WHITE-LIGHT SPECTRAL-ANALYSIS OF LITHIUM-NIOBATE WAVE-GUIDES

In this paper, the usefulness of evaluating optical channel waveguides in Lithium Niobate with white light illumination is shown. Spectral d ata can be interpreted to show various regimes of waveguide operation from multi-mode to cutoff, and input coupling coefficients and attenua tion factors are derived for these different modes. This technique is shown to be useful as a monitor both for process development and proce ss consistency. Finally, both a Mach-Zehnder and a phase modulator are swept under bias and analyzed.