EDFA Fiber Optical Amplifier Gain Calculator

Optical Amplification Physics: Calculate small-signal and saturated gain ($G$), amplified spontaneous emission ($P_{ASE}$), and Noise Figure ($NF$).

Small-Signal Gain $G_0$ (dB):

Input Signal Power $P_{in}$ (dBm):

Saturation Power $P_{sat}$ (dBm):

Inversion Factor $n_{sp}$:

ASE Optical Bandwidth $\Delta\lambda$ (nm):

Saturated Gain ($G$)

-- dB

Compression: -- dB

Output Signal Power ($P_{out}$)

-- dBm

In milliwatts: -- mW

Noise Figure ($NF$)

-- dB

Quantum limit: 3.0 dB

ASE Noise Power ($P_{ASE}$)

-- dBm

Optical SNR: -- dB

EDFA Mechanics:

• High input signals saturate population inversion, compressing gain: $G_{dB} \approx \frac{G_{0,dB}}{1 + P_{out} / P_{sat}}$.

• Amplified Spontaneous Emission (ASE) noise: $P_{ASE} = 2 n_{sp} (G - 1) h \nu \Delta\nu$. Fundamental quantum limit is $NF \ge 3$ dB.

Recommended Tools & Equipment

Tested hardware and components for high reliability

100% Free Tool Zero Sign-Up