A parameterized waveguide taper model described by s-parameters. This model is parameterized by the taper output width and the taper length which affects amplitude and phase of the output power. This data is provided in parameterized s-parameter format.
Note: For legacy data format (2022 R2.4 and older) please visit following link:
Waveguide Taper (Parameterized) - Lumfoundry Template (Legacy)
Template: ptaper_strip_c
Photonic Model: sparsweep_pcell
Quality Assurance Test: sparsweep_pcell QA
Supported Parameters: Taper output width, taper length.
Interoperability with Cadence Virtuoso:
- Circuit design flows using INTERCONNECT model: Yes.
- Circuit design flow using photonic Verilog-A model: Yes.
Modeling Data
The source data template for a simple waveguide element can be divided into two sections.
- For new users (continue with the following section: Basic data requirement)
- Advanced users ( continue with section: Complete Data Requirement )
The simple waveguide template can be used to create an advanced compact model for a custom simple waveguide. The template contains a lot of different modeling data to create an accurate model. However, not all these data need to be updated by users. The fastest and simplest way to modify the template data and create a custom compact model is to only update the data listed in the 'basic data requirement section' below, while all the remaining data (which are illustrated in detail in subsequent sections) can stay at their default value.
Note: Advanced users please jump start with Complete Data Requirement (for advanced users) section.
Basic data requirement (for new users)
The basic and minimum data required to build the simple waveguide model is described below.
general
"general" is a struct with the following fields:
Field | Type | Description |
---|---|---|
description | string | A string containing a brief description of the model, which will be displayed to the end user. |
notes | cell |
A cell array providing model notes which will be displayed to the end user. Each element of the cell is a struct with the fields:
|
ports
"ports" is a struct with the following fields:
Field | Type | Description |
---|---|---|
opt_X |
struct with fields described in table below | Port definition corresponding to the X th optical port. |
Each field above consists of the following fields:
Field | Type | Description |
---|---|---|
name | string | The name of the port, which will be visible to the end user. This name should be consistent with the name that will be used for netlisting. |
pos | string |
The side of the model which the port will be displayed on, either "Left", "Right", "Top", or "Bottom" |
order | number |
The order at which the port is listed in a netlist. |
parameters
"parameters" is a struct with the following fields:
Field | Type | Description |
---|---|---|
parameter_X | struct with the fields described in the table below |
parameter_X with X being an integer is a parameter that the user can arbitrarily define. For "temperature" to be defined as a parameter, only the following fields should be provided:
|
Each struct above consists of the following fields:
Field | Type | Description |
---|---|---|
name |
string |
Name of the parameter. |
kind | string |
The type of quantity described by this parameter. The values for this parameter correspond to the allowed values within the "Kind" dropdown menu within the Property Editor in INTERCONNECT. The "Kind" determines the units. Some example kinds are:
|
default |
number |
The nominal value of the parameter |
min
|
number |
Minimum allowed value if the visible_to_user is set to True. |
max
|
number |
Maximum allowed value if the visible_to_user is set to True. |
model_data
"model_data" is a struct with the following fields:
Field | Type | Description |
---|---|---|
mode_data |
Cell |
n x 1 cell array (n number of modes). Each element of the cell is a struct with fields:
|
spar_filename | String | A string containing the filename of the s-parameter data file for this element. This must include the extension of the file (.txt) |
S_parameters file | File |
A text file containing waveguide taper s-parameters in Optical N Port S-Parameter format (see "S-Parameter file sweep option"). The s-parameters must be defined for at least two frequency points. Note:
|
Complete data requirement (for advanced users)
The complete data section provide a complete reference of data supported by the simple waveguide model including the basic required data described in the previous section. The descriptions of all the fields in the simple waveguide source data template are described below.
general
"general" is a struct with the following fields:
[[snippet||11549514081811]]
ports
"ports" is a struct with the following fields:
[[snippet||12147423089811]]
Each field above consists of the following fields:
[[snippet||11549759363603]]
parameters
"parameters" is a struct with the following fields:
[[snippet||12188681692563]]
model_data
"model_data" is a struct with the following fields:
[[snippet||12147882417043]]
S_parameters file | File |
A text file containing waveguide taper s-parameters in Optical N Port S-Parameter format (see "S-Parameter file sweep option"). The s-parameters must be defined for at least two frequency points. Note:
|
QA
"QA" is a struct with the following fields:
[[snippet||12184428062739]]