在掺铒光纤中直接观测慢光和超光速信号的演化  

Direct Observation of Signal Evolution of Slow and Fast Light in Erbium-Doped Optical Fiber

作　　者：王号[1] 掌蕴东[1] 叶建波[1] 田赫[1] 王楠[1] 马磊[1] 袁萍[1] 

机构地区：[1]哈尔滨工业大学可调谐激光技术国家级重点实验室,黑龙江哈尔滨150080

出　　处：《光学学报》2009年第7期1938-1942,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60272075;60478014;6087806);国家863计划(2007AA122112)资助项目

摘　　要：最近几年中,慢光和超光速的研究取得了很多进展。慢光和超光速产生的物理机制作为慢光和超光速研究领域的一个重要方面也吸引了研究者的关注。设计了一个新颖的实验,在掺铒光纤中观测了慢光和超光速信号的演化。分别在慢光(0<υg《c,c是真空中的光速,υg为光传播的群速度)和超光速(υg<0)情况下,直接观测了不同波形调制信号通过掺铒光纤的波形变化情况。实验观测和理论分析说明掺铒光纤对周期性调制信号的非对称的吸收和放大是在掺铒光纤中产生慢光和超光速的物理机制。In recent years, researches about the controllable group velocity of light propagation had made many progresses. The mechanism of the generation of slow and fast light, as one of the most important aspects in the research of slow and fast light, had attracted great interest in researchers. In this letter, the authors described a simple experiment for the tracing of light signals in erbium-doped fiber （EDF） at the optical communication wavelength. We have, directly, observed the evolution of slow and fast signals with different waveforms that travel in EDF. Through tracing the wave evolution, when slow light （0〈 vg 〈〈c, cis the speed of light in vacuum, vg is the group velocity of light） or fast light （ vg〈0） was got in EDF, we concluded that asymmetrical absorption and amplification on the periodical signal could account for the generation of slow and fast light in EDF.

关 键 词：非线性光学 慢光 信号演化 掺铒光纤 

分 类 号：O436.2[机械工程—光学工程]