, Volume 80, Issue 2, pp 185-192
Date: 08 Dec 2004

Relative timing jitter measurements with an indirect phase comparison method

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


We propose and demonstrate experimentally a method for the sensitive measurement of the relative timing jitter of two mode-locked lasers, which can be either free-running or timing-synchronized to a common reference oscillator. The method is based on the indirect comparison of the phases of two photodetector outputs, using a microwave oscillator, the noise of which does not affect the results, electronic mixers, and a sampling oscilloscope. We carefully analyze and experimentally demonstrate the potential of this method. Compared to phase detector methods, it has a broader scope of applications and a lower sensitivity to intensity noise. We also obtained data on the coupling of intensity to timing noise in photodetectors.


42.50.Lc; 42.60.Fc