Compact high-isolation polarization-independent optical circulator: characteristic analysis and experiment

摘要

This paper presents a novel optical circulator configuration which only employs Faraday rotators to complete light polarization plane's rotation. By using Jones matrices, the insertion los and isolation are evaluated. The result show that the isolation is obviously increasing with an increase of the rotation errors of the rotators. A 3-port circulator has been fabricated and achieved an insertion loss lower than 0.8dB and an isolation over 45dB.