锤子
A laser system utilising the method of synchronous pumping of a Ti : sapphire laser by a high-power femtosecond Yb3+- doped laser is described. The pulse repetition rate of the Ti : sapphire laser is successfully locked to the repetition rate of the Yb laser for more than 6 hours without the use of any additional electronics. The measured timing jitter is show to be less than 1 fs. A simple qualitative model addressing the synchronisation mechanism utilising the сross-phase modulation of oscillation and pump pulses within a Ti : sapphire active medium is proposed. Output parameters of the Ti : sapphire laser as functions of its cavity length are discussed in terms of this model.
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