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Femtosecond laser fabrication of tubular waveguides in poly(methyl methacrylate)
2004
Optics Letters
Preserved Fulltext
Femtosecond laser direct writing is employed for the fabrication of buried tubular waveguides in bulk poly(methyl methacrylate). A novel technique using selective chemical etching is presented to resolve the two-dimensional refractive-index profile of the fabrication structures. End-to-end coupling in the waveguides reveals a near-field intensity distribution that results from the superimposition of several propagating modes with different azimuthal symmetries. Mode analysis of the tubular
doi:10.1364/ol.29.001840
pmid:15357333
fatcat:d2olwvyeorhj3bw6qfheeljhde