3.5 THz quantum-cascade laser emission from dual diagonal feedhorns

被引：8

作者：

Ellison, B. N. ^{[1
]}

Valavanis, A. ^{[2
]}

Auriacombe, O. ^{[1
]}

Gerber, D. ^{[1
]}

Rawlings, T. ^{[1
]}

Brewster, N. ^{[1
]}

Oldfield, M. L. ^{[1
]}

Han, Y. ^{[2
]}

Li, L. H. ^{[2
]}

Zafar, E. ^{[2
]}

Linfield, E. H. ^{[2
]}

Davies, A. G. ^{[2
]}

Savini, G. ^{[3
]}

Emes, M. ^{[4
]}

Winter, B. ^{[4
]}

Walker, D. ^{[5
]}

Saenz, E. ^{[6
]}

机构：

[1] Rutherford Appleton Lab, STFC, Dept Space, Didcot, Oxon, England

[2] Univ Leeds, Sch Elect & Elect Engn, Leeds, W Yorkshire, England

[3] UCL, Dept Phys & Astron, London, England

[4] Univ Coll London, Mullard Space Sci Lab, Dorking, Surrey, England

[5] Univ Huddersfield, Sch Comp & Engn, Huddersfield, W Yorkshire, England

[6] European Space Agcy, Radio Frequency Payloads & Technol Div, Noordwijk, Netherlands

来源：

INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES | 2019年 / 11卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

Supra-terahertz; dual diagonal feedhorn; quantum-cascade laser; heterodyne; radiometer; earth observation;

D O I：

10.1017/S175907871900028X

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Antenna-pattern measurements obtained from a double-metal supra-terahertz-frequency (supra-THz) quantum cascade laser (QCL) are presented. The QCL is mounted within a mechanically micro-machined waveguide cavity containing dual diagonal feedhorns. Operating in continuous-wave mode at 3.5 THz, and at an ambient temperature of similar to 60 K, QCL emission has been directed via the feedhorns to a supra-THz detector mounted on a multi-axis linear scanner. Comparison of simulated and measured far-field antenna patterns shows an excellent degree of correlation between beamwidth (full-width-half-maximum) and sidelobe content and a very substantial improvement when compared with unmounted devices. Additionally, a single output has been used to successfully illuminate and demonstrate an optical breadboard arrangement associated with a future supra-THz Earth observation space-borne payload. Our novel device has therefore provided a valuable demonstration of the effectiveness of supra-THz diagonal feedhorns and QCL devices for future space-borne ultra-high-frequency Earth-observing heterodyne radiometers.

引用

页码：909 / 917

页数：9

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