveguide_type_delay, waveguide_type, waveguide_type_delay, waveguide_type, waveguide_type_delay]
+
+for i in range(0,len(params)):
+    cell = ly.create_cell('cell%s' % i)
+
+    dy = -51000 # -53000 # good for 4
+    min_gc_pitch = 60100
+    dx = (min_gc_pitch**2 - dy**2) ** 0.5
+    x,y = dx*i, dy*i
+    t = Trans(Trans.R0,x,y)
+    topcell.insert(CellInstArray(cell.cell_index(), t))
+
+    x,y = 41000, 269000
+    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_MZI%s" % (designer_name, params[i]), t)
+    cell.shapes(ly.layer(ly.TECHNOLOGY['Text'])).insert(text).text_size = 5/dbu
+
+    # Y branches:
+    instY1 = connect_cell(instGC2, 'opt1', cell_ebeam_y, 'opt1')
+    instY1.transform(Trans(10000,-16000))
+    instY2 = connect_cell(instGC2, 'opt1', cell_ebeam_y, 'opt1')
+
+    # Waveguides:
+    L = 370
+    connect_pins_with_waveguide(instGC1, 'opt1', instY1, 'opt1', waveguide_type=waveguide_type, turtle_A=[5,90,15,90, 20,-90])
+    connect_pins_with_waveguide(instY1, 'opt2', instY2, 'opt3', waveguide_type=params_WG[i], turtle_A=[L,90,1,90])
+    instWG = connect_pins_with_waveguide(instY1, 'opt3', instY2, 'opt2', waveguide_type=params_WG[i], turtle_A=[5,-90,10,-90,20,90,10,90,23,90]) # turtle_A=[50,90,1,90])
+    instWG.transform(Trans(L/dbu,0))
+    connect_pins_with_waveguide(instY1, 'opt3', instWG, 'opt1', waveguide_type=params_WG[i])
+    connect_pins_with_waveguide(instY2, 'opt2', instWG, 'opt2', waveguide_type=params_WG[i])
+
+
+
+# Zoom out
+zoom_out(cell)
+
+# Save
+path = os.path.dirname(os.path.realpath(__file__))
+filename = os.path.splitext(os.path.basename(__file__))[0]
+file_out = export_layout(cell, path, filename, relative_path = '..', format='oas', screenshot=False)
+
+# 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, technology=tech_name)