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Refractive index reconstruction of graded-index buried channel waveguides from their mode intensities

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2 Author(s)
Von Bibra, M.L. ; Sch. of Phys., Melbourne Univ., Parkville, Vic., Australia ; Roberts, A.

The refractive index distribution has been determined for a number of graded-index, single-mode, buried channel waveguides, formed by irradiation with a high energy focused ion beam. The refractive index has been calculated from the waveguide's mode field intensity at a wavelength of 670 nm, via an inversion of the scalar wave equation. Waveguides with doses in the range 0.7×1015-4.1×1015 ions·cm-2 exhibited a peak refractive index change increasing linearly with ion dose, in the range 0.01-0.08%, and the results are consistent with profiles derived from TRIM simulations

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Lightwave Technology, Journal of  (Volume:15 ,  Issue: 9 )