Timing jitter measurement with 8.49 zs/√ sensitivity based on a delayed self-heterodyne method

【摘要】 Precise timing jitter characterization is crucial for the advancement of ultrafast lasers and their applications.While the balanced optical cross-correlation method is routinely used,a self-heterodyne method with fiber delay provides a practical alternative without the need for a reference oscillator.Here,the timing detection noise floor of this method has been reduced to 8.49 zs/√,corresponding to a measurement resolution of 8.41 as within a 1 MHz bandwidth.The impact of environmental noise and fiber length on measurement sensitivity has been studied by characterizing a commercial low-noise femtosecond laser.This setup is particularly suitable for attosecond jitter measurements in timing synchronization and distribution applications.更多还原

【Abstract】 Precise timing jitter characterization is crucial for the advancement of ultrafast lasers and their applications.While the balanced optical cross-correlation method is routinely used,a self-heterodyne method with fiber delay provides a practical alternative without the need for a reference oscillator.Here,the timing detection noise floor of this method has been reduced to 8.49 zs/√,corresponding to a measurement resolution of 8.41 as within a 1 MHz bandwidth.The impact of environmental noise and fiber length on measurement sensitivity has been studied by characterizing a commercial low-noise femtosecond laser.This setup is particularly suitable for attosecond jitter measurements in timing synchronization and distribution applications.更多还原