EDFA-TDFA hybrid amplifier

Dear Krishna,
You could find the equations for NF calculation in the datasheet of the Dual port WDM Analyzer as shown in the attached file.
regards,
Ahmad

Thank you so much Sir for your response.

Sir I am getting this values from WDM analyzer at a particular wavelength in EDFA

Wavelength (1492 nm) Gain (15.4596 dB) Noise Figure (5.6398562 dB) Input Signal (-50.002673 dBm) Input Signal (9.99E-09 W) Input Noise (-100 dBm) Input Noise (0 W) Input SNR (49.997327 dB) Input Noise 0.1nm(-100 dBm) Input Noise 0.1nm(0 W) Input OSNR (49.997327 dB) Output Signal (-34.543073 dBm) Output Signal (3.51E-07 W) Output Noise (-36.722209 dBm) Output Noise (2.13E-07 W) Output SNR (2.1791354 dB) Output Noise 0.1nm(-36.722209 dBm) Output Noise 0.1nm(2.13E-07 W) Output OSNR (2.1791354 dB)

So, according to the values NF should be OSNR(input)-OSNR(output)= 49.997327 dB – 2.1791354 dB = 47.8182 dB. But noise figure shown by WDM analyzer is 5.63 dB.
I want to know which formula is used here to calculate the noise figure..

Dear Krishna,
you use OSNR(input)-OSNR(output) only when the noise source is external, which doesn’t apply here. The noise is coming from the doped fibers. So, you need to use the formula as described in the image I’ve sent you earlier.
regards,
Ahmad