학술논문
Interferometric analog-to-digital conversion scheme
Document Type
Periodical
Author
Source
IEEE Photonics Technology Letters IEEE Photon. Technol. Lett. Photonics Technology Letters, IEEE. 17(2):468-470 Feb, 2005
Subject
Language
ISSN
1041-1135
1941-0174
1941-0174
Abstract
A novel interferometric analog-to-digital converter (ADC) scheme for real-time conversion at multiple-gigahertz bandwidth is presented and theoretically analyzed. The input analog signal is applied as an optical phase modulation in one of the arms of a Mach-Zehnder interferometer and the digital output is obtained in encoded form as a set of optical intensities in the interference pattern. Particular benefits of the proposed device are its simple design which facilitates integration, the extremely high bandwidth, and the inherent 2/spl pi/-periodicity that in comparison with conventional flash ADCs relaxes the demands on the comparators and allows unwrapping of the output for higher resolution.