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Applied Optics

Applied Optics


  • Vol. 40, Iss. 36 — Dec. 20, 2001
  • pp: 6646–6653

Optical limiting threshold in carbon suspensions and reverse saturable absorber materials

Denis Vincent  »View Author Affiliations

Applied Optics, Vol. 40, Issue 36, pp. 6646-6653 (2001)

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I report on the measurement of threshold energy fluence for optical limiting of nanosecond and microsecond pulses in a high-performance carbon suspension known as Defence Research Establishment Valcartier carbon black suspension (CBS)-100. Thresholds as low as 24-mJ/cm2 (nanosecond regime) and 100-mJ/cm2 (microsecond regime) have been obtained. The measurement technique, based on an f/20 optical system and a small analysis aperture, has been tested by measurement of reverse saturable absorber materials and other carbon suspensions whose properties can be found in the technical literature. A factor of merit has emerged from these measurements that could be used to order by limiting performance the different types of carbon suspension. In this ordering, CBS-100 appears as the best choice in the set of suspensions tested for short and long pulses.

© 2001 Optical Society of America

OCIS Codes
(140.3360) Lasers and laser optics : Laser safety and eye protection
(160.4330) Materials : Nonlinear optical materials
(160.4670) Materials : Optical materials
(190.4400) Nonlinear optics : Nonlinear optics, materials
(230.4320) Optical devices : Nonlinear optical devices

Original Manuscript: March 7, 2001
Revised Manuscript: June 29, 2001
Published: December 20, 2001

Denis Vincent, "Optical limiting threshold in carbon suspensions and reverse saturable absorber materials," Appl. Opt. 40, 6646-6653 (2001)

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  1. D. Vincent, “High-performance optical limiter based on fine carbon particles suspended in an organic solvent,” Nonlinear Opt. 21, 413–422 (1999).
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