Investigation of noise effects of CMS laser lineshape and frequency fluctuations

2011 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA) Pub Date : 2011-12-01 DOI:10.1109/ISBEIA.2011.6088859

Saktioto, Muhamad Hamdi, D. Irawan, J. Zainal, J. Ali

{"title":"Investigation of noise effects of CMS laser lineshape and frequency fluctuations","authors":"Saktioto, Muhamad Hamdi, D. Irawan, J. Zainal, J. Ali","doi":"10.1109/ISBEIA.2011.6088859","DOIUrl":null,"url":null,"abstract":"Lineshape and frequency fluctuations actually cause the optical field of current modulation semiconductor laser (CMS) laser beam to deviate from a pure sine wave [1]. This paper investigates the lineshape of a CMS laser for two distinct types of frequency noise. In the first case the investigation analyzes on the low-pass filter, the frequency noise level is a constant δo below a cutoff frequency but zero above this threshold. In the second case on high-pass filter the frequency noise level is a constant δo above a cutoff frequency but zero below this threshold. Investigations observed inspire us to focus for separation of the frequency noise spectrum into two regions wherein due to the effect of noise on the lineshape is radically different in the slow modulation area in a left side of the diagonal line where the noise contributes to the laser linewidth, with a Gaussian shape, and the other one the fast modulation area in a right side of the diagonal line, where the noise contributes only to the wings of the line (sidebands) and not to the linewidth, thus transforming the lineshape from Gaussian to Lorentzian.","PeriodicalId":358440,"journal":{"name":"2011 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISBEIA.2011.6088859","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 2

Abstract

Lineshape and frequency fluctuations actually cause the optical field of current modulation semiconductor laser (CMS) laser beam to deviate from a pure sine wave [1]. This paper investigates the lineshape of a CMS laser for two distinct types of frequency noise. In the first case the investigation analyzes on the low-pass filter, the frequency noise level is a constant δo below a cutoff frequency but zero above this threshold. In the second case on high-pass filter the frequency noise level is a constant δo above a cutoff frequency but zero below this threshold. Investigations observed inspire us to focus for separation of the frequency noise spectrum into two regions wherein due to the effect of noise on the lineshape is radically different in the slow modulation area in a left side of the diagonal line where the noise contributes to the laser linewidth, with a Gaussian shape, and the other one the fast modulation area in a right side of the diagonal line, where the noise contributes only to the wings of the line (sidebands) and not to the linewidth, thus transforming the lineshape from Gaussian to Lorentzian.

查看原文本刊更多论文

CMS激光线形和频率波动的噪声效应研究

线形和频率波动实际上会导致电流调制半导体激光器(CMS)光束的光场偏离纯正弦波[1]。本文研究了两种不同类型的频率噪声下CMS激光器的线形。在第一种情况下，调查分析了低通滤波器，频率噪声电平在截止频率以下为常数δ 0，但在该阈值以上为零。在高通滤波器的第二种情况下，频率噪声电平在截止频率以上为常数δ 0，但在该阈值以下为零。调查观察启发我们专注的分离频率噪声频谱分为两个区域,由于噪声的影响在缓慢lineshape是完全不同的调制区域左侧的对角线的噪音会导致激光线宽,以高斯形状,和另一个快速调制区域的右边对角线,在噪声贡献才行(显然)的翅膀而不是线宽,从而将线形从高斯线形转换为洛伦兹线形。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2011 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA)

自引率

0.00%

发文量