nazca.demofab package¶

Submodules¶

nazca.demofab.pdk module¶

DEMO PDK initialization.

An example on how to initialize foundry specific technology settings. DEMO PDK is for Nazca tutorials and PIC design training.

Note

Any resemblence of technology details in the DEMO PDK with an actual foundry is purely coincidental.

nazca.demofab.pdk_10_materials module¶

DEMO PDK material settings.

This module is intended to define the material models and materials used in the DEMOfab.

Note that for layout purposes this module is not required.

nazca.demofab.pdk_10_materials.N(wl, pol, **kwargs)¶

nazca.demofab.pdk_15_xsections module¶

DEMO PDK, EPI and xsectional waveguide structures.

This module is intended to define the xsectional structure of the waveguides in a technology. The structure can be defined using horizontal and vertical layers stacks of the materials defined in pdk_10_materials.py.

Note that for layout purposes this module is not required.

nazca.demofab.pdk_20_technology module¶

DEMO PDK technology settings.

This module is intended to define the mask layers and xsections of a technology, which can be accomplished by loading the coresponding csv tables with those settings and/or use the nazca function that add layers and sections.

The Xsection objects are defined in this module. A xsection corresponds typically to a waveguide or metal line. The following properies of the xsection can be set

os: straight-to-bend waveguide offset

width: default waveguide width

radius: default bend radius

taper: taper length

nazca.demofab.pdk_20_technology.os_deep(width, radius)¶

Offset straight to bend for deep waveguides.

Parameters

width (float) – waveguide width
radius (float) – waveguide radius

Returns

offset value

Return type

float

nazca.demofab.pdk_20_technology.os_shallow(width, radius)¶

Offset straight to bend for shallow waveguides.

Parameters

width (float) – waveguide width
radius (float) – waveguide radius

Returns

offset value

Return type

float

nazca.demofab.pdk_30_BB_library module¶

DEMO PDK building block definition.

This module is intended to define the building blocks of a technology. Building block definitions makes use of building block template functions.

This module also defines the default Interconnect objects, which greatly facilitate making waveguide or metal interconnects between building blocks.

To see the available building block and their details.

nazca.demofab.pdk_30_BB_library.BBcells()¶

nazca.demofab.pdk_30_BB_library.Tp_isolation(name='isolation', length=100, xs=None, width=None, layer=None)¶: Template funtion.

nazca.demofab.pdk_30_BB_library.abb_eopm_dc(length=750, contacts=2)¶

Create an electro-optic phase modulator cell.

Parameters: length (float) – length of the modulator section in um
Returns: eopm element
Return type: Cell

nazca.demofab.pdk_30_BB_library.bb_amplifiers = <nazca.bb_util.Functional_group object>¶: SOAs

nazca.demofab.pdk_30_BB_library.bb_awgs = <nazca.bb_util.Functional_group object>¶: AWG multiplexers

nazca.demofab.pdk_30_BB_library.bb_combiners = <nazca.bb_util.Functional_group object>¶: power splitter and combiners

nazca.demofab.pdk_30_BB_library.bb_connectors = <nazca.bb_util.Functional_group object>¶: inter-connectors

nazca.demofab.pdk_30_BB_library.bb_io_electrical = <nazca.bb_util.Functional_group object>¶: electrical IO (pads)

nazca.demofab.pdk_30_BB_library.bb_io_optical = <nazca.bb_util.Functional_group object>¶: optical IO (edge or surface)

nazca.demofab.pdk_30_BB_library.bb_mode_adapters = <nazca.bb_util.Functional_group object>¶: spot size convertors

nazca.demofab.pdk_30_BB_library.bb_mode_filters = <nazca.bb_util.Functional_group object>¶: mode filters

nazca.demofab.pdk_30_BB_library.bb_modulators = <nazca.bb_util.Functional_group object>¶: modulators

nazca.demofab.pdk_30_BB_library.bb_photodiodes = <nazca.bb_util.Functional_group object>¶: photo diodes

nazca.demofab.pdk_30_BB_library.bb_splitters = <nazca.bb_util.Functional_group object>¶: power splitter and combiners

nazca.demofab.pdk_30_BB_library.bb_tapers = <nazca.bb_util.Functional_group object>¶: tapers between different widths

nazca.demofab.pdk_30_BB_library.bb_transitions = <nazca.bb_util.Functional_group object>¶: xsection transistions

nazca.demofab.pdk_30_BB_library.dbr(length=100, pitch=0.25, duty_cycle=0.5)¶

Create a DBR cell.

Parameters

length (float) – length of DBR section in um
pitch (float) – pitch (full period) of dbr in um
duty_cycle (float) – duty cycle of grating (default = 0.5)

Returns

dbr element

Return type

Cell

nazca.demofab.pdk_30_BB_library.dbr_laser(Ldbr1=50, Ldbr2=500, Lsoa=750, Lpm=70)¶: Create a parametrized dbr laser building block.

nazca.demofab.pdk_30_BB_library.deep = <nazca.interconnects.Interconnect object>¶: ‘Deep’ interconnect

nazca.demofab.pdk_30_BB_library.eopm_dc(length=1000, pads=False, sep=10)¶

EOPM with pad option.

Parameters

length (float) – modulator length in um
pads (bool) – draw pads if True (default = False)
sep (float) – separation of pad bbox from eopm stub.

Returns

eopm element

Return type

Cell

nazca.demofab.pdk_30_BB_library.io(shape=None, width=3.0, bend=False, deep=False)¶

Create an IO cells that for edge coupling waveguide interfaces.

Parameters

shape (str) – shape of IO. values: None | ‘simple’ | ‘tapered’ | ‘angled’
bend (bool) – make the IO connection horizontal (True) for connecting to layout
deep (bool) – add a transition to a deeply-etched waveguides (default = False)

Returns

io element

Return type

Cell

nazca.demofab.pdk_30_BB_library.isolation_act(length=100)¶

Create a p-isolation cell.

Parameters: length (float) – length of the isolation section in um
Returns: isolation element
Return type: Cell

nazca.demofab.pdk_30_BB_library.isolation_sh(length=100)¶

Create a p-isolation cell.

Parameters: length (float) – length of the isolation section in um
Returns: isolation element
Return type: Cell

nazca.demofab.pdk_30_BB_library.metaldc = <nazca.interconnects.Interconnect object>¶: ‘MetalDC’ interconnect

nazca.demofab.pdk_30_BB_library.metalrf = <nazca.interconnects.Interconnect object>¶: ‘MetalRF’ interconnect

nazca.demofab.pdk_30_BB_library.mzi(length=1000, sep=50)¶

nazca.demofab.pdk_30_BB_library.pd_dc(length=100, pads=False, dy=0)¶

“PhotoDiode with pad option.

Parameters

length (float) – PD length in um
pads (bool) – draw pads if True (default = False)
(float (sep) – separation of pad bbox from pin stub.

Returns

PD element

Return type

Cell

nazca.demofab.pdk_30_BB_library.phase_shifter(length=100)¶

Create a current injection phase shifting cell.

Parameters: length (float) – length of phase section in um
Returns: phase-shifter element
Return type: Cell

nazca.demofab.pdk_30_BB_library.shallow = <nazca.interconnects.Interconnect object>¶: ‘Shallow’ interconnect

nazca.demofab.pdk_30_BB_library.soa(length=100, pad=True)¶

Create a SOA cell.

Parameters: length (float) – length of gain section in um
Returns: SOA element
Return type: Cell

nazca.demofab.pdk_30_BB_library.soa_sh(length=100)¶

Create a SOA cell with Shallow io.

Parameters: length (float) – length of gain section in um
Returns: SOA element
Return type: Cell

nazca.demofab.pdk_30_BB_library.xsDeep = <nazca.xsection.Xsection object>¶: ‘Deep’ xsection

nazca.demofab.pdk_30_BB_library.xsMetalDC = <nazca.xsection.Xsection object>¶: ‘MetalDC’ xsection

nazca.demofab.pdk_30_BB_library.xsMetalRF = <nazca.xsection.Xsection object>¶: ‘MetalRF’ xsection

nazca.demofab.pdk_30_BB_library.xsShallow = <nazca.xsection.Xsection object>¶: ‘Shallow’ xsection

nazca.demofab.pdk_40_project_templates module¶

DEMO PDK project definition.

This module is intended to define the cell templates of a technology, e.g. the cells for an MPW. It may contains cells that define optical or electrical IO functionality of the die with the external world, e.g. fiber-coupling or wire-bonding.

class nazca.demofab.pdk_40_project_templates.DesignArea(name='DesignArea', length=4000, height=4000, cleave=100, coatingL='NO', coatingR='NO', pitch=50)¶

Bases: object

Class containing a Die - Design Area template for Demofab.

cell()¶

Create a Project Cell with IO postition pins.

Returns: cell containing design area and cleave boundaries
Return type: Cell

coating(coatingL='NO', coatingR='NO')¶

Set coating at the left and at the right side of the design area.

Parameters

coatingL (str) – coating type on left side of the die: AR | HR | NO | DC: (default = ‘NO’)
coatingR (str) – coating type on right side of the die: AR | HR | NO | DC: (default = ‘NO’)

Returns

None

get_NIO()¶

Returns: number of optical IOs
Return type: int

get_cleave()¶

Returns: cleave of the design area
Return type: float

get_height()¶

Returns: height of the design area
Return type: float

get_length()¶

Returns: length of the design area
Return type: float

size(length=4000, height=4000)¶

Set size of the design area.

Parameters

length (float) – physical length of the die after dicing in um
width (float) – physical width of the die after dicingin um

Returns

None

nazca.demofab.pdk_40_project_templates.presetio(pin, bend=False, deep=False)¶

Returns a preset IO cell based on the attributes of the provided pin.

The cp will be updated to cp = pin.

Parameters

bend (bool) – Add a bend to horizontal alignment in case of an angled input guide
transition (bool) – Add a transition element to the deep waveguide xsection

Returns

cell containing the io element

Return type

Cell

nazca.demofab.pdk_white module¶

Module contents¶

DEMO PDK initialization.

An example on how to initialize foundry specific technology settings. DEMO PDK is for Nazca tutorials and PIC design training.

Note

Any resemblence of technology details in the DEMO PDK with an actual foundry is purely coincidental.