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7 October 2008 Gallium arsenide linearised electro-optic waveguide modulators for RF-on-fibre applications
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For certain applications that involve faithfully transmitting microwave signals around or between military platforms, it is essential to use RF-on-fibre or an RF-photonic link. This is especially true for a broadband RF signal which, when used to modulate a 200 THz optical carrier wave, becomes effectively very narrow band and so does not suffer the effects of dispersion or frequency dependent loss. The main reason why RF-photonics is not more widely used is because it is difficult to achieve the often very severe dynamic range requirements of many military systems. In this paper we describe our approach to making highly linearised electrical-to-optical transducers (electro-optic waveguide modulators) using a slightly modified version of a high-throughput gallium arsenide p-HEMT fabrication process. To make high dynamic range linearised modulators requires the unprecedented precision in fabrication and manufacture that this approach allows. We describe our most recent results on tuneable linearised modulators.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John M. Heaton, Yi Zhou, Harry Gao, Gayle Murdoch, Andrew Miller, Christopher Main, David Hannan, and Stephen Clements "Gallium arsenide linearised electro-optic waveguide modulators for RF-on-fibre applications", Proc. SPIE 7114, Electro-Optical Remote Sensing, Photonic Technologies, and Applications II, 71140M (7 October 2008);

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