研究了一种由表面镀铝的磷青铜作为反射面的矩形型波导传输紫外光束的性能。实验结果表明,这种波导能够有效地传输308nm紫外光束,传输率可达72%/m。充入氦气能有效地提高紫外光束的传输率。并对于不同弯曲程度对波导损耗的影响以及如何提高波导传输率,降低弯曲损耗进行了分析。

A hollow light guideusing the aluminum-phosphor bronze reflector to transmit UV laser beams has been studied.The delivery characteristics of the hollow light guide with different bending angle havebeen studied using XeCl excimer laser. The transmission of straight light guide was 72%/mand the transmission of bending wave guide of different radius of curvature have also beenmeasured. The measurement showed that the transmission was proportional inversely to thebending radius R. Some methods to improve the transmission have been proposed. Theexperiment showed that helium gas displayed the weakest absorption and can improve thetransmittance of hollow light guide. When the light beams with very small divergencepropagate as whispering gallery modes, which propagate through the guide by successivereflections from the outer wall only , the transmission is independent of the curvature R.