Optical signal processing based on semiconductor optical amplifier and tunable delay interferometer

doi:10.1007/s12200-011-0143-z

Front Optoelec Chin

2011, Vol. 4

Issue (3) : 308-314 https://doi.org/10.1007/s12200-011-0143-z

RESEARCH ARTICLE

Optical signal processing based on semiconductor optical amplifier and tunable delay interferometer

Xiaofan ZHAO, Caiyun LOU(

), Yanming FENG

Tsinghua National Laboratory for Information and Science Technology/State Key Laboratory on Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

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Abstract

In this paper, several applications in all-optical signal processing based on a semiconductor optical amplifier (SOA) and variable delayed interferometers (DIs) have been experimentally demonstrated. Wavelength converter based on a nonlinear polarization switch (NPS) and a DI is proposed and presented for the wavelength conversion of nonreturn-to-zero (NRZ) signals. An all-optical nonreturn-to-zero to return-to-zero (NRZ-to-RZ) format converter with tunable duty cycles is achieved by the DI with variable delays. The 40 Gb/s reconfigurable optical OR/NOR gate in a single SOA, followed a tunable optical bandpass filter (OBF) and a DI, optical 2R regeneration using an SOA-DI are investigated. It is found that this combinative realization of filters has been endowed with great flexibility and quality for 40 Gb/s optical logic and 2R regeneration.

Keywords all-optical signal processing semiconductor optical amplifier delayed interferometer wavelength conversion format converter 2R regeneration

Corresponding Author(s): LOU Caiyun,Email:lcy6266@gmail.com

Issue Date: 05 September 2011

Cite this article:

Xiaofan ZHAO,Caiyun LOU,Yanming FENG. Optical signal processing based on semiconductor optical amplifier and tunable delay interferometer[J]. Front Optoelec Chin, 2011, 4(3): 308-314.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-011-0143-z
https://academic.hep.com.cn/foe/EN/Y2011/V4/I3/308

Fig.1 Experimental setup of WC for NRZ systems

Fig.2 (a) BER curves of back-to-back signal and wavelength converted signals using NPS and NPS-DI; (b) BER results of source and converted signals at the output of NPS and of NPS-DI after transmission

Fig.3 Experimental setup of NRZ-to-RZ format conversion

Fig.4 BER performance and eye diagrams of converted signal with different DI delays. (a) 10.2 ps; (b) 15 ps; (c) 19.7 ps

Fig.5 BER performance and eye diagrams of converted signal before and after transmission

Fig.6 Experimental setup of reconfigurable logic gate

Fig.7 Waveforms and eye diagrams for input data and logic outputs. (a) A; (b) B; (c) OR gate with DI only; (d) OR gate with pulse reshaping filter; (e) NOR gate

Fig.8 Eye diagrams. (a) Degraded signal; (b) after 2R; (c) BER performance

Fig.9 Eye diagrams. (a) and (d) Input degraded signals; (b) and (e) after 2R signals with DI only; (c) and (f) with blue-shifted optical filtering

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