directional_coupler_parameterized data file

number

Center wavelength (m) of the band for which all waveguide properties are calculated.

Cell

M x 1 cell array, where M is the number of modes. Each element of the cell is a struct with fields:

• name: string with the name of the mode ('TE' or 'TM')
• ID: integer to identify the mode, which should be 1 for 'TE' and 2 for 'TM'. These should be consistent across the entire CML.

Note: This model only supports one or two modes.

Matrix

M x 1 matrix with the effective index for the wavelength and modes specified above.

M x 1 matrix with the group index for the wavelength and modes specified above.

M x 1 matrix with the dispersion (s/m/m) for the wavelength and modes specified above.

M x 1 matrix with the waveguide loss (dB/m) for the wavelength and modes specified above.

Notes:

• This is used to calculate propogation loss in the waveguides, not loss due to coupling. Coupling losses are captured by the data in the Additional Loss section.
• This must be a positive number.

G x 1 matrix containing the coupling gaps for which the values in couplercoeff correspond, where G is the number of coupling gaps provided.

M x G x 2 x 2 matrix containing the coupling coefficients of the directional coupler, where M is the number of modes, and G is the number of coupling gaps.

For more detail on how this is used, see the Cross Coupled Power in photonic model page.

Number

Minimum wavelength (m) for which couplercoeff is valid.

Maximum wavelength (m) for which couplercoeff is valid.

Length (m) of each of the four bent arms.

Note: This model assumes that all the arms have the same length. The total length of each waveguide is given by \(2L_{bend} + L_{coupling}\)

Default value of the coupling gap (m)

Note: This value is visible to the end user.

Minimum value of coupling gap (m)

Note: This value is visible to the end user.

Maximum value of coupling gap (m)

Note: This value is visible to the end user.

Default value of the coupling length (m)

Note: This value is visible to the end user.

Minimum coupling length (m)

Note: This value is visible to the end user.

Maximum coupling length (m)

Note: This value is visible to the end user.

Matrix

F x 1 matrix containing the wavelengths (m) for which the additional loss in addloss is evaluated, where F is the number of wavelengths for which data is provided.

F x M matrix containing the additional loss (dB) associated with the coupling of different wavelengths and modes, where F is the number of wavelengths, and M is the number of modes.

For more detail on how this is used, see Cross Coupled Power in photonic model page