Note: Development of a high resolution and wide band terahertz spectrometer based on a 1 μm-band external cavity diode laser

被引：5

作者：

Kitahara, K. ^{[1
]}

Oto, K. ^{[1
]}

Nakajima, M. ^{[1
]}

Muro, K. ^{[1
,2
]}

机构：

[1] Chiba Univ, Grad Sch Sci, Dept Phys, Inage Ku, Chiba 2638522, Japan

[2] Spectra Quest Lab Inc, Chiba 2600856, Japan

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2013年 / 84卷 / 12期

关键词：

WATER-VAPOR; SPECTROSCOPY; TEMPERATURE; SYSTEM; GENERATION; RADIATION;

D O I：

10.1063/1.4842275

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have developed a frequency-domain terahertz spectrometer based on homebuilt 1 mu m band external cavity diode lasers, for high resolution spectroscopy. Our spectrometer is digitally controlled to a resolution of 10 MHz, and uses InGaAs/GaAs photoconductive antennas. We have obtained a spectrum in the range 0.02 THz to 2.5 THz, which exceeds the conventional temperature tuning range of a distributed feedback diode laser. We achieved a signal-to-noise ratio of up to 80 dB at around 0.05 THz, and 20 dB at around 2.0 THz. We observed water vapor spectra in the atmosphere with a frequency step of 0.6 GHz in the region between 1.0 THz and 2.0 THz. We have demonstrated that our 1 mu m-band frequency-domain terahertz spectrometer is competitive when compared with existing 800 nm- and 1.5 mu m-band systems. (C) 2013 AIP Publishing LLC.

引用

页数：3

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