OSA's Digital Library

Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 19 — Jul. 1, 2007
  • pp: 3976–3980

Differentiation of CO isotopic variants by frequency tuning a terahertz source

Hongqian Sun, Yujie J. Ding, and Yuliya B. Zotova  »View Author Affiliations

Applied Optics, Vol. 46, Issue 19, pp. 3976-3980 (2007)

View Full Text Article

Enhanced HTML    Acrobat PDF (1882 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



The transmission spectra of two CO isotopic variants, i.e., CO 12 and CO 13 , are measured with a recently developed widely tunable THz source. The pure rotational transition lines of J = 6 7 , 10 11 , 11 12 , 12 13 , and 13 14 have been identified in the spectra. The transition frequencies and the rotational constant of each CO isotopic variant are also presented. Experimental results indicate that the difference of the rotational constants between the two isotopic variants can be used to reliably differentiate CO 12 and CO 13 . Compared with the measurements made by using a Fourier transform infrared spectrometer, our tunable THz source has produced approximately the same accuracies for measuring transition frequencies or determining rotational constants.

© 2007 Optical Society of America

OCIS Codes
(300.6270) Spectroscopy : Spectroscopy, far infrared
(300.6390) Spectroscopy : Spectroscopy, molecular

ToC Category:
Absorption and Cavity-Based Techniques

Original Manuscript: October 13, 2006
Revised Manuscript: February 15, 2007
Manuscript Accepted: February 28, 2007
Published: June 12, 2007

Hongqian Sun, Yujie J. Ding, and Yuliya B. Zotova, "Differentiation of CO isotopic variants by frequency tuning a terahertz source," Appl. Opt. 46, 3976-3980 (2007)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. W. Shi and Y. J. Ding, "Monochromatic and high-power THz source tunable in the range of 2.7-38.4 μm and 58.2-3540 μm for variety of potential applications," Appl. Phys. Lett. 84, 1635-1637 (2004). [CrossRef]
  2. P. Atkins and R. Friedman, Molecular Quantum Mechanics, 4th ed. (Oxford U. Press, 2005).
  3. T. D. Varberg and K. M. Evenson, "Accurate Far-Infrared rotational frequencies of carbon monoxide," Astrophys. J. 385, 763-765 (1992). [CrossRef]
  4. L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990). [CrossRef]
  5. I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987). [CrossRef]
  6. G. Winnewisser, S. P. Belov, Th. Klaus, and R. Schieder, "Sub-Doppler measurements on the rotational transitions of carbon monoxide," J. Mol. Spectrosc. 184, 468-472 (1997). [CrossRef]
  7. G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000). [CrossRef]
  8. J. W. Fleming and John Chamberlain, "High resolution far infrared Fourier transform spectroscopy using Michelson interferometers with and without collimation," Infrared Phys. 14, 277-292 (1974). [CrossRef]
  9. S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998). [CrossRef] [PubMed]
  10. G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991). [CrossRef]
  11. Y. J. Ding and W. Shi, "Phase-matched frequency mixing of THz and near-infrared laser pulses in a ZnGeP2 crystal," Opt. Express 14, 8311-8316 (2006). [CrossRef] [PubMed]
  12. J.-M. Flaud, C. Camy-Peyret, and R. A. Toth, Water Vapor Parameters From Microwave to Medium Infrared (Pergamon, 1981).
  13. H. Harde, R. A. Cheville, and D. Grischkowsky, "Terahertz studies of collision-broadended rotational lines," J. Phys. Chem. A 101, 3646-3660 (1997). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited