Title

Ultrawide-Band Photonic Time-Stretch A/D Converter Employing Phase Diversity

Keywords

Fiber optics; Microwave photonics; Optical signal processing; Photonic analog-to-digital (A/D) conversion; Time stretch

Abstract

The performance of analog-to-digital converters can be greatly enhanced by preprocessing the analog signal using the photonic time-stretch technique. The analog bandwidth of a time-stretch preprocessor is limited by dispersion-induced frequency fading. In this paper, we propose and demonstrate a new implementation of the time-stretch analog-to-digital (A/D) conversion system that overcomes the bandwidth limitation. It is shown that the fading phenomenon can be mitigated by using phase diversity, and the maximum ratio combining algorithm is identified as a potential technique for maximizing the signal-to-noise-ratio. Real-time A/D conversion at 480 Gsample/s is demonstrated. © 2005 IEEE.

Publication Date

4-1-2005

Publication Title

IEEE Transactions on Microwave Theory and Techniques

Volume

53

Issue

4 I

Number of Pages

1404-1408

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TMTT.2005.845757

Socpus ID

18744392584 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/18744392584

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