Dielectrically embedded mesh half wave plate beam impact studies
Dielectrically embedded mesh half wave plate beam impact studies
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电介质嵌入式网状半波片光束冲击研究
DOI：
10.1117/12.926683
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Maffei B
中科院分区：
文献类型：
--
作者：
Maffei B
基于光刻技术的经典双折射半波片(HWP)的另一种解决方案最近被开发出来。这种新的器件可以为未来的CMB偏振仪器提供一个非常好的偏振调制器。然而，这个高水头方案将在整个工具中引入的系统影响需要进行调查。我们提出了一个初步研究这种介质嵌入HWP对波纹喇叭的波束形状和横跨波束的性能的影响。利用W波段矢量网络分析仪，测量了HWP-喇叭系统的共极化光束和交叉极化光束，以及HWP在光束上引入的微分相移。
An alternative solution to classic birefringent Half Wave Plates (HWP), based on the photolithographic techniques, has been recently developed. This new device can offer a very good alternative as a polarisation modulator for future CMB polarisation instruments. However, the systematic effects that this HWP will introduce in the overall instrument need to be investigated. We present a preliminary study of the impact of this dielectrically embedded HWP on the beam shape of a corrugated horn and its performance across the beam. Using a W-band Vector Network Analyser, we measured the co- and crosspolarisation beams of the HWP-horn system and the differential phase-shift introduced by the HWP across the beam.