Demonstration of distortion suppression in photonic time-stretch ADC using back propagation method
Paper in proceedings, 2007

We experimentally demonstrate the performance of the recently proposed "OBP" algorithm based on optical phase retrieval by numerical back-propagation. Using this technique, distortion due to the modulator transfer function as well as the group velocity dispersion in a photonic time-stretch ADC (TS-ADC) can be suppressed, and frequency fading eliminated thanks to the use of a dual output "phase diverse" modulator. The algorithm was tested with a swept input signal frequency from 10 to 50 GHz as well as with a two-tone signal, and is shown to recover the signal even in the presence of fading with a distortion suppression of up to 26 dB. These results also constitute the first experimental demonstration of channel combining in a phase diverse TS-ADC. © 2007 IEEE.


Sheila Galt

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Johan Stigwall

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

S. Gupta


Sheila Galt


MWP 2007 - 2007 IEEE International Topical Meeting on Microwave Photonics

Pages 141-144

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Atom and Molecular Physics and Optics





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