A time-domain terahertz spectrometer with 90 dB dynamic range

Author

Vieweg, Nico ; Rettich, Florian ; Deninger, Anselm ; Roehle, H. ; Dietz, Roman ; Gobel, T.

Author_Institution

TOPTICA Photonics AG, Grafelfing, Germany

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

We present a time-domain terahertz spectrometer based on 1550 nm fiber laser technology and InGaAs photoconductive switches. The system features a voice-coil delay stage, which offers a high scanning speed of up to 60 traces per second. Owing to a precise reconstruction of the time axis, the system achieves a high dynamic range: a single pulse trace of 50 ps is acquired in only 44 ms, and transformed into a spectrum with a peak dynamic range of 60 dB. With 800 averages, the dynamic range increases to 90 dB and the measurement time still remains as short as 35 seconds.

Keywords

III-V semiconductors; fibre lasers; gallium arsenide; high-speed optical techniques; indium compounds; measurement by laser beam; photoconducting switches; terahertz spectroscopy; InGaAs; fiber laser technology; photoconductive switch; single pulse trace; time domain terahertz spectrometer; voice coil delay stage; wavelength 1550 nm; Bandwidth; Dynamic range; Indium gallium arsenide; Optical fiber polarization; Optical fiber sensors; Time-domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956178

Filename

6956178