Comparison of GaAs and DAST electro-optic crystals for THz time domain spectroscopy using 1.55 µm fiber laser pulses

Matthieu Martin; Juliette Mangeney; Paul Crozat; Patrick Mounaix

doi:10.1117/12.876115

23 February 2011 Comparison of GaAs and DAST electro-optic crystals for THz time domain spectroscopy using 1.55 μm fiber laser pulses

Matthieu Martin, Juliette Mangeney, Paul Crozat, Patrick Mounaix

Author Affiliations +

Proceedings Volume 7938, Terahertz Technology and Applications IV; 793807 (2011) https://doi.org/10.1117/12.876115
Event: SPIE OPTO, 2011, San Francisco, California, United States

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 In_0.53Ga_0.47As 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.

Citation Download Citation

Matthieu Martin, Juliette Mangeney, Paul Crozat, and Patrick Mounaix "Comparison of GaAs and DAST electro-optic crystals for THz time domain spectroscopy using 1.55 μm fiber laser pulses", Proc. SPIE 7938, Terahertz Technology and Applications IV, 793807 (23 February 2011); https://doi.org/10.1117/12.876115

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