Polarization-maintaining amplification of phase modulated pulse employing ytterbium-doped single-mode fiber amplifier

摘要

Polarization-maintaining fiber amplifier using ytterbium-doped single-mode fiber (SMF) is pro-posed. A 45° Faraday rotator mirror (FRM) and a polarization independent fiber loop circulator (FLC) with polarization- maintaining fiber (PMF) pigtails are used to realize double-pass amplification and birefringence self-compensation. Arbitrary state of polarization (SOP) such as the linear polarization and elliptical polarization can be maintained. Polarization-maintaining amplification of phase modulated pulse with this amplifier is experimentally demonstrated while introducing little intensity modulation itself.