Suppressed carrier techniques for multi-octave high dynamic range microwave photonic links

Charles Middleton; Richard DeSalvo

doi:10.1117/12.839697

4 August 2009 Suppressed carrier techniques for multi-octave high dynamic range microwave photonic links

Charles Middleton, Richard DeSalvo

Proceedings Volume 7386, Photonics North 2009; 738626 (2009) https://doi.org/10.1117/12.839697
Event: Photonics North 2009, 2009, Quebec, Canada

Abstract

Optical transmission of microwave signals offers many advantages such as increased bandwidth, immunity to electromagnetic interference, reduction of size and weight, and minimal loss over long distances. But microwave photonic links often lack the sufficiently high dynamic range and large instantaneous bandwidth required in many applications. Optical carrier suppression has been used to increase link dynamic range, but second harmonic distortion terms limit the operational bandwidth to sub-octave applications. We present a method to apply carrier suppression to microwave photonic links while maintaining multi-octave operation. Our technique uses double sideband suppressed carrier modulation together with coherent heterodyne balanced detection to increase dynamic range, eliminate bandwidth-limiting second-order distortion terms, and reduce link noise figure. This approach provides efficient amplification of the modulated signal while limiting the effect of shot noise from the source laser and reducing common-mode noise terms such as source laser RIN and amplifier-related beat noise.

Citation Download Citation

Charles Middleton and Richard DeSalvo "Suppressed carrier techniques for multi-octave high dynamic range microwave photonic links", Proc. SPIE 7386, Photonics North 2009, 738626 (4 August 2009); https://doi.org/10.1117/12.839697

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