Photonic analog-to-digital converter using Mach-Zehnder modulators having identical half-wave voltages with improved bit resolution

Yang, Shuna and Wang, Chao and Chi, Hao and Zhang, Xianmin and Zheng, Shilie and Jin, Xiaofeng and Yao, Jianping (2009) Photonic analog-to-digital converter using Mach-Zehnder modulators having identical half-wave voltages with improved bit resolution. Applied Optics, 48 (22). pp. 4458-4467. ISSN 0003-6935. (doi:https://doi.org/10.1364/AO.48.004458) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1364/AO.48.004458

Abstract

A novel approach to perform photonic analog-to-digital conversion with improved bit resolution is proposed and investigated. Instead of using Mach–Zehnder modulators (MZMs) with geometrically-scaled half-wave voltages, the MZMs in the approach have identical half-wave voltages, which greatly simplifies the implementation. To improve the bit resolution without increasing the number of MZMs, each MZM is connected with multiple comparators having multiple thresholds. The quantization and encoding are performed based on the symmetrical number system (SNS) technique. Three new quantization and encoding schemes based on the SNS are proposed and demonstrated. A 4 bit photonic analog-to-digital conversion based on the given schemes is investigated. For the given schemes, two MZMs are needed with the numbers of comparators being 14, 16, and 9, respectively. Numerical simulations and experiments are performed. The effectiveness of the proposed schemes is verified.

Item Type: Article
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: Tina Thompson
Date Deposited: 28 Oct 2013 15:56 UTC
Last Modified: 30 Oct 2013 10:34 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/35727 (The current URI for this page, for reference purposes)
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