Sensors of Encoding and Decoding Based on Superstructure Fiber Bragg Gratings Modulated in Amplitude and Phase for applications in systems OCDMA - 63 chip

IF 2.3 4区物理与天体物理 Q2 OPTICS Fiber and Integrated Optics Pub Date : 2019-11-02 DOI:10.1080/01468030.2019.1701752

Antonio Francisco Gomes Furtado Filho, Juscelino Sales Chaves, José Rubens Rodrigues de Sousa, Giannini Italino Alves Vieira, Marcio de Melo Freire, A. S. Bezerra Sombra

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引用次数: 2

Abstract

ABSTRACT In this paper, we report a series of incremental optical coding and decoding sensors using their respective fiber Bragg grating superstructure (SS-FBG). We performed a comparative study of the encoding/decoding bipolar and unipolar sequences using these grids. The modulation in the refractive index can be changed by discrete jumps in phase (± π) or variations in the amplitude of the specific grid regions. The aim of this study was to evaluate the performance of SS-FBG in autocorrelation and cross-correlation studies. This approach allows us to measure the quality of unipolar and bipolar coding and understand how the decoded signal can be affected by the presence of multiple users on the network. Each generated code is a Gold sequence for bipolar code 63chips and an M sequence for unipolar code 63chips. We use five different codes to represent the users, and we calculate through the signal/noise power ratio (SRNe) the energy used by a certain signal to interfere with a neighboring signal. Our results emphasize the accuracy and flexibility of Bragg gratings (FBG-SS) and showed that this technology is promising not only to Optical Code Division Multiple Access (OCDMA) but also for an extended variety of other optical processing applications.

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基于超结构光纤光栅的调幅调相编解码传感器在OCDMA - 63芯片系统中的应用

在本文中，我们报道了一系列使用各自的光纤布拉格光栅上层结构(SS-FBG)的增量光编码和解码传感器。我们使用这些网格对双极和单极序列的编码/解码进行了比较研究。折射率的调制可以通过相位(±π)的离散跳变或特定栅格区域振幅的变化来改变。本研究的目的是评估SS-FBG在自相关和相互相关研究中的性能。这种方法使我们能够测量单极和双极编码的质量，并了解解码信号如何受到网络上多个用户的影响。每个生成的代码是双极代码63chips的Gold序列和单极代码63chips的M序列。我们使用五种不同的编码来表示用户，并通过信噪比(SRNe)计算某个信号对相邻信号的干扰所使用的能量。我们的研究结果强调了布拉格光栅(FBG-SS)的准确性和灵活性，并表明该技术不仅可以用于光码分多址(OCDMA)，还可以用于扩展各种其他光学处理应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fiber and Integrated Optics 物理-光学

CiteScore

3.40

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Fiber and Integrated Optics , now incorporating the International Journal of Optoelectronics, is an international bimonthly journal that disseminates significant developments and in-depth surveys in the fields of fiber and integrated optics. The journal is unique in bridging the major disciplines relevant to optical fibers and electro-optical devices. This results in a balanced presentation of basic research, systems applications, and economics. For more than a decade, Fiber and Integrated Optics has been a valuable forum for scientists, engineers, manufacturers, and the business community to exchange and discuss techno-economic advances in the field.