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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 25 — Dec. 10, 2007
  • pp: 17443–17448

Cavity-enhanced laser absorption spectroscopy using microresonator whispering-gallery modes

G. Farca, S. I. Shopova, and A. T. Rosenberger  »View Author Affiliations

Optics Express, Vol. 15, Issue 25, pp. 17443-17448 (2007)

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Tunable diode laser absorption spectroscopy using microresonator whispering-gallery modes (WGMs) is demonstrated. WGMs are excited around the circumference of a cylindrical cavity 125 µm in diameter using an adiabatically tapered fiber. The microresonator is very conveniently tuned by stretching, enabling the locking of an individual WGM to the laser. As the laser is scanned in frequency over an atmospheric trace-gas absorption line, changes in the fiber throughput are recorded. The experimental results of cavity-enhanced detection using such a microresonator are centimeter effective absorption pathlengths in a volume of only a few hundred microns cubed. The measured effective absorption pathlengths are in good agreement with theory.

© 2007 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.5750) Optical devices : Resonators
(300.1030) Spectroscopy : Absorption
(350.3950) Other areas of optics : Micro-optics

ToC Category:

Original Manuscript: October 1, 2007
Revised Manuscript: October 19, 2007
Manuscript Accepted: October 21, 2007
Published: December 10, 2007

Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics
Physics and Applications of Microresonators (2007) Optics Express

G. Farca, S. I. Shopova, and A. T. Rosenberger, "Cavity-enhanced laser absorption spectroscopy using microresonator whispering-gallery modes," Opt. Express 15, 17443-17448 (2007)

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  1. M. Cai, G. Hunziker, and K. Vahala, "Fiber-Optic Add-Drop Device Based on a Silica Microsphere-Whispering Gallery Mode System," IEEE Photon. Technol. Lett. 11, 686-687 (1999). [CrossRef]
  2. S. I. Shopova, G. Farca, A. T. Rosenberger, W. M. S. Wickramanayake, and N. A. Kotov, "Microsphere whispering-gallery-mode laser using HgTe quantum dots," Appl. Phys. Lett. 85, 6101-6103 (2004). [CrossRef]
  3. I. Teraoka, S. Arnold, and F. Vollmer, "Perturbation approach to resonance shifts of whispering-gallery modes in a dielectric microsphere as a probe of a surrounding medium," J. Opt. Soc. Am. B 20, 1937-1946 (2003). [CrossRef]
  4. N. M. Hanumegowda, C. J. Stica, B. C. Patel, I. White and X. Fan, "Refractometric sensors based on microsphere resonators," Appl. Phys. Lett. 87, 201107 (2005). [CrossRef]
  5. A. M. Armani and K. J. Vahala, "Heavy water detection using ultra-high-Q microcavities," Opt. Lett. 31, 1896-1898 (2006). [CrossRef] [PubMed]
  6. A. T. Rosenberger and J. P. Rezac, "Whispering-gallery-mode evanescent-wave microsensor for trace-gas detection," Proc. SPIE 4265, 102-112 (2001). [CrossRef]
  7. R. W. Boyd and J. E. Heebner, "Sensitive disk resonator photonic biosensor," Appl. Opt. 40, 5742-5747 (2001). [CrossRef]
  8. M. L. Gorodetsky and V. S. Ilchenko, "Optical microsphere resonators: optimal coupling to high-Q whispering-gallery modes," J. Opt. Soc. Am. B 16, 147-154 (1999). [CrossRef]
  9. M. Cai, O. Painter, and K. J. Vahala, "Observation of Critical Coupling in a Fiber Taper to a Silica-Microsphere Whispering-Gallery Mode System," Phys. Rev. Lett. 85, 74-77 (2000). [CrossRef] [PubMed]
  10. A. T. Rosenberger, "Analysis of whispering-gallery microcavity-enhanced chemical absorption sensors," Opt. Express 15, 12959-12964 (2007). [CrossRef] [PubMed]
  11. M. J. Humphrey, E. Dale, A. T. Rosenberger, and D. K. Bandy, "Calculation of optimal fiber radius and whispering-gallery mode spectra for a fiber-coupled microsphere," Opt. Commun. 271, 124-131 (2007). [CrossRef]
  12. J. P. Rezac and A. T. Rosenberger, "Locking a microsphere whispering-gallery mode to a laser", Opt. Express 8, 605-610 (2001). [CrossRef] [PubMed]
  13. S.-I Chou, D. S. Baer, and R. K. Hanson, "Diode laser absorption measurements of CH3Cl and CH4 near 1.65 μm," Appl. Opt. 36, 3288-3293 (1997). [CrossRef] [PubMed]
  14. A. Boschetti, D. Bassi, E. Iacob, S. Iannotta, L. Ricci, and M. Scotoni, "Resonant photoacoustic simultaneous detection of methane and ethylene by means of a 1.63-μm diode laser," Appl. Phys. B 74, 273-278 (2002). [CrossRef]
  15. L. S. Rothman, C. P. Rinsland, A. Goldman, S. T. Massie, D. P. Edwards, J.-M. Flaud, A. Perrin, C. Camy-Peyret, V. Dana, J.-Y. Mandin, J. Schroeder, A. McCann, R. R. Gamache, R. B. Wattson, K. Yoshino, K. V. Chance, K. W. Jucks, L. R. Brown, V. Nemtchinov, and P. Varanasi, "The HITRAN Molecular Spectroscopic Database and HAWKS (HITRAN Atmospheric Workstation): 1996 Edition," J. Quant. Spectrosc. Radiat. Transfer 60, 665-710 (1998). [CrossRef]
  16. W. von Klitzing, R. Long, V. S. Ilchenko, J. Hare, and V. Lefèvre-Seguin, "Tunable whispering gallery modes for spectroscopy and CQED experiments," New J. Phys. 3, 14.1-14.14 (2001). [CrossRef]

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