Speaker
Description
We present a four-mirror bowtie-type continuous-wave optical enhancement cavity capable of sustaining an average intracavity power exceeding 1 megawatt at a wavelength of 1064 nm for several minutes. The experiment achieved a maximum intracavity power of 1.15 MW, while the intracavity beam maintained a pure fundamental Gaussian lateral mode with an effective enhancement factor exceeding 9,000. We focus on the measurement and study of power stability, transverse mode shape, and phase noise levels of intracavity beam, as well as the thermal effects of the optical cavity, and discuss directions for improving high-power optical cavities. These results lay a solid foundation for future applications, such as steady-state microbunching extreme ultraviolet light sources and photo-neutralization systems in fusion reactor facilities.
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