OSA's Digital Library

Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 3 — Mar. 1, 1998
  • pp: 989–995

Z-scan-based investigations of photorefractive self-focusing in KNbO3 crystals

Roland Ryf, Andreas Lötscher, Christian Bosshard, Marko Zgonik, and Peter Günter  »View Author Affiliations


JOSA B, Vol. 15, Issue 3, pp. 989-995 (1998)
http://dx.doi.org/10.1364/JOSAB.15.000989


View Full Text Article

Enhanced HTML    Acrobat PDF (237 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We present experimental and theoretical results of photorefractive one-dimensional self-focusing in an Fe-doped KNbO3 crystal. The self-focusing is investigated by Z-scan experiments with and without an applied electric field. We observe the strongest focusing effect for a ratio Iˆ/ID6 of the beam peak intensity to the so-called dark intensity (the intensity at which photoconductivity is equal to the conductivity in the dark). The good agreement between the presented theory and experiment in the Z-scan technique allows the precise determination of dark intensity, the photovoltaic field, and the electric field inside the crystal.

© 1998 Optical Society of America

OCIS Codes
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
(260.5950) Physical optics : Self-focusing

Citation
Roland Ryf, Andreas Lötscher, Christian Bosshard, Marko Zgonik, and Peter Günter, "Z-scan-based investigations of photorefractive self-focusing in KNbO3 crystals," J. Opt. Soc. Am. B 15, 989-995 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-3-989


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. A. Ashkin, G. D. Boyd, J. M. Dziedzic, R. G. Smith, A. A. Ballman, J. J. Levinstein, and K. Nassau, “Optically-induced refractive index inhomogeneities in LiNbO3 and LiTaO3,” Appl. Phys. Lett. 9, 72 (1966). [CrossRef]
  2. P. Günter and J.-P. Huignard, Photorefractive Materials and their Applications, Vol. 1 (Springer-Verlag, Berlin, 1988).
  3. M. Sheik-Bahae, A. A. Said, T. Wei, D. J. Hagan, and E. W. Van Stryland, “Sensitive measurement of optical nonlinearities using a single beam,” IEEE J. Quantum Electron. 26, 760 (1990). [CrossRef]
  4. Q. W. Song, C.-P. Zhang, and P. J. Talbot, “Anisotropic light-induced scattering and ‘position dispersion’ in KNbO3:Fe crystal,” Opt. Commun. 98, 269 (1993). [CrossRef]
  5. Q. Song, C.-P. Zhang, and P. J. Talbot, “Self-defocusing, self-focusing and speckle in LiNbO3 and KNbO3:Fe crystals,” Appl. Opt. 32, 7266 (1993). [CrossRef] [PubMed]
  6. P. A. Marquez-Aguilar, J. J. Sanchez-Mondragon, S. Stepanov, and G. Bloch, “Z-scan experiments with cubic photorefractive crystal Bi12TiO20,” Opt. Commun. 118, 165 (1995). [CrossRef]
  7. N. Korneev, P. A. Marquez-Aguilar, J. J. Sanchez-Mondragon, S. Stepanov, M. Klein, and B. Wechsler, “Anisotropy of steady-state two-dimensional lenses in photorefractive crystals with drift nonlinearity,” J. Mod. Opt. 43, 311 (1995). [CrossRef]
  8. N. V. Kukhtarev, V. B. Markov, S. G. Odulov, M. S. Soskin, and V. L. Vinetskii, “Holographic storage in electro-optic crystals,” Ferroelectrics 22, 961 (1979). [CrossRef]
  9. A. A. Zozulya and D. Z. Anderson, “Propagation of an optical beam in a photorefractive medium in the presence of a photogalvanic nonlinearity or an externally applied electric field,” Phys. Rev. A 51, 1521 (1995). [CrossRef]
  10. A. Grunnet-Jepsen, I. Aubrecht, and L. Solymar, “Investigation of the internal field in photorefractive materials and measurement of the effective electro-optic coefficient,” J. Opt. Soc. Am. B 12, 921 (1995). [CrossRef]
  11. M. Zgonik, R. Schlesser, I. Biaggio, E. Voit, J. Tscherry, and P. Günter, “Materials constants of KNbO3 relevant for electro- and acousto-optics,” J. Appl. Phys. 74, 1287 (1993). [CrossRef]
  12. D. N. Christodoulides and M. I. Carvalho, “Bright, dark, and gray spatial soliton states in photorefractive media,” J. Opt. Soc. Am. B 12, 1628 (1995). [CrossRef]
  13. G. Montemezzani and P. Günter, “Profile of photorefractive one-dimensional bright spatial soliton,” Opt. Lett. 22, 451 (1997). [CrossRef] [PubMed]
  14. B. Zysset, I. Biaggio, and P. Günter, “Refractive indices of orthorhombic KNbO3. I. Dispersion and temperature dependence,” J. Opt. Soc. Am. B 9, 380 (1992). [CrossRef]
  15. M. Taya, M. C. Bashaw, M. M. Fejer, M. Segev, and G. C. Valley, “Observation of dark photovoltaic spatial solitons,” Phys. Rev. A 52, 3095 (1995). [CrossRef] [PubMed]
  16. D. Weaire, B. S. Wherrett, D. A. B. Miller, and S. D. Smith, “Effect of low-power nonlinear refraction on laser beam propagation in InSb,” Opt. Lett. 4, 331 (1974). [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