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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 19 — Sep. 14, 2009
  • pp: 17034–17043

Real-time monitoring of continuous-wave terahertz radiation using a fiber-based, terahertz-comb-referenced spectrum analyzer

Takeshi Yasui, Ryotaro Nakamura, Kohji Kawamoto, Atsushi Ihara, Yoshihide Fujimoto, Shuko Yokoyama, Hajime Inaba, Kaoru Minoshima, Tadao Nagatsuma, and Tsutomu Araki  »View Author Affiliations


Optics Express, Vol. 17, Issue 19, pp. 17034-17043 (2009)
http://dx.doi.org/10.1364/OE.17.017034


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Abstract

We propose a fiber-based, terahertz-comb-referenced spectrum analyzer which has the advantages of being a portable, alignment-free, robust, and flexible apparatus suitable for practical use. To this end, we constructed a 1550-nm mode-locked Er-doped fiber laser whose mode-locked frequency was stabilized precisely by referring to a rubidium frequency standard, and used it to generate a highly stable terahertz (THz) frequency comb in a photoconductive antenna or an electro-optic crystal. By standardizing the THz comb, we determined the frequency accuracy of an active-frequency-multiplier-chain (AFMC) source to be 2.4 × 10−11. Furthermore, the potential of the THz spectrum analyzer was effectively demonstrated by real-time monitoring of the spectral behavior of the AFMC source and a photomixing source of two free-running CW lasers at adjacent wavelengths.

© 2009 OSA

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Spectroscopy

History
Original Manuscript: July 21, 2009
Revised Manuscript: September 2, 2009
Manuscript Accepted: September 2, 2009
Published: September 9, 2009

Citation
Takeshi Yasui, Ryotaro Nakamura, Kohji Kawamoto, Atsushi Ihara, Yoshihide Fujimoto, Shuko Yokoyama, Hajime Inaba, Kaoru Minoshima, Tadao Nagatsuma, and Tsutomu Araki, "Real-time monitoring of continuous-wave terahertz radiation using a fiber-based, terahertz-comb-referenced spectrum analyzer," Opt. Express 17, 17034-17043 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-19-17034


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References

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