Intensity detection of terahertz quantum cascade laser radiation using electro-optic sampling

被引：9

作者：

Rungsawang, R. ^{[1
]}

Marshall, O. ^{[1
]}

Freeman, J. R. ^{[1
]}

Beere, H. E. ^{[1
]}

Malik, S. ^{[2
]}

Alton, J. ^{[2
]}

Barbieri, S. ^{[3
]}

Ritchie, D. A. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Teraview Ltd, Cambridge CB4 0WS, England

[3] Univ Paris 07, F-75205 Paris 13, France

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 19期

基金：

英国工程与自然科学研究理事会;

关键词：

birefringence; cadmium compounds; electro-optical effects; fibre lasers; high-speed optical techniques; II-VI semiconductors; quantum cascade lasers; submillimetre wave lasers;

D O I：

10.1063/1.3027474

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate intensity detection of terahertz radiation from a 2 THz quantum cascade laser with nonsynchronized electro-optic (EO) sampling under crossed polarizers. The detection sensitivity is limited by the residual birefringence of the EO detection crystal. With 100 fs fiber laser pulses and a CdTe EO crystal, terahertz radiation with power less than 100 mu W was detected. A femtosecond gating pulse provides an ultrashort detection response that is potentially very useful for analyzing temporal performance of short pulsed radiation or observing fast phenomena probed by terahertz pulses.

引用

页数：3

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