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Optics Letters

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  • Vol. 24, Iss. 3 — Feb. 1, 1999
  • pp: 130–132

Strong beam coupling in mesogenic materials with photorefractive Bragg gratings

Hiroshi Ono and Nobuhiro Kawatsuki  »View Author Affiliations


Optics Letters, Vol. 24, Issue 3, pp. 130-132 (1999)
http://dx.doi.org/10.1364/OL.24.000130


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Abstract

Strong beam coupling was observed in mesogenic materials consisting of low- and high-molar-mass liquidcrystal mixtures with high concentration ratios of the latter type of liquid crystal. The beam-coupling effects originate in orientational photorefractive Bragg gratings, and a weak signal beam with an intensity of 1 mW is amplif ied to 8 mW by energy exchange with a strong pump beam after the passage of a 50-μm-thick film under a low operating voltage of 1–4 V/ μm. There is a superior net two-beam coupling gain of more than 600 cm-1 with the low operating voltage and high resolution.

© 1999 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(160.5320) Materials : Photorefractive materials
(230.1480) Optical devices : Bragg reflectors

Citation
Hiroshi Ono and Nobuhiro Kawatsuki, "Strong beam coupling in mesogenic materials with photorefractive Bragg gratings," Opt. Lett. 24, 130-132 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-3-130

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