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首页> 外文期刊>Optics Letters >All-optical phase locking of two femtosecond Ti:sapphire lasers: a passive coupling mechanism beyond the slowly varying amplitude approximation
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All-optical phase locking of two femtosecond Ti:sapphire lasers: a passive coupling mechanism beyond the slowly varying amplitude approximation

机译：两个飞秒Ti：蓝宝石激光器的全光锁相：超越缓慢变化幅度近似的无源耦合机制

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摘要

Two independently tunable femtosecond Ti:sapphire lasers are passively synchronized with a stable relative carrier-envelope offset phase. By heterodyning the spectral overlap of the two frequency combs, we observe multiple regimes for the cavity length difference in which the relative round-trip phase slip is effectively locked to zero. The strong correlation of the femtosecond pulse trains is maintained over minutes with-out any external stabilization, and relative cavity length variations of 50 nm are compensated. The phase synchronization relies on phase-dependent cross-phase modulation, taking full advantage of the nonresonant optical nonlinearity of the shared gain medium, which is much faster than the optical cycle.
机译：两个独立可调的飞秒Ti：蓝宝石激光器以稳定的相对载流子-信封偏移相位进行被动同步。通过外差两个频率梳的频谱重叠，我们观察了腔长差的多种机制，其中相对往返相位滑动有效地锁定为零。飞秒脉冲序列的强相关性可在数分钟内保持，没有任何外部稳定性，并且补偿了50 nm的相对腔长变化。相位同步依赖于相位相关的交叉相位调制，充分利用了共享增益介质的非谐振光学非线性，该非线性比光学周期快得多。

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