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 Ta205 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 45 GHz 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.
Original language | English (US) |
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Pages (from-to) | 260-263 |
Number of pages | 4 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 1582 |
DOIs | |
State | Published - 1991 |
Event | Integrated Optoelectronics for Communication and Processing 1991 - Boston, United States Duration: Sep 1 1991 → Sep 7 1991 |
Bibliographical note
Publisher Copyright:© 1991 SPIE. All rights reserved.