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Optics Letters

Optics Letters


  • Vol. 36, Iss. 16 — Aug. 15, 2011
  • pp: 3094–3096

Optical fiber-coupled InGaAs-based terahertz time–domain spectroscopy system

Sang-Pil Han, Hyunsung Ko, Namje Kim, Han-Cheol Ryu, Chul Wook Lee, Young Ahn Leem, Donghun Lee, Min Yong Jeon, Sam Kyu Noh, Hyang Sook Chun, and Kyung Hyun Park  »View Author Affiliations

Optics Letters, Vol. 36, Issue 16, pp. 3094-3096 (2011)

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The successful demonstration of an optical fiber-coupled terahertz time–domain spectroscopy (THz-TDS) system is described in this study. The terahertz output power of the emitter with two optical band rejection filters was 132 nW , which is an improvement of 70% over the output power without any filters. This improvement is due to the suppression of an optical modulated signal that is reverse-generated when an alternating current bias exceeding a certain threshold is applied to the emitter. Under the optimal alignment conditions, the terahertz detector in a fiber-coupled THz-TDS system clearly measured water vapor dips in the free space.

© 2011 Optical Society of America

OCIS Codes
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(260.5150) Physical optics : Photoconductivity
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:

Original Manuscript: May 10, 2011
Revised Manuscript: July 11, 2011
Manuscript Accepted: July 15, 2011
Published: August 8, 2011

Sang-Pil Han, Hyunsung Ko, Namje Kim, Han-Cheol Ryu, Chul Wook Lee, Young Ahn Leem, Donghun Lee, Min Yong Jeon, Sam Kyu Noh, Hyang Sook Chun, and Kyung Hyun Park, "Optical fiber-coupled InGaAs-based terahertz time–domain spectroscopy system," Opt. Lett. 36, 3094-3096 (2011)

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