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Wideband, Low Driving Voltage Traveling-Wave Mach–Zehnder Modulator for RF Photonics

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3 Author(s)
Jarrahi, M. ; Stanford Univ., Stanford ; Lee, T.H. ; Miller, D.A.B.

We report the design, fabrication, and testing of a traveling-wave Mach-Zehnder modulator on a GaAs substrate. Operating at 870-nm wavelength, we obtained an extremely low driving voltage of 0.45 V and a high measurement-instrument-limited small-signal modulation bandwidth of 18 GHz, projected to an estimated bandwidth of 50 GHz. We have also monolithically integrated photodetectors with an impulse response of 8-ps full-width at half-maximum, and a saturation power of 330 mW, giving a flexible high-performance platform for RF photonics.

Published in:

Photonics Technology Letters, IEEE  (Volume:20 ,  Issue: 7 )