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An improved photonic analog-to-digital conversion scheme using Mach–Zehnder modulators with identical half-wave voltages
- Source :
- Optics Communications. 425:157-160
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- An improved photonic analog-to-digital conversion (ADC) scheme using Mach–Zehnder modulators (MZMs) is proposed and demonstrated. In the approach, all the MZMs have the same electrode length, which eliminates the need of MZMs with very low half-wave voltages as in the scheme using MZM array with geometrically-scaled half-wave voltages. An electric circuit is employed to realize linear combinations of the detected signals (including subtraction and addition). By properly biasing the MZMs and setting the thresholding voltages in the comparators, a digital Gray-code output is obtained. The proposed ADC scheme can effectively improve the bit resolution compared with the previous photonic ADCs based on the phase-shifting technique. Theoretical analysis and proof-of-concept experiments are presented to verify the feasibility of the proposed approach.
- Subjects :
- Physics
Comparator
business.industry
Biasing
02 engineering and technology
Mach–Zehnder interferometer
01 natural sciences
Thresholding
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
010309 optics
020210 optoelectronics & photonics
Optics
0103 physical sciences
0202 electrical engineering, electronic engineering, information engineering
Electronic engineering
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Photonics
Linear combination
business
Electronic circuit
Voltage
Subjects
Details
- ISSN :
- 00304018
- Volume :
- 425
- Database :
- OpenAIRE
- Journal :
- Optics Communications
- Accession number :
- edsair.doi...........e69e8a395ce515a524bb5f4ca1091eaf