A statistically enabled thermo-optic phase shifter model, which can be tuned to match insertion loss and thermal modulation efficiency with respect to power.
The statistical parameters are delta_width, delta_height, delta_ridge_height, delta_Ppi, and delta_IL.
For information on statistical CMLs, see Statistical CMLs.
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Thermal Phase Shifter (Statistical) - Lumfoundry Template
Template: ps_thermal_stat_te_c
Photonic Model: phase_shifter_thermal
Quality Assurance Test: phase_shifter_thermal QA
Parameters: phase shifter length
Virtuoso/Verilog-A Support: Yes (no statistical modeling)
Required Data
Parameter Script File
[[snippet||7200165531283]]
QA Variables
[[snippet||7200321024787]]
Statistical QA Variables (statistical compact models only)
[[snippet||7201252337683]]
Data File
Nominal Data
[[snippet||7200909471891]]
Statistical Data (optional)
This data is required for CML Compiler to enable statistical modeling. Note that to allow CML Compiler to build statistically enabled models, the statistical_parameter_status has to be defined in the XML file. For more information, see Statistical CMLs.
Variable | Type | Description |
---|---|---|
stat_parameters |
Cell |
A cell of length N containing the statistical data for the ring modulator where N is the number of statistical parameters. Each entry in the cell is a struct with the following fields. |
stat_parameters{i}.name |
string |
Name of the i-th statistical parameter. |
stat_parameters{i}.mean |
Number |
Mean value of the i-th statistical parameter. |
stat_parameters{i}.corners |
Matrix |
Corner values for the i-th statistical parameter provides as an Cx1 matrix where C is the number of process corners defined in the XML file. Note: The values for the process corners should follow the same order as in the XML file. |
stat_parameters{i}.slope_neff |
Number
|
The sensitivity of the effective index of the waveguide with respect to the i-th statistical parameter defined as d_neff / d_stat_parameters{i}. Note: Only provide this field if the statistical parameter affects the effective index (see ps_thermal_stat_te_c). |
stat_parameters{i}.slope_ng |
The sensitivity of the group index of the waveguide with respect to the i-th statistical parameter defined as d_ng / d_stat_parameters{i}. Note: Only provide this field if the statistical parameter affects the group index (see ps_thermal_stat_te_c). |
|
stat_parameters{i}.slope_Ppi |
The sensitivity of the Ppi (W) of the thermal phase shifter with respect to the i-th statistical parameter defined as d_Ppi / d_stat_parameters{i}. Note: Only provide this field if the statistical parameter affects the Ppi (see ps_thermal_stat_te_c). |
|
stat_parameters{i}.slope_IL |
The sensitivity of the insertion loss (dB) of the thermal phase shifter with respect to the i-th statistical parameter defined as d_IL / d_stat_parameters{i}. Note: Only provide this field if the statistical parameter affects the insertion loss (see ps_thermal_stat_te_c). |
|
stat_parameters{i}.LOCAL |
struct
|
A struct describing the LOCAL level variation of the i-th statistical parameter with the following fields: distribution = Defines the type of the PDF used to describe the LOCALlevel variation. Currently the options are 'normal' (Gaussian) or 'pearson4' (Non-Gaussian). sigma = The standard deviation of the LOCALlevel variation. gamma1: The skewness of the LOCALlevel variation (for pearson4 distribution only) beta2: The kurtosis of the LOCALlevel variation (for pearson4 distribution only) |
stat_parameters{i}.GLOBAL |
A struct containing the GLOBAL level variation of the i-th statistical parameter with the following fields: distribution = Defines the type of the PDF used to describe the GLOBAL level variation. Currently the options are 'normal' (Gaussian) or 'pearson4' (Non-Gaussian). sigma = The standard deviation of the GLOBAL level variation. gamma1: The skewness of the GLOBAL level variation (for pearson4 distribution only) beta2: The kurtosis of the GLOBAL level variation (for pearson4 distribution only) GLOBALGROUP : Name of the GLOBALGROUP defined in the top level XML file. (if a GLOBALGROUP is provided then the description in the XML file takes priority over the data file) Note: It is optional to provide a GLOBAL level variation for statistical parameters. |