Interferometric Analog-to-Digital Conversion Scheme
Journal article, 2005

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 $2pi $-periodicity that in comparison with conventional flash ADCs relaxes the demands on the comparators and allows unwrapping of the output for higher resolution.

photonic sampling

photonic analog-to-digital converter (ADC)

error correction coding

optical interferometry

electrooptical modulation

Analog–digital conversionm

phase modulation

Author

Johan Stigwall

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Sheila Galt

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

IEEE Photonics Technology Letters

Vol. 17 2 468 - 470

Subject Categories

Physical Sciences

Electrical Engineering, Electronic Engineering, Information Engineering

More information

Created

10/6/2017