Improved circular polarizer for far‐infrared lightpipe systems
作者:
S. Wu,
S. G. Kaplan,
M. Quijada,
K. Sengupta,
H. D. Drew,
期刊:
Review of Scientific Instruments
(AIP Available online 1995)
卷期:
Volume 66,
issue 12
页码: 5559-5562
ISSN:0034-6748
年代: 1995
DOI:10.1063/1.1146084
出版商: AIP
数据来源: AIP
摘要:
We present an improved design for far‐infrared (FIR) circular polarizers used in a lightpipe transmission system for magneto‐optical experiments. A peak efficiency of nearly 100% is achieved for FIR laser radiation by reducing the multiple reflections within the polarizer system, as well as scattering from the walls of the lightpipe. Broadband low‐resolution measurements are less susceptible to errors due to multiple reflections, but incorporation of these improvements is still found to reduce systematic errors due to the reflection from the sample. Also, we have measured the low temperature index of refraction of quartz and find significant disagreement with published values for frequencies below 100 cm−1. ©1995 American Institute of Physics.
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