半导体光放大器(SOA ) 是光的在光开关和光缓冲区中放大设备和关键部分。他们大部分在通讯系统被使用。线宽改进因素是为 SOA 的一个重要参数。一个方法被建议与 Sagnac 干涉仪测量线宽改进因素。生气阶段调整(XPM ) 和生气获得调整(XGM ) 在 SOA 共存。到 XGM 和干扰扑灭比率的线宽改进因素的量的关系被给。试验性的结果显示线宽改进因素的价值从 5 变化。13 ~ 6。24 当电流从 130 妈变化到 240 妈时。CLC 数字 O4-34 文件代码 A 由中国(资助号码 60272010 ) 和公民 863 工程(号码 2002AA122510 ) 的国家自然科学基础支持了
Semiconductor optical amplifiers (SOA) are optical amplifying devices and key parts in optical switches and optical buffers, They are largely used in communication system. Linewidth enhancement factor is an important parameter for SOA. A method is proposed to measure the linewidth enhancement factor with Sagnac interferometer. Cross phase modulation (XPM) and cross gain modulation (XGM) coexist in SOA. The quantitative relation of linewidth enhancement factor to XGM and the interference extinction ratio is given. The experimental results indicate that the value of linewidth enhancement factor changes from 5.13 to 6.24 when the electric current varies from 130 mA to 240 mA.