30 Gsample/s 4-bit time-stretch analog-to-digital converter

Author

Bhushan, A.S. ; Kelkar, P. ; Coppinger, F. ; Jalali, B.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

fYear

2000

fDate

7-12 May 2000

Firstpage

623

Lastpage

624

Abstract

Summary form only given.Photonic time stretch preprocessing (TSP) has been proposed as a means to enhance the performance of electronic ADCs. This concept is based on the premise that if the analog signal can be stretched in time free of distortion, then the effective sampling rate and the input bandwidth of the ADC is increased. The technique is best suited for time-limited analog signals, such as those encountered in pulsed radars. In this paper we demonstrate complete time-stretch ADC with 30 Gsample/s sampling rate, and 4 effective number of bits resolution realized over a 4 GHz bandwidth. The system consists of a photonic TSP and a commercially available electronic digitizer with 8 Gsample/s sampling rate and 1.5 GHz bandwidth.

Keywords

analogue-digital conversion; chirp modulation; electro-optical modulation; microwave photonics; optical information processing; signal sampling; 4 GHz; 4 bit; Mach-Zehnder modulator; chirped optical pulse; complete time-stretch ADC; effective sampling rate; electronic digitizer; input bandwidth; near-transform-limited pulse; photonic time stretch preprocessing; time-limited analog signals; Analog-digital conversion; Computer interfaces;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on

Conference_Location

San Francisco, CA, USA

Print_ISBN

1-55752-634-6

Type

conf

DOI

10.1109/CLEO.2000.907475

Filename

907475