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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 21, Iss. 24 — Dec. 15, 1996
  • pp: 2032–2034

Negative-index gratings formed by a 193-nm excimer laser

L. Dong, W. F. Liu, and L. Reekie  »View Author Affiliations


Optics Letters, Vol. 21, Issue 24, pp. 2032-2034 (1996)
http://dx.doi.org/10.1364/OL.21.002032


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Abstract

We have demonstrated fast formation [~1500 pulses at ~1 (J/cm2)/pulse] of fiber gratings with highly negative index modulations (~−3 × 10−4). We have found that the maximum negative index modulations that are achieved do not depend on the pulse intensities, although the inverse of the time taken to reach the negative index-modulation maximum varies linearly with the pulse intensities. This prompts us to use a three-energy-level system to model the photosensitivity in boron-doped germanosilicate fiber. All the necessary parameters of the model can be determined from a single growth measurement of the average index change, and the model’s prediction fits well the measured index-modulation growth.

© 1996 Optical Society of America

History
Original Manuscript: August 13, 1996
Published: December 15, 1996

Citation
L. Dong, W. F. Liu, and L. Reekie, "Negative-index gratings formed by a 193-nm excimer laser," Opt. Lett. 21, 2032-2034 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-24-2032

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