Low-loss strain induced optical waveguides in strontium barium niobate (Sr0.6Ba0.4Nb2O6) at 1.3 μm wavelength
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Low-loss optical waveguides have been produced in z-cut Sr0.6Ba0.4Nb2O6 (SBN:60) and electro-optic modulation has been demonstrated at a wavelength of 1.3 μm. The refractive index increase responsible for waveguiding results from a strain produced by a SiO2 film which has been deposited on the surface of the substrate at 320°C. The waveguides are formed in the crystal by dry etching of channels in the strain film. The resulting optical waveguides support both polarizations. Propagation loss values of 0.7 dB/cm for TM polarization and 1.6 dB/cm for TE polarization were measured. Electro-optic modulation up to 22 MHz was performed on repoled samples using coplanar electrodes. © 1995 American Institute of Physics.
author list (cited authors)
Marx, J. M., Tang, Z., Eknoyan, O., Taylor, H. F., & Neurgaonkar, R. R.