Optical fiber-coupled InGaAs-based terahertz time-domain spectroscopy system

被引：28

作者：

Han, Sang-Pil ^{[1
]}

Ko, Hyunsung ^{[1
]}

Kim, Namje ^{[1
]}

Ryu, Han-Cheol ^{[1
]}

Lee, Chul Wook ^{[1
]}

Leem, Young Ahn ^{[1
]}

Lee, Donghun ^{[1
]}

Jeon, Min Yong ^{[2
]}

Noh, Sam Kyu ^{[3
]}

Chun, Hyang Sook ^{[4
]}

Park, Kyung Hyun ^{[1
]}

机构：

[1] ETRI, THz Photon Creat Res Ctr, Taejon 305700, South Korea

[2] Chungnam Natl Univ, Dept Phys, Taejon 305764, South Korea

[3] KRISS, Global Res Lab, Nano Mat Evaluat Ctr, Taejon 305340, South Korea

[4] Korea Food Res Inst, Food Safety Res Div, Songnam 463746, South Korea

来源：

OPTICS LETTERS | 2011年 / 36卷 / 16期

基金：

新加坡国家研究基金会;

关键词：

SPECTROMETER; PHOTOMIXERS; GENERATION; ANTENNAS; LASER; HEAD;

D O I：

10.1364/OL.36.003094

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The successful demonstration of an optical fiber-coupled terahertz time-domain spectroscopy (THz-TDS) system is described in this study. The terahertz output power of the emitter with two optical band rejection filters was 132 nW, which is an improvement of 70% over the output power without any filters. This improvement is due to the suppression of an optical modulated signal that is reverse-generated when an alternating current bias exceeding a certain threshold is applied to the emitter. Under the optimal alignment conditions, the terahertz detector in a fiber-coupled THz-TDS system clearly measured water vapor dips in the free space. (C) 2011 Optical Society of America

引用

页码：3094 / 3096

页数：3

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