Interferometric Analog-to-Digital Conversion Scheme
Artikel i vetenskaplig tidskrift, 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


Johan Stigwall

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Sheila Galt

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

IEEE Photonics Technology Letters

Vol. 17 468 - 470



Elektroteknik och elektronik