High-resolution THz spectrometer with kHz scan rates
Optics Express, Vol. 14, Issue 1, pp. 430-437 (2006)
http://dx.doi.org/10.1364/OPEX.14.000430
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Abstract
We demonstrate a rapid scanning high-resolution THz spectrometer capable of acquiring THz field transients with 1 ns duration without mechanical delay line. The THz spectrometer is based on two 1-GHz Ti:sapphire femtosecond lasers which are linked with a fixed repetition rate difference in order to perform high-speed asynchronous optical sampling. One laser drives a high-efficiency large-area GaAs based THz emitter, the other laser is used for electro-optic detection of the emitted THz-field. At a scan rate of 9 kHz a time resolution of 230 fs is accomplished. High-resolution spectra from 50 GHz up to 3 THz are obtained and water absorption lines with a width of 11 GHz are observed. The use of femtosecond lasers with 1 GHz repetition rate is essential to obtain rapid scanning and high time-resolution at the same time.
© 2006 Optical Society of America
OCIS Codes
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7150) Ultrafast optics : Ultrafast spectroscopy
ToC Category:
Ultrafast Optics
Virtual Issues
Vol. 1, Iss. 2 Virtual Journal for Biomedical Optics
Citation
A. Bartels, A. Thoma, C. Janke, T. Dekorsy, A. Dreyhaupt, S. Winnerl, and M. Helm, "High-resolution THz spectrometer with kHz scan rates," Opt. Express 14, 430-437 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-1-430
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