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Optics Letters

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  • Vol. 25, Iss. 16 — Aug. 15, 2000
  • pp: 1180–1182

High-dynamic-range cascaded-focus optical limiter

F. E. HernÃÂndez, S. Yang, E. W. Van Stryland, and D. J. Hagan  »View Author Affiliations


Optics Letters, Vol. 25, Issue 16, pp. 1180-1182 (2000)
http://dx.doi.org/10.1364/OL.25.001180


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Abstract

We report experimental results of using an f/5 , cascaded-focus optical geometry for a high-dynamic-range optical limiter. The device consists of a 2-cm-thick CS<sub>2</sub> cell at the first focus and a reverse saturable-absorber dye in a thin cell (0.1 mm) at the second focus. The strong self-focusing in the CS<sub>2</sub> that is due to the ac Kerr effect and electrostriction keeps the energy at the second cell below its damage threshold. Using lead phthalocyanine in chloroform as the reverse saturable-absorption material, we clamped the maximum output energy below 1μJ for input energies up to 14.5 mJ without damage. We used a frequency-doubled, Q -switched 5-ns (FWHM) Nd:YAG laser operating at a 10-Hz repetition rate. The measured dynamic range of the device is at least 7500.

© 2000 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(260.5950) Physical optics : Self-focusing

Citation
F. E. HernÃÂndez, S. Yang, E. W. Van Stryland, and D. J. Hagan, "High-dynamic-range cascaded-focus optical limiter," Opt. Lett. 25, 1180-1182 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-16-1180


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