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Optics Letters

Optics Letters


  • Vol. 27, Iss. 20 — Oct. 15, 2002
  • pp: 1845–1847

Fluoride semiconductor saturable-absorber mirror for ultrashort pulse generation

S. Schön, M. Haiml, L. Gallmann, and U. Keller  »View Author Affiliations

Optics Letters, Vol. 27, Issue 20, pp. 1845-1847 (2002)

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We demonstrate what is to our knowledge the first ultrabroadband monolithically grown AlGaAs/CaF2 semiconductor saturable-absorber mirror (SESAM) that covers nearly the entire gain spectrum of a Ti:sapphire laser. A large high-reflectivity bandwidth of more than 300 nm is provided by a device consisting of only six material layers. This fluoride SESAM had a modulation depth of 2.2%, a fast recovery time constant of less than 150 fs, and a slow recovery time constant of 1.2 ps. Using this SESAM inside a Ti:sapphire laser produced self-starting sub-10-femtosecond pulses.

© 2002 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(310.3840) Thin films : Materials and process characterization
(320.7080) Ultrafast optics : Ultrafast devices
(320.7100) Ultrafast optics : Ultrafast measurements

S. Schön, M. Haiml, L. Gallmann, and U. Keller, "Fluoride semiconductor saturable-absorber mirror for ultrashort pulse generation," Opt. Lett. 27, 1845-1847 (2002)

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  1. U. Keller, D. A. B. Miller, G. D. Boyd, T. H. Chiu, J. F. Ferguson, and M. T. Asom, Opt. Lett. 17, 505 (1992).
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  7. I. D. Jung, F. X. Kärtner, N. Matuschek, D. H. Sutter, F. Morier-Genoud, Z. Shi, V. Scheuer, M. Tilsch, T. Tschudi, and U. Keller, Appl. Phys. B 65, 137 (1997).
  8. Z. Zhang, T. Nakagawa, H. Takada, K. Torizuka, T. Sugaya, T. Mirua, and K. Kobayashi, Opt. Commun. 176, 171 (2000).
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  10. C. C. Desai, Surf. Technol. 14, 353 (1981).
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  12. S. Schön, M. Haiml, L. Gallmann, and U. Keller, J. Cryst. Growth 227–228, 172 (2001).
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  14. U. Keller, in Nonlinear Optics in Semiconductors, E. Garmire and A. Kost, eds. (Academic, Boston, Mass., 1999), Chap. 59, p. 211.
  15. S. Schön, M. Haiml, L. Gallmann, M. Achermann, and U. Keller, in Proceedings of the Conference on Optoelectronic and Microelectronic Materials and Devices (Institute of Electrical and Electronics Engineers, Piscataway, N.J., to be published).
  16. L. Gallmann, D. H. Sutter, N. Matuschek, G. Steinmeyer, U. Keller, C. Iaconis, and I. A. Walmsley, Opt. Lett. 24, 1314 (1999).

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