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Coherent addition of laser beams in resonant passive optical cavities

机译:在谐振无源光学腔中相干添加激光束

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摘要

An optical resonator, designed for frequency doubling of cw single-frequency radiation, is simultaneously injected by two phase-coherent laser beams with the same frequency. By using standard methods in laser-cavity stabilization, we are able to stabilize the cavity length on resonance with the laser, as well as the relative phase of the fundamental beams, to fulfill the optimum coupling conditions simultaneously on the two input couplers. By using this method, we generate reliably more than 220 mW of single-frequency radiation at 399 nm using two 0.5 W semiconductor tapered amplifiers at 798 nm. This method can be generalized to a larger number of input couplers and holds promise for improving the performances of extreme-UV frequency combs.
机译:一个设计用于连续波单频辐射频率加倍的光学谐振器同时由两个具有相同频率的相位相干激光束注入。通过在激光腔稳定中使用标准方法,我们能够稳定与激光共振时的腔长以及基本光束的相对相位,从而在两个输入耦合器上同时满足最佳耦合条件。通过使用这种方法,我们使用两个波长为798 nm的0.5 W半导体锥形放大器可靠地在399 nm处产生了220 mW以上的单频辐射。该方法可以推广到更多的输入耦合器,并有望改善极端UV频率梳的性能。

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