High-speed cutoff modulator using a Ti-diffused LiNbO3 channel waveguide
- 1 August 1979
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 35 (3) , 256-258
- https://doi.org/10.1063/1.91091
Abstract
A high‐speed intensity modulator has been fabricated taking advantage of the dependence of waveguide cutoff on its index of refraction. The modulator consists essentially of a 2‐μm‐wide 3.2‐mm‐long Ti‐diffused channel waveguide in y‐cut LiNbO3. By controlling the propagation cutoff through the electro‐optic effect, an intensity modulation is obtained. The potential bandwidth, optical insertion loss, and specific energy at 0.63 μm are 5.3 GHz, 11 dB, and 230 μW/MHz, respectively. A brief analysis of modulator operation is given based on coupled‐mode theory.Keywords
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