Demonstration of distortion suppression in photonic time-stretch ADC using back propagation method
Paper i proceeding, 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, Mikroteknologi och nanovetenskap (MC2), Fotonik

Johan Stigwall

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

S. Gupta

Chalmers University of Technology

Sheila Galt

Chalmers University of Technology

MWP 2007 - 2007 IEEE International Topical Meeting on Microwave Photonics

Pages 141-144



Atom- och molekylfysik och optik