Reconfigurable all-optical dual-directional half-subtractor for high-speed differential phase shift keying signal based on semiconductor optical amplifiers

doi:10.1088/1674-1056/21/2/024209

Abstract All-optical digital logic elementary circuits are the building blocks of many important computational operations in future high-speed all-optical networks and computing systems. Multifunctional and reconfigurable logic units are essential in this respect. Employing the demodulation properties of delay interferometers for input differential phase shift keying signals and the gain saturation effect in two parallel semiconductor optical amplifiers, a novel design of 40 Gbit/s reconfigurable all-optical dual-directional half-subtractor is proposed and demonstrated. All output logic results show that the scheme achieves over 11=dB extinction ratio, clear and wide open eye diagram, as well as low polarization dependence (< 1 dB), without using any additional input light beam. The scheme may provide a promising candidate for future ultrafast all-optical signal processing applications.

Keywords: nonlinear optics optical communications devices semiconductor optical amplifier

Received: 01 August 2011
Revised: 08 November 2011
Accepted manuscript online:

PACS:	42.65.-k	(Nonlinear optics)
	42.79.Sz	(Optical communication systems, multiplexers, and demultiplexers?)
	42.79.Ta	(Optical computers, logic elements, interconnects, switches; neural networks)
	85.60.-q	(Optoelectronic devices)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 60877056) and the National Basic Research Program of China (Grant No. 2011CB301704).

Corresponding Authors: Dong Jian-Ji,jjdong@mail.hust.edu.cn;Zhang Xin-Liang,xlzhang@mail.hust.edu.cn
E-mail: jjdong@mail.hust.edu.cn;xlzhang@mail.hust.edu.cn

Cite this article:

Zhang Yin(张印), Dong Jian-Ji(董建绩), Lei Lei(雷蕾), and Zhang Xin-Liang(张新亮) Reconfigurable all-optical dual-directional half-subtractor for high-speed differential phase shift keying signal based on semiconductor optical amplifiers 2012 Chin. Phys. B 21 024209

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Reconfigurable all-optical dual-directional half-subtractor for high-speed differential phase shift keying signal based on semiconductor optical amplifiers

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