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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 22 — Nov. 15, 2013
  • pp: 4625–4628

Two-tone frequency-modulation spectroscopy in off-axis cavity

P. Malara, M. F. Witinski, G. Gagliardi, and P. De Natale  »View Author Affiliations

Optics Letters, Vol. 38, Issue 22, pp. 4625-4628 (2013)

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As opposed to a conventional optical resonator, an off-axis-aligned cavity is able to transmit without distortion radiation modulated at a frequency even far above the cavity bandpass. This allows us to implement a simple spectroscopic technique that combines the cavity path-length enhancement of integrated cavity output spectroscopy (ICOS) and the noise reduction associated with radio-frequency modulation (FM). An FM-ICOS spectrometer is demonstrated for the first time using a two-tone modulation technique. The performance is compared to the traditional ICOS by examining the acetylene absorption at 1543.77 nm. A signal-to-noise ratio improvement by a factor 3.5 is found with our proof-of-concept setup. Larger improvements are expected in a more optimized setup.

© 2013 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6310) Spectroscopy : Spectroscopy, heterodyne
(300.6380) Spectroscopy : Spectroscopy, modulation
(300.6390) Spectroscopy : Spectroscopy, molecular

ToC Category:

Original Manuscript: July 29, 2013
Revised Manuscript: September 25, 2013
Manuscript Accepted: October 7, 2013
Published: November 6, 2013

P. Malara, M. F. Witinski, G. Gagliardi, and P. De Natale, "Two-tone frequency-modulation spectroscopy in off-axis cavity," Opt. Lett. 38, 4625-4628 (2013)

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  1. D. Romanini, A. A. Kachanov, N. Sadeghi, and F. Stockel, Chem. Phys. Lett. 264, 316 (1997). [CrossRef]
  2. K. Nakagawa, T. Katsuda, A. S. Shelkovnikov, M. de Labachelerie, and M. Ohtsu, Opt. Commun. 107, 369 (1994). [CrossRef]
  3. J. B. Paul, L. Lapson, and J. Anderson, Appl. Opt. 40, 4904 (2001). [CrossRef]
  4. P. Maddaloni, G. Gagliardi, P. Malara, and P. De Natale, J. Opt. Soc. Am. B 23, 1938 (2006). [CrossRef]
  5. E. J. Moyer, D. S. Sayres, G. S. Engel, J. M. St. Clair, F. N. Keutsch, N. T. Allen, J. H. Kroll, and J. G. Anderson, Appl. Phys. B 92, 467 (2008). [CrossRef]
  6. G. S. Engel, W. S. Drisdell, F. N. Keutsch, E. J. Moyer, and J. G. Anderson, Appl. Opt. 45, 9221 (2006). [CrossRef]
  7. J. M. Supplee, E. A. Whittaker, and W. Lenth, Appl. Opt. 33, 6294 (1994). [CrossRef]
  8. A. Dharamsi, J. Phys. D 29, 540 (1996). [CrossRef]
  9. D. E. Cooper and J. P. Watjen, Opt. Lett. 11, 606 (1986). [CrossRef]
  10. G. C. Bjorklund, Opt. Lett. 5, 15 (1980). [CrossRef]
  11. P. Werle, F. Slemr, M. Gehrtz, and C. Bräuchle, Appl. Phys. B 49, 99 (1989). [CrossRef]
  12. J. A. Silver, Appl. Opt. 31, 707 (1992). [CrossRef]
  13. J. Ye, L.-S. Ma, and J. L. Hall, J. Opt. Soc. Am. B 15, 6 (1998). [CrossRef]
  14. D. R. Herriott, H. Kogelnik, and R. Kompfner, Appl. Opt. 3, 523 (1964). [CrossRef]
  15. P. Malara, M. F. Witinski, F. Capasso, J. G. Anderson, and P. De Natale, Appl. Phys. B 108, 353 (2012). [CrossRef]
  16. W. Zhao, X. Gao, W. Chen, W. Zhang, T. Huang, T. Wu, and H. Cha, Appl. Phys. B 86, 353 (2007). [CrossRef]
  17. V. L. Kasyutich, C. E. Canosa-Mas, C. Pfrang, S. Vaughan, and R. P. Wayne, Appl. Phys. B 75, 755 (2002). [CrossRef]
  18. Y. A. Bakhirkin, A. A. Kosterev, C. Roller, R. F. Curl, and F. K. Tittel, Appl. Opt. 43, 2257 (2004). [CrossRef]
  19. A. Zybin, Y. A. Kuritsyn, V. R. Mironenko, and K. Niemax, Appl. Phys. B 78, 103 (2004). [CrossRef]

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