论文标题
地球重力对半球腔中高斯束传播的影响
Impact of Earth's gravity on Gaussian beam propagation in hemispherical cavities
论文作者
论文摘要
从理论上讲，我们研究了在地球上运行的半球光腔中重力对激光的影响。这种空腔中光的传播由高斯梁建模，受地球的重力场影响。在实验室规模上，该领域由同质重力的时空描述，称为Rindler Spacetime。在那个时空中，梁向下弯曲并获得了依赖高度的相移。结果，激光灯的相位正面与通常的高斯光束不同。假设初始光束沿其对称轴进入腔体，则这些引力效应会在每个腔体往返时会导致梁相的变化。进行详细的计算以研究这些相变的如何依赖于光束参数和空腔设置。此外，我们讨论了我们发现对腔体校准技术和基于腔激光稳定程序的含义。
We theoretically investigate the influence of gravity on laser light in a hemispherical optical cavity, operating on Earth. The propagation of light in such a cavity is modeled by a Gaussian beam, affected by the Earth's gravitational field. On laboratory scale, this field is described by the spacetime of homogeneous gravity, known as Rindler spacetime. In that spacetime, the beam is bent downwards and acquires a height dependent phase shift. As a consequence the phase fronts of the laser light differ from those of a usual Gaussian beam. Assuming that the initial beam enters the cavity along its symmetry axis, these gravitational effects cause variations of the beam phase with every cavity round trip. Detailed calculations are performed to investigate how these phase variations depend on the beam parameters and the cavity setup. Moreover, we discuss the implications of our findings for cavity calibration techniques and cavity-based laser stabilization procedures.
