Method and apparatus for creating large second-order nonlinearit

Details Method and apparatus for creating large second-order nonlinearit Method and apparatus for creating large second-order nonlinearit

1991-09-27

1993-08-24

Ullah, Akm E.

Optical: systems and elements

Optical frequency converter

385122, 385141, G02F 137

Patent

active

052394077

ABSTRACT:
A large second-order nonlinearity (.chi..sup.(2) .about.1 pm/V.about.0.2 .chi..sup.(2).sub.22 of LiNbO.sub.3) is induced in the near surface (.about.4 .mu.m) region of commercial fused silica optical flats by a temperature (250.degree.-325.degree. C.) and electric field (E.about.5.times.10.sup.4 V/cm) poling process. Once formed, the nonlinearity is roughly 10.sup.3 -10.sup.4 larger than that found in fiber second-harmonic experiments and is very stable at room temperature and laboratory ambient. The nonlinearity can be cycled by repeated depoling (temperature only) and repoling (temperature and electric field) processes.

REFERENCES:
patent: 4255017 (1981-03-01), Hasegawa
"Determination of the Nonlinear Optical Susceptibility .chi..sup.2 of Surface Layers by Sum and Differences Frequency Generation in Reflection and Transmission" by Dick et al. Appl. Phys. B38 107-116 (1985).
"Large Second-order nonlinearity in poled fused silica" by Myers, Optics Letters/vol. 16, No. 22, Nov. 15, 1991.
Osterberg, U. & Margulis, W. Opt. Lett. 11 516 (Aug. 1986).
Stolen, R. H.; Tom, H. W. K, Opt. Lett. 12, 585 (Aug. 1987).
Anderson, D. Z.; Mizrahi V; Sipe J. E.; Opt. Lett. 16, 796 (Jun. 1991).
Kamal, A et al. Digest of Optical Society of America Annual Meeting, Optical Society of America Washington, D.C. Nov. 1990 paper PD25.
Mukherjee A.; Brueck, S. R. J.; Wu, A. Y. Opt. Commun. 76, 220 (May 1990).
Carvalho, I. C. S. et al. "Proc. of the 1991 Conference on Lasers and Electrooptics" Optical Society of America Washington D.C., May 1991 Paper JTuA3.

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