Performance of a photonic oversampled sigma-delta quantiser

Bradley A. Clare; Kerry A. Corbett; Kenneth J. Grant

doi:10.1117/12.604263

24 May 2005 Performance of a photonic oversampled sigma-delta quantiser

Bradley A. Clare, Kerry A. Corbett, Kenneth J. Grant

Proceedings Volume 5814, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications; (2005) https://doi.org/10.1117/12.604263
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

In an increasingly digital world, the need for high speed and high fidelity analog-to-digital (A/D) converters is paramount. Performance improvements in electronic A/Ds have not kept pace with demand, hence the need to consider alternative technologies. One such technology is photonics, as it takes advantage of optical sampling, high speed optical switches and low cross-talk interconnects. Optical sampling derives its advantage from the application of ultra low timing jitter (<100fs) mode locked lasers utilised to provide high speed clock pulses. In this paper we report on our investigation into the feasibility and simulated performance of a photonic sigma-delta quantiser. The first-order sigma-delta architecture requires the functional elements of a subtractor, comparator and delay. We constructed optoelectronic versions of a subtractor and a comparator using self-electro-optic devices (SEED) based upon multiple quantum well (MQW) p-i-n devices. Comparator and subtractor operation were experimentally demonstrated and the inclusion of gain was shown to improve the subtractor performance to that demanded by the sigma-delta architecture. A numerical simulation based upon experimentally derived data was performed to include the non-idealities of the comparator and subtractor. A photonic implementation of the sigma-delta was proposed and simulated to demonstrate the feasibility of the architecture design and to determine the signal-to-quantisation-noise ratio (SQNR) as a function input amplitude. A peak SQNR of 54dB was obtained for an oversampling ratio of 100.

Citation Download Citation

Bradley A. Clare, Kerry A. Corbett, and Kenneth J. Grant "Performance of a photonic oversampled sigma-delta quantiser", Proc. SPIE 5814, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications, (24 May 2005); https://doi.org/10.1117/12.604263

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available