Open AccessImplementation of a Reconfigurable Optical Logic Gate Using a Single I/Q Modulator With Direct Detection
Author(s) -
Xianfeng Tang,
Yaxue Zhai,
Lu Sun,
Yiqiao Feng,
Donghe Zhao,
Xiaoguang Zhang,
Lixia Xi,
Wenbo Zhang
Publication year - 2016
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2016.2550318
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
We propose and investigate a new scheme to realize all-optical logic gates using a single I/Q modulator with direct detection. Both intensity and phase of the optical signal are utilized to represent the four different states of two binary inputs, whereas direct detection is used to map the four states to the corresponding binary output. This structure is very simple and has the potential to reach high speed. All of the basic logic gates can be implemented by adjusting the bias voltages of the two arms, peak-peak voltages of the driving signals, and the phase shift. Experiments are successfully carried out to realize all six basic logic gates at the data rate up to 10 Gb/s with eye diagrams clearly observed. Extinction ratios (ERs) of the output signals are increased for all these logic gates, compared with the original input signals. ER decreases when increasing the data rate from 1 to 10 Gb/s. Up to 24 logic gates can be implemented by using a single I/Q modulator.