Single pixel sensing for THz laser beam profiler based on Hadamard Transform

被引：30

作者：

Vasile, T. ^{[1
]}

Damian, V. ^{[1
]}

Coltuc, D. ^{[2
]}

Petrovici, M. ^{[2
]}

机构：

[1] Natl Inst Laser Plasma & Radiat Phys, POB MG 36, RO-077125 Bucharest, Romania

[2] Univ Politeh Bucharest, Dept Appl Elect & Informat Technol, Bucharest, Romania

来源：

OPTICS AND LASER TECHNOLOGY | 2016年 / 79卷

关键词：

THz laser; Spatial light modulator; Beam profile; Hadamard transform;

D O I：

10.1016/j.optlastec.2015.12.009

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present our experimental set-up and results for a THz beam profiling system based on a mechanical spatial light modulator (SLM) for one pixel sensing. By placing a synthetic aperture into the path of a propagating THz beam we achieved the optical ON/OFF keying of its various intensity components. Further, by successively expose a series of predesigned binary masks we manage to encode within their features the beam spatial distribution. The masks used are of a predefined size and can be designed for different resolutions. Our approach eliminates the need of using an array of pixels for detection while still maintaining the high sensitivity and dynamic range of one detector. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：173 / 178

页数：6

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