Fabrication and characterization of channel optical waveguides in Er/Yb-doped silicate glasses

Chemical composition of the fabricated waveguiding layers was determined by scanning electron microscopy (SEM-EDAX). Optical properties of the waveguides were characterized by a standard dark mode spectroscopy at the wavelength of 671 nm and by near field imaging in the spectral range from 1500 to 1640 nm.