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Interferometric Analog-to-Digital Conversion Scheme

Johan Stigwall (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Sheila Galt (Institutionen för mikroteknologi och nanovetenskap, Fotonik)
IEEE Photonics Technology Letters Vol. 17 (2005), 2, p. 468 - 470.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Analog–digital conversionm, electrooptical modulation, error correction coding, optical interferometry, phase modulation, photonic analog-to-digital converter (ADC), photonic sampling



Denna post skapades 2006-08-29.
CPL Pubid: 6629

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Fotonik

Ämnesområden

Fysik
Elektroteknik och elektronik

Chalmers infrastruktur

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Photonic Techniques for Real-Time Analog-to-Digital Conversion