A 4-Ghz Actively Driven Ultra-Low Phase Noise Mode-Locked Fibre Laser

Abstract

This work demonstrates an actively driven ultra-low phase noise mode-locked laser built with all polarization-maintaining components. The output of the laser is an optical pulse train at 4-GHz repetition rate and 1.63-ps pulse width. The absolute phase noise and timing jitter of the photo detected signal is measured and found to be -140 dBc/Hz at 10-kHz offset frequency and 10.21 fs (integrated from 100 Hz to 10 MHz). This work demonstrates an actively driven ultra-low phase noise mode-locked laser built with all polarization-maintaining components. The output of the laser is an optical pulse train at 4-GHz repetition rate and 1.63-ps pulse width. The absolute phase noise and timing jitter of the photo detected signal is measured and found to be -140 dBc/Hz at 10-kHz offset frequency and 10.21 fs (integrated from 100 Hz to 10 MHz). image