Two-stage EDFA With Midstage GEF
Description
Key performance characteristics of EDFAs such as high gain, low noise figure, high output power and gain flatness can be achieved in two-stage (or three-stage) amplifiers. The two-stage design provides capabilities to suppress ASE noise by the midstage optical isolator and ASE filter, which reduces amplifier saturation and positively contributes to the gain, power and noise characteristics. In such devices, the first stage can be viewed as a low-noise preamplifier, and the second stage as a power amplifier. High gain flatness of the amplifier is achieved by using a midstage Gain Equalization Filter (GEF).
Two-stage EDFA With Midstage GEF
Specifications |
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|---|---|
| Amplifier Type: | EDFA - Erbium-Doped Fiber Amplifier |
| Wavelength Range: | 1300-1480nm |
| Max Output Power: | 20 dBm |
| Nominal Gain: | 5 dB |
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Frequently Asked Questions
The optimization of the midstage GEF is achieved by using an iterative optimization algorithm that is applied to the hierarchical design. The algorithm is implemented to achieve a uniform channel power distribution, and the optimization goal is defined in terms of the maximum acceptable difference of the channel powers, which is set to 0.1 dB.
The two-stage design provides capabilities to suppress ASE noise by the midstage optical isolator and ASE filter, which reduces amplifier saturation and positively contributes to the gain, power, and noise characteristics. The high gain flatness of the amplifier is achieved by using a midstage Gain Equalization Filter (GEF).
Two-stage EDFA with Midstage GEF is a type of amplifier that provides high gain, low noise figure, high output power, and gain flatness in two-stage or three-stage amplifiers.
The simulation setup involves launching 40 WDM channels in the C-band with 100 GHz spacing and power level of -20 dBm into the first EDF section via an ideal wavelength-selective coupler. The first stage is forward-pumped with 80-mW power at 980 nm, and the second stage is pumped by 200 mW at 1480 nm to provide a better conversion efficiency.
You can find more information about Two-stage EDFA with Midstage GEF on the VPIcomponentMaker Fiber Optics and on the VPIphotonics Forum.