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半导体纳米晶体PbSe量子点光纤放大器
引用本文:程成,张航.半导体纳米晶体PbSe量子点光纤放大器[J].物理学报,2006,55(8):4139-4144.
作者姓名:程成  张航
作者单位:浙江工业大学应用物理系,杭州 310023
基金项目:教育部全国优秀博士学位论文作者专项基金
摘    要:提出了一种新的光纤放大器——量子点光纤放大器(QDFA). 利用人工纳米晶体PbSe作为掺杂剂,通过解二能级系统速率方程和光传播方程,应用遗传算法和“逆方法",计算得到了PbSe-QDFA的最佳掺杂浓度、抽运波长和光纤长度,并得到了增益、带宽和噪声系数. 与常规的掺铒光纤放大器相比较,PbSe-QDFA的带宽和噪声系数等关键指标均有明显提高,并可在长波长(约1630nm)区工作. 反演出极限QDFA所需的理想辐射和吸收截面. 理论模拟结果表明,在理想辐射和吸收截面下,QDFA的带宽极宽,噪声系数可接近量子 关键词: 量子点 光纤放大器 带宽 噪声

关 键 词:量子点  光纤放大器  带宽  噪声
文章编号:1000-3290/2006/55(08)/4139-06
收稿时间:06 10 2005 12:00AM
修稿时间:2005-06-102006-04-20

A semiconductor nanocrystal PbSe quantum dot fiber amplifier
Cheng Cheng,Zhang Hang.A semiconductor nanocrystal PbSe quantum dot fiber amplifier[J].Acta Physica Sinica,2006,55(8):4139-4144.
Authors:Cheng Cheng  Zhang Hang
Institution:Department of Applied Physics, Zhejiang University of Technology , Hangzhou 310023, China
Abstract:A novel kind of fiber amplifier——quantum dot doped fiber amplifier (QDFA) is presented. Using semiconductor nanocrystal PbSe as a dopant, the gain bandwidths of the PbSe-QDFA are simulated by solving the rate equation and the light propagation equation in a two-level system, applying a genetic algorithm combined with an “inversing method”. Comparing with conventional erbium-doped fiber amplifiers available, there is evidence to show that characteristics of the PbSe-QDFA are obviously advantageous in respect of bandwidth and noise, especially on long-waelength band. Furthermore, the ideal emission-absorption cross-sections of the quantum dot are determined by utilizing the genetic algorithm. Under such ideal cross-sections, the QDFA possesses with the performance of ultra-bandwidth and low noise figure near a quantum limit.
Keywords:quantum dot  fiber amplifier  bandwidth  noise figure
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