xref: /gem5/ext/dsent/tech/tech_models/Photonics.model

# This file contains the model for photonic devices/circuits
PhotonicsName = Photonics

# ALL PARAMETERS IN SI UNITS!!! (J, W, m, F, dB, A)

# -----------------------------------------------------------------------------
# Waveguide
# -----------------------------------------------------------------------------
Waveguide->LossPerMeter                     = 100       # dB/m
Waveguide->Pitch                            = 4e-6      # m
Splitter->Loss                              = 1.00      # dB
Coupler->Loss                               = 1.00      # dB

# -----------------------------------------------------------------------------
# Laser
# -----------------------------------------------------------------------------

# Continuous wave off-chip (always on) laser
Laser->CW->Efficiency                       = 0.25      # P_Laser/P_Electrical
Laser->CW->LaserDiodeLoss                   = 1.00      # Laser diode loss
Laser->CW->Area                             = 0

# Gated on-chip (data-dependent) laser
Laser->GatedCW->Efficiency                  = 0.25      # P_Laser/P_Electrical
Laser->GatedCW->LaserDiodeLoss              = 1.00      # Laser diode loss
Laser->GatedCW->Area                        = 200e-12

# -----------------------------------------------------------------------------
# Modulators
# -----------------------------------------------------------------------------
# Ring Modulator
Modulator->Ring->SupplyBoostRatio           = 1.2       # Boost the supply voltage above required reverse bias voltage by this ratio
Modulator->Ring->ParasiticRes               = 100       # ohm
Modulator->Ring->ParasiticCap               = 5e-15     # F
Modulator->Ring->FCPDEffect                 = 3e-27     # Free carrier plasma dispersion effect, delta_n/delta_c (m^-3)
Modulator->Ring->Tn                         = 0.01      # Transmisivity at the bottom of the notch
Modulator->Ring->NA                         = 3e24      # m^3, p doping
Modulator->Ring->ND                         = 1e24      # m^3, n doping
Modulator->Ring->ni                         = 1e16      # m^3, intrinsic free carriers
Modulator->Ring->JunctionRatio              = 0.8       # Junction ratio to total optical length
Modulator->Ring->Height                     = 500e-9    # Height of the junction (m)
Modulator->Ring->Width                      = 500e-9    # Modulator width (m)
Modulator->Ring->ConfinementFactor          = 0.3       # Modulator confinement factor

# -----------------------------------------------------------------------------
# Ring Resonator
# -----------------------------------------------------------------------------
Ring->Area                                  = 100e-12   # m2
Ring->Lambda                                = 1300e-9   # Resonant wavelength range
Ring->GroupIndex                            = 4         # Group index
Ring->Radius                                = 3e-6      # Bend radius of the ring
Ring->ConfinementFactor                     = 0.3       # Confinement factor
Ring->ThroughLoss                           = 0.01     	# [dB]
Ring->DropLoss                              = 1.0       # [dB]
Ring->MaxQualityFactor                      = 150e3     # Maximum quality factor
Ring->HeatingEfficiency                     = 100000    # Ring heating efficiency [K/W]
Ring->TuningEfficiency                      = 10e9      # Ring tuning efficiency [Hz/K]
Ring->LocalVariationSigma                   = 40e9      # Ring resonance frequency local mismatch sigma [Hz]
Ring->SystematicVariationSigma              = 200e9     # Ring resonance frequency systematic mismatch sigma [Hz]
Ring->TemperatureMax                        = 380       # Maximum temperature that the tuning mechanism must still be able to work at [K]
Ring->TemperatureMin                        = 280       # Minimum temperature that the tuning mechanism must still be able to work at [K]
Ring->MaxElectricallyTunableFreq            = 50e9      # Maximum electrically tunable range when allowing for electrically assisted tuning [Hz]

# -----------------------------------------------------------------------------
# Photodetector
# -----------------------------------------------------------------------------
Photodetector->Responsivity                 = 1.1           #(A/W)
Photodetector->Area                         = 10e-12        # m2
Photodetector->Cap                          = 0             # F
Photodetector->ParasiticCap                 = 5e-15         # F
Photodetector->Loss                         = 1.00          # dB
Photodetector->MinExtinctionRatio           = 3             # dB
Photodetector->AvalancheGain                = 1             # avalanche gain

# -----------------------------------------------------------------------------
# Receivers
# -----------------------------------------------------------------------------

# Sense amplifier (common to all receivers)
SenseAmp->BER                               = 1e-15     # Target bit error rate
SenseAmp->CMRR                              = 5         # Common-mode rejection ratio
SenseAmp->OffsetCompensationBits            = 5         # Number of bits used for fine-tuning offset compensation
SenseAmp->OffsetRatio                       = 0.04      # Offset mismatch (as a fraction of VDD)
SenseAmp->SupplyNoiseRandRatio              = 0.01      # Random supply noise (as a fraction VDD)
SenseAmp->SupplyNoiseDetRatio               = 0.05      # Deterministic supply noise (as a fraction VDD)
SenseAmp->NoiseMargin                       = 0.02      # Extra noise margin
SenseAmp->JitterRatio                       = 0.01      # Jitter (as a fraction of Tbit)

Receiver->Int->IntegrationTimeRatio         = 0.7       # Integration time (as a fraction of Tbit)