SRS Loss and Tilt Calculator

SRS Loss and Tilt Calculator

Power in C-band:

mW

dB

Power in L-band:

mW

dB

Fiber Attenuation α (default 0.2 dB/km): Fiber Type (κ value):

G.652.D - κ=1

G.655.A-D (LEAF) - κ=1.12

G.655.C,D (Truewave RS) - κ=1.45

G.656 (Truewave REACH) - κ=1.54

Results:

Total System Power: 100 / 20

SRS Loss (C-band): 0.56

SRS Loss (L-band): 0.34

SRS Tilt: 0.56

Formula and Explanation

SRS Tilt Calculation:

The tilt due to Stimulated Raman Scattering (SRS) between C and L bands is calculated as:

SRS-tilt_C/L = (ξ * κ * 0.22 / α) * (P_C + P_L) * 0.01

ξ - Interaction coefficient, typically 0.9
κ - Fiber type coefficient, which varies depending on the fiber type selected
α - Fiber attenuation, usually given in dB/km
P_C and P_L - Power in the C-band and L-band, respectively

SRS Loss Calculation for C and L Bands:

SRS-loss_C = χ_C * κ * θ_C * U_C * (0.22 / α) * (P_C + P_L) * η_C / 100

χ_C - Proportion constant for C-band, typically 0.8 for C-band
κ - Fiber type coefficient, matching the fiber type
θ_C - Depends on channel population in the C-band
U_C - Uniformity index for C-band channels
η_C - Efficiency factor based on power distribution across bands