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- SiN library for 895 nm components - SiN Waveguide definition Former-commit-id: feaf4f8
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,103 @@ | ||
| <?xml version="1.0" encoding="utf-8"?> | ||
| <klayout-macro> | ||
| <description/> | ||
| <version/> | ||
| <category>pymacros</category> | ||
| <prolog/> | ||
| <epilog/> | ||
| <doc/> | ||
| <autorun>true</autorun> | ||
| <autorun-early>false</autorun-early> | ||
| <priority>0</priority> | ||
| <shortcut/> | ||
| <show-in-menu>false</show-in-menu> | ||
| <group-name/> | ||
| <menu-path/> | ||
| <interpreter>python</interpreter> | ||
| <dsl-interpreter-name/> | ||
| <text>""" | ||
| This file is part of the SiEPIC_EBeam_PDK | ||
|
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||
| This file implements a library called "EBeam-SiN", for silicon nitride | ||
| """ | ||
| print('siepic_ebeam_library_SiN') | ||
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||
| import pya | ||
| from pya import * | ||
| from SiEPIC.utils import get_technology_by_name | ||
| import os | ||
| import pathlib | ||
| import sys | ||
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||
| dir_path = os.path.dirname(os.path.realpath(__file__)) | ||
| if dir_path not in sys.path: | ||
| sys.path.append(dir_path) | ||
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| files = [f for f in os.listdir(os.path.join(os.path.dirname( | ||
| os.path.realpath(__file__)),'pcells_SiN')) if '.py' in pathlib.Path(f).suffixes and '__init__' not in f] | ||
| import pcells_SiN ### folder name ### | ||
| import importlib | ||
| importlib.invalidate_caches() | ||
| pcells_=[] | ||
| for f in files: | ||
| module = 'pcells_SiN.%s' % f.replace('.py','') ### folder name ### | ||
| print(' - found module: %s' % module) | ||
| m = importlib.import_module(module) | ||
| print(m) | ||
| pcells_.append(importlib.reload(m)) | ||
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| class siepic_ebeam_library_hubbard(Library): | ||
| """ | ||
| The library where we will put the PCells and GDS into | ||
| """ | ||
|
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| def __init__(self): | ||
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| tech_name = 'EBeam' | ||
| library = tech_name +'-SiN' | ||
| self.technology=tech_name | ||
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| print("Initializing '%s' Library." % library) | ||
|
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| # Set the description | ||
| self.description = "Silicon Nitride" | ||
|
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| # Save the path, used for loading WAVEGUIDES.XML | ||
| import os | ||
| self.path = os.path.dirname(os.path.realpath(__file__)) | ||
|
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| # Import all the GDS files from the tech folder | ||
| import os, fnmatch | ||
| dir_path = os.path.normpath(os.path.join(os.path.dirname(os.path.realpath(__file__)), "../gds/EBeam_SiN")) | ||
| print(' library path: %s' % dir_path) | ||
| search_str = '*.[Oo][Aa][Ss]' # OAS | ||
| for root, dirnames, filenames in os.walk(dir_path, followlinks=True): | ||
| for filename in fnmatch.filter(filenames, search_str): | ||
| file1=os.path.join(root, filename) | ||
| print(" - reading %s" % file1 ) | ||
| self.layout().read(file1) | ||
| search_str = '*.[Gg][Dd][Ss]' # GDS | ||
| for root, dirnames, filenames in os.walk(dir_path, followlinks=True): | ||
| for filename in fnmatch.filter(filenames, search_str): | ||
| file1=os.path.join(root, filename) | ||
| print(" - reading %s" % file1 ) | ||
| self.layout().read(file1) | ||
|
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||
| # Create the PCell declarations | ||
| for m in pcells_: | ||
| mm = m.__name__.replace('pcells_SiN.','') | ||
| mm2 = m.__name__+'.'+mm+'()' | ||
| print(' - register_pcell %s, %s' % (mm,mm2)) | ||
| self.layout().register_pcell(mm, eval(mm2)) | ||
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| print(' done with pcells') | ||
|
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| # Register us the library with the technology name | ||
| # If a library with that name already existed, it will be replaced then. | ||
| self.register(library) | ||
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| # Instantiate and register the library | ||
| siepic_ebeam_library_hubbard() | ||
| </text> | ||
| </klayout-macro> |
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klayout/EBeam/pymacros/pcells_SiN/ebeam_dc_SiN_TE_895.py
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| import pya | ||
| from pya import * | ||
|
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||
| class ebeam_dc_SiN_TE_895(pya.PCellDeclarationHelper): | ||
| """ | ||
| The PCell declaration for the Directional Coupler | ||
| by Lukas Chrostowski, 2018/09 | ||
| compact model in INTERCONNECT based on: | ||
| - https://kx.lumerical.com/t/lcml-directional-coupler-based-on-lookup-table-lcml-dc-strip-1550-lookuptable/2094 | ||
| - only parameterized for Lc, for the 500 x 220 nm waveguide with 200 nm gap, and 5 micron radius | ||
| could be improved: | ||
| - https://kx.lumerical.com/t/lcml-directional-coupler-based-on-analytical-functions-lcml-dc-strip-1550-analytical/2091 | ||
| - updated for SiN at 895 nm | ||
| """ | ||
|
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| def __init__(self): | ||
|
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| # Important: initialize the super class | ||
| super(ebeam_dc_SiN_TE_895, self).__init__() | ||
| from SiEPIC.utils import get_technology_by_name | ||
| TECHNOLOGY = get_technology_by_name('EBeam') | ||
|
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| # declare the parameters | ||
| self.param("Lc", self.TypeDouble, "Coupler Length", default = 20.0) | ||
| self.param("silayer", self.TypeLayer, "SiN Layer", default = TECHNOLOGY['SiN']) | ||
| self.param("pinrec", self.TypeLayer, "PinRec Layer", default = TECHNOLOGY['PinRec']) | ||
| self.param("devrec", self.TypeLayer, "DevRec Layer", default = TECHNOLOGY['DevRec']) | ||
| self.param("textl", self.TypeLayer, "Text Layer", default = LayerInfo(10, 0)) | ||
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| def display_text_impl(self): | ||
| # Provide a descriptive text for the cell | ||
| return "ebeam_dc_SiN_TE_895(Lc=" + ('%.3f' % self.Lc) + ")" | ||
|
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| def can_create_from_shape_impl(self): | ||
| return False | ||
|
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| def produce_impl(self): | ||
| # This is the main part of the implementation: create the layout | ||
|
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| # Fixed PCell parameters | ||
| port_spacing = 2000 # spacing of the two ports, determines the angle required by the s-bend. | ||
| r = 25000 # radius | ||
| w = 450 # waveguide width | ||
| g = 400 # gap | ||
|
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| from math import pi, cos, sin, acos | ||
| from SiEPIC.utils import arc_wg, arc_wg_xy | ||
| from SiEPIC._globals import PIN_LENGTH | ||
|
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| # fetch the parameters | ||
| dbu = self.layout.dbu | ||
| ly = self.layout | ||
| shapes = self.cell.shapes | ||
| LayerSiN = ly.layer(self.silayer) | ||
| LayerPinRecN = ly.layer(self.pinrec) | ||
| LayerDevRecN = ly.layer(self.devrec) | ||
| TextLayerN = ly.layer(self.textl) | ||
|
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| Lc = int(round(self.Lc/dbu)) | ||
|
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| # Create the parallel waveguides | ||
| if Lc > 0: | ||
| wg1 = Box(-Lc/2, -w/2+(w+g)/2, Lc/2, w/2+(w+g)/2) | ||
| shapes(LayerSiN).insert(wg1) | ||
| wg1 = Box(-Lc/2, -w/2-(w+g)/2, Lc/2, w/2-(w+g)/2) | ||
| shapes(LayerSiN).insert(wg1) | ||
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| dc_angle = acos((r-abs(port_spacing/2))/r)*180/pi | ||
|
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| # bottom S-bends | ||
| self.cell.shapes(LayerSiN).insert(arc_wg_xy(Lc/2,-r-(w+g)/2, r, w, 90-dc_angle, 90)) | ||
| self.cell.shapes(LayerSiN).insert(arc_wg_xy(-Lc/2, -r-(w+g)/2, r, w, 90, 90+dc_angle)) | ||
| y_bottom = round(-2*(1-cos(dc_angle/180.0*pi))*r)-(w+g)/2 | ||
| x_bottom = round(2*sin(dc_angle/180.0*pi)*r) | ||
| t = Trans(Trans.R0,-x_bottom-Lc/2, y_bottom+r) | ||
| self.cell.shapes(LayerSiN).insert(arc_wg(r, w, -90, -90+dc_angle).transformed(t)) | ||
| t = Trans(Trans.R0,x_bottom+Lc/2, y_bottom+r) | ||
| self.cell.shapes(LayerSiN).insert(arc_wg(r, w, -90-dc_angle, -90).transformed(t)) | ||
|
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||
| # top S-bends | ||
| self.cell.shapes(LayerSiN).insert(arc_wg_xy(Lc/2,r+(w+g)/2, r, w, 270, 270+dc_angle)) | ||
| self.cell.shapes(LayerSiN).insert(arc_wg_xy(-Lc/2, r+(w+g)/2, r, w, 270-dc_angle, 270)) | ||
| y_top = round(2*(1-cos(dc_angle/180.0*pi))*r)+(w+g)/2 | ||
| x_top = round(2*sin(dc_angle/180.0*pi)*r) | ||
| t = Trans(Trans.R0,-x_top-Lc/2, y_top-r) | ||
| self.cell.shapes(LayerSiN).insert(arc_wg(r, w, 90-dc_angle, 90).transformed(t)) | ||
| t = Trans(Trans.R0,x_top+Lc/2, y_top-r) | ||
| self.cell.shapes(LayerSiN).insert(arc_wg(r, w, 90, 90+dc_angle).transformed(t)) | ||
|
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||
| # Pins on the bottom waveguide side: | ||
| pin = Path([Point(-x_bottom+PIN_LENGTH/2-Lc/2, y_bottom), Point(-x_bottom-PIN_LENGTH/2-Lc/2, y_bottom)], w) | ||
| shapes(LayerPinRecN).insert(pin) | ||
| text = Text ("pin1", Trans(Trans.R0, -x_bottom-Lc/2, y_bottom)) | ||
| shape = shapes(LayerPinRecN).insert(text) | ||
| shape.text_size = 0.4/dbu | ||
|
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| pin = Path([Point(x_bottom-PIN_LENGTH/2+Lc/2, y_bottom), Point(x_bottom+PIN_LENGTH/2+Lc/2, y_bottom)], w) | ||
| shapes(LayerPinRecN).insert(pin) | ||
| text = Text ("pin3", Trans(Trans.R0, x_bottom+Lc/2, y_bottom)) | ||
| shape = shapes(LayerPinRecN).insert(text) | ||
| shape.text_size = 0.4/dbu | ||
| shape.text_halign = 2 | ||
|
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| # Pins on the top waveguide side: | ||
| pin = Path([Point(-x_bottom+PIN_LENGTH/2-Lc/2, y_top), Point(-x_bottom-PIN_LENGTH/2-Lc/2, y_top)], w) | ||
| shapes(LayerPinRecN).insert(pin) | ||
| text = Text ("pin2", Trans(Trans.R0, -x_bottom-Lc/2, y_top)) | ||
| shape = shapes(LayerPinRecN).insert(text) | ||
| shape.text_size = 0.4/dbu | ||
|
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| pin = Path([Point(x_bottom-PIN_LENGTH/2+Lc/2, y_top), Point(x_bottom+PIN_LENGTH/2+Lc/2, y_top)], w) | ||
| shapes(LayerPinRecN).insert(pin) | ||
| text = Text ("pin4", Trans(Trans.R0, x_bottom+Lc/2, y_top)) | ||
| shape = shapes(LayerPinRecN).insert(text) | ||
| shape.text_size = 0.4/dbu | ||
| shape.text_halign = 2 | ||
|
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| # Merge all the waveguide shapes, to avoid any small gaps | ||
| layer_temp = self.layout.layer(LayerInfo(913, 0)) | ||
| shapes_temp = self.cell.shapes(layer_temp) | ||
| ShapeProcessor().merge(self.layout,self.cell,LayerSiN,shapes_temp,True,0,True,True) | ||
| self.cell.shapes(LayerSiN).clear() | ||
| shapes_SiN = self.cell.shapes(LayerSiN) | ||
| ShapeProcessor().merge(self.layout,self.cell,layer_temp, shapes_SiN,True,0,True,True) | ||
| self.cell.shapes(layer_temp).clear() | ||
|
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| # Create the device recognition layer -- make it 1 * wg_width away from the waveguides. | ||
| dev = Box(-x_bottom-Lc/2, y_bottom-w/2-w, x_bottom+Lc/2, y_top+w/2+w ) | ||
| shapes(LayerDevRecN).insert(dev) | ||
|
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||
| # Compact model information | ||
| t = Trans(Trans.R0, 0, -w) | ||
| text = Text ("Lumerical_INTERCONNECT_library=Design kits/EBeam", t) | ||
| shape = shapes(LayerDevRecN).insert(text) | ||
| shape.text_size = r*0.017 | ||
| t = Trans(Trans.R0, 0, 0) | ||
| text = Text ('Component=ebeam_dc_te1550', t) | ||
| shape = shapes(LayerDevRecN).insert(text) | ||
| shape.text_size = r*0.017 | ||
| t = Trans(Trans.R0, 0, w) | ||
| text = Text ('Spice_param:wg_width=%.3fu gap=%.3fu radius=%.3fu Lc=%.3fu'%(w*dbu,g*dbu,r*dbu,self.Lc), t) | ||
| shape = shapes(LayerDevRecN).insert(text) | ||
| shape.text_size = r*0.017 | ||
|
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| print("Done drawing the layout for - ebeam_dc_SiN_TE_895: %.3f" % ( self.Lc) ) | ||
|
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