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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 1 — Jan. 9, 2006
  • pp: 430–437

High-resolution THz spectrometer with kHz scan rates

A. Bartels, A. Thoma, C. Janke, T. Dekorsy, A. Dreyhaupt, S. Winnerl, and M. Helm  »View Author Affiliations

Optics Express, Vol. 14, Issue 1, pp. 430-437 (2006)

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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

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)

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