We demonstrate a 10-GHz bandwidth digitizer with 7-effective bits of resolution and 52dB SFDR, using photonic time stretch technique. To the best of our knowledge, this is the highest resolution analog-to-digital converter (ADC) of the same bandwidth, with at least an order of magnitude higher SNR than previously achieved. This is made possible by correction of distortion due to time warps, and non-linearities due to wavelength dependent bias variation in the Mach-Zehnder modulator. We also demonstrate concatenation of 30 wavelength interleaved time segments with high fidelity on the path to achieving continuous time operation.
@article{arxiv.0807.0349,
title = {Time Warps in Photonic Time Stretch ADC and Their Mitigation},
author = {Shalabh Gupta and Bahram Jalali},
journal= {arXiv preprint arXiv:0807.0349},
year = {2008}
}
Comments
To be presented at MWP (IEEE International Microwave Photonics Conference) 2008 Conference