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Second-harmonic generation using gratings optically written by mode interference in poled optical fibres
M.E.Fermann, L.Li, M.C.Farries, L.J.Poyntz-Wright, and L.Dong
Second-order nonlinear susceptibility gratings are induced in optical fibers by mode interference of high-intensity blue light in the presence of an external dc electric poling field. An a result, efficient second-harmonic generation can be obtained for any infrared design wavelength.
Optics Letters (1989) Vol.14(14) pp.748-750
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