Towards versatile coherent pulse synthesis using femtosecond laser and optical parametric oscillators.
Pulses from a tunable near-infrared femtosecond optical parametric oscillator and its Ti:sapphire pump laser were phase-locked by matching their carrier-envelope phase-slip frequencies to one quarter of their common pulse repetition frequency. Interferometric second-order cross-correlation and spectral interferometry traces demonstrated their mutual coherence for periods of at least 20 ms, compared with individual coherence times of 0.1 ms estimated from their phase-noise power spectra. This result is a prerequisite for versatile coherent pulse synthesis. Implications for the synthesis of arbitrary waveforms from multi-colour pulses are discussed.
Ultrafast Optics Group, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh. bjsg1@hw.ac.uk
B J S
BJ
Gale
J H
JH
Sun
D T
DT
Reid
D000537:Aluminum Oxide; D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D009991:Oscillometry / Q000295:instrumentation* / Q000379:methods; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D041623:Tomography, Optical Coherence / Q000295:instrumentation* / Q000379:methods
D000537:Aluminum Oxide