A new technique has been proposed and demonstrated for measuring the pulse-timing fluctuations of mode-locked lasers at low Fourier frequencies. The time interval between the laser pulses is precisely measured by use of zero-dead-time counters referenced to a stable atomic oscillator. By combination of this method with the time-domain demodulation technique, the phase-noise power spectral density of a mode-locked Cr:LiSAF laser has been estimated for the 1-mHz–1-MHz Fourier frequency range, with a 240-dB dynamic range.
© 1999 Optical Society of America
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.4050) Lasers and laser optics : Mode-locked lasers
(140.7090) Lasers and laser optics : Ultrafast lasers
(320.7090) Ultrafast optics : Ultrafast lasers
Hidemi Tsuchida, "Time-interval analysis of laser-pulse-timing fluctuations," Opt. Lett. 24, 1434-1436 (1999)