40-GHz electro-optic polarization modulator for fiber optic communications systems

Jeffrey D. Bull; Nicolas A.F. Jaeger; Hiroshi Kato; Mark Fairburn; Adam Reid; Pejman Ghanipour

doi:10.1117/12.567640

20 December 2004 40-GHz electro-optic polarization modulator for fiber optic communications systems

Jeffrey D. Bull, Nicolas A.F. Jaeger, Hiroshi Kato, Mark Fairburn, Adam Reid, Pejman Ghanipour

Proceedings Volume 5577, Photonics North 2004: Optical Components and Devices; (2004) https://doi.org/10.1117/12.567640
Event: Photonics North, 2004, Ottawa, Ontario, Canada

Abstract

A novel ultrahigh-speed electro-optic polarization modulator is introduced. The modulator uses a mode converter and a static polarization controller to change the output polarization state in a circular path, following a great circle, around the Poincaré sphere. Any two states on the Poincaré sphere can be connected. The mode converter is constructed using an AlGaAs ridge waveguide combined with slow-wave travelling wave electrodes. The travelling wave electrodes are designed to match the velocity of the electrical modulating signal, the data signal, to the optical carrier signal over a broad frequency range. This modulator demonstrates a 3 dB bandwidth in excess of 40 GHz. The polarization modulator exhibits extremely low differential group delay, on the order of a few 10s of femto-seconds, and low drive voltage, on the order of 5 V.

Citation Download Citation

Jeffrey D. Bull, Nicolas A.F. Jaeger, Hiroshi Kato, Mark Fairburn, Adam Reid, and Pejman Ghanipour "40-GHz electro-optic polarization modulator for fiber optic communications systems", Proc. SPIE 5577, Photonics North 2004: Optical Components and Devices, (20 December 2004); https://doi.org/10.1117/12.567640

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