All-Optical Non-Inverted Parity Generator and Checker Based on Semiconductor Optical Amplifiers

Bingchen Han,Yu Ning,Junyu Xu,Yuanqi Gu,Rongrong Guo,Pengfei Chen,Yi Liu

doi:10.3390/app11041499

Abstract

An all-optical non-inverted parity generator and checker based on semiconductor optical amplifiers (SOAs) are proposed with four-wave mixing (FWM) and cross-gain modulation (XGM) non-linear effects. A 2-bit parity generator and checker using by exclusive NOR (XNOR) and exclusive OR (XOR) gates are implemented by first SOA and second SOA with 10 Gb/s return-to-zero (RZ) code, respectively. The parity and check bits are provided by adjusting the center wavelength of the tunable optical bandpass filter (TOBPF). A saturable absorber (SA) is used to reduce the negative effect of small signal clock (Clk) probe light to improve extinction ratio (ER) and optical signal-to-noise ratio (OSNR). For Pe and Ce (even parity bit and even check bit) without Clk probe light, ER and OSNR still maintain good performance because of the amplified effect of SOA. For Po (odd parity bit), ER and OSNR are improved to 1 dB difference for the original value. For Co (odd check bit), ER is deteriorated by 4 dB without SA, while OSNR is deteriorated by 12 dB. ER and OSNR are improved by about 2 dB for the original value with the SA. This design has the advantages of simple structure and great integration capability and low cost.

Highlights

To solve the problem of data transmission in the future communication network, alloptical signal processing (AOSP) [1] technology with larger capacity, better flexibility, and good scalability has attracted more and more attention
A new kind of 2-bit all-optical non-inverted parity generator and parity checker is proposed with four-wave mixing (FWM) and WGM effect of semiconductor optical amplifiers (SOAs), where the parity generator and checker are realized by SOAs, which enhances the integratability, configurability, and extensibility of the circuit
The experimental results confirm the feasibility of the scheme and measure the extinction ratio (ER) and optical signal-to-noise ratio (OSNR) for every output

Summary

Introduction

To solve the problem of data transmission in the future communication network, alloptical signal processing (AOSP) [1] technology with larger capacity, better flexibility, and good scalability has attracted more and more attention. There are extensive studies in all-optical signal processing and all-optical calculations, such as switches, clocked flip-flops [13], logic gates [14,15,16,17,18], subtracter and adder [19,20,21,22], decoder/encoder [20,23], and comparator [23,24] It can be seen from the research of various all-optical technologies that semiconductor optical amplifiers have broad application prospects in future optical communication systems. By adjusting the center wavelength of the tunable optical band-pass filter (TOBPF) to realize different logic gates, which provide parity and check bits for the all-optical parity generator and checker It can check whether there are errors in the data during the signal light transmission process and completes the operation in the 10 Gb/s pseudo-random return-to-zero (RZ) codes.

Principle

Parity Generator

Parity Checker

Result

Experimental Result and Discussion

Conclusions