We designed and built a near-field scanning optical microscope to investigate the properties of femtosecond laser written waveguides in erbium doped phosphate glass. Fine structure in the mode field is identified using this diagnostic technique.
© 2005 Optical Society of America
M. J. Withford, G. D. Marshall, M. Ams, and D. Little, "Near-Field Scanning Optical Microscopy of Femtosecond Laser Written Waveguides," in Advanced Solid-State Photonics, Technical Digest (Optical Society of America, 2005), paper WB13.
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