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1 December 1992 High-bandwidth velocity-matched optical directional coupler modulator in AlGaAs/GaAs
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Abstract
We report a design of a very high frequency A1GaAs/GaAs optical modulator using a dielectric loading velocity matching technique. The optical modulator is a directional coupler which is covered with a thin coating of Ta2O5 to match the velocities of the lightwave and the if modulating signal to within 2%. The optical and rf characteristics of the modulator are analyzed using the effective index and finite difference methods. The small signal 3 dB bandwidth for the modulator is predicted to exceed 45GHz and 100 GHz for biasing at the null point and in the linear region respectively, with a maximum modulation voltage of 5V at 830nm wavelength.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Nisa Khan "High-bandwidth velocity-matched optical directional coupler modulator in AlGaAs/GaAs", Proc. SPIE 1582, Integrated Optoelectronics for Communication and Processing, (1 December 1992); https://doi.org/10.1117/12.2321810
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