Comparison of the noise performance in erbium- And praseodymium-doped fiber amplifiers

Document Type

Conference Proceeding

Date of Original Version



The erbium-doped fiber amplifier (EDFA) operating at 1.5μm wavelength and the praseodymium-doped fiber amplifier (PDFA) at 1.3μm wavelength are promising components for optical fiber communications due to their high gain, high saturation powers, low noise and low crosstalk. In this paper, using a comprehensive model which takes into account the spectroscopic properties of the fiber amplifiers, we have analyzed the noise performance in EDFAs and PDFAs under different operating conditions. We found that the noise figures (NF) is strongly signal wavelength dependent due to lower population inversion in EDFAs for 1.48μm pumping and due to ground state absorption (GSA) in PDFAs. Outside of the GSA wavelengths, the noise performance of the PDFA is comparable with that of EDFA pumped in 0.98μm band. We have confirmed that the NF is independent of numerical aperture (NA) for both amplifiers. The improvement in noise performance due to the addition of an inline isolator and an optical fiber filter has also been studied.

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering