Ozharar, S.Ozdur, I.2021-05-202021-05-2020181842-65732065-3824https://hdl.handle.net/20.500.12573/723This work is supported by The Scientific and Technological Research Council of Turkey (TUBITAK) project number 115F468.In this work, we have designed and experimentally characterized the absolute phase noise of a fiber coupled semiconductor ring laser at 1550 nm, actively mode-locked at 10 GHz by an external RF oscillator. The dependency of mode-locked laser phase noise to the external RF oscillator phase noise and laser cavity length is investigated using different RF sources and cavity lengths. A timing jitter of 14.6 fs (1 kHz to 1 MHz) has been measured at 10 GHz with a total cavity length of 315 meters.enginfo:eu-repo/semantics/closedAccessSemiconductor laserPhase noiseMode-locked laserarticleVolume: 12 Issue: 3-4 Pages: 133-136