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Proceedings Paper

Comparison of GaAs and DAST electro-optic crystals for THz time domain spectroscopy using 1.55 µm fiber laser pulses
Author(s): Matthieu Martin; Juliette Mangeney; Paul Crozat; Patrick Mounaix
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Paper Abstract

We report terahertz time-domain spectroscopy (THz-TDS) system based on Er:fiber laser at 1.55 μm wavelength that integrates an ion-irradiated In0.53Ga0.47As photoconductive antenna as an emitter and a DAST electro-optic sensor as a detector. DAST crystal cannot be used in traditional electro-optic sampling set-ups because of its high intrinsic birefringence. We propose here THz detection in DAST crystal by using an optical phase detection technique. The detected bandwidth is 5 THz. The performances of our THz-TDS systems based on electro-optic detection in a DAST crystal using optical phase detection is compared theoretically to the performance of a THz-TDS systems based on electro-optic detection in a GaAs crystal using traditional polarization rotation detection.

Paper Details

Date Published: 23 February 2011
PDF: 7 pages
Proc. SPIE 7938, Terahertz Technology and Applications IV, 793807 (23 February 2011); doi: 10.1117/12.876115
Show Author Affiliations
Matthieu Martin, Institut d'Electronique Fondamentale, CNRS, Univ. Paris-Sud 11 (France)
Juliette Mangeney, Institut d'Electronique Fondamentale, CNRS, Univ. Paris-Sud 11 (France)
Paul Crozat, Institut d'Electronique Fondamentale, CNRS, Univ. Paris-Sud 11 (France)
Patrick Mounaix, CPMOH, CNRS, Univ. Bordeaux 1 (France)


Published in SPIE Proceedings Vol. 7938:
Terahertz Technology and Applications IV
Laurence P. Sadwick; Créidhe M. M. O'Sullivan, Editor(s)

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