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We demonstrate the highly precise active-synchronization between two independent Ti: sapphire femtosecond oscillators. A combination of three phase locked loops, is used to control the synchronization between two laser pulses,which gives a RMS timing jitter less than 30fs. With the technique of cavity length monitoring and autocontrol by a computer,this highly precise synchronization can be retained for more than 40 minutes.
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Keywords:
- femotosecond laser /
- active synchronization /
- phase locked loop /
- timing jitter
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