C- and L-Band Parallel Configuration Optical Fiber Amplifier Employing Bundled Er³⁺-Doped Fiber

Abstract

We propose a new configuration for a parallel fiber amplifier that can amplify both the C- and L-bands simultaneously by employing bundled Er³⁺-doped fiber (EDF). The bundled EDF is a candidate amplification medium for multi-core optical fiber amplifiers. Our parallel fiber amplifier is another application of the multi-core amplification medium. The amplifier achieves almost the same signal gain of 20dB for both the C- and L-bands by using a bundled EDF, which is realized by bundling seven identical single-core EDFs.