文档介绍：
基于拉锥微纳光纤的四波混频实验#
徐颖鑫,林星,方伟**
(浙江大学现代光学仪器国家重点实验室,浙江大学光电信息工程学系,杭州 310027)
5
10
15
20
25
30
35
40
摘要:本文利用自制的长 15cm 的亚微米拉锥微纳光纤,在飞秒脉冲光泵浦下,在短波方向,
观察到了由于微纳光纤自发四波混频产生的光子, 产率达 30000counts/s, 约为
0001counts/pulse,与泵浦失谐达到 148THz,远远避过了拉曼峰,保证了较高的纯度。这
奠定了利用微纳光纤产生高效高纯度相关光子对的基础,而因其低成本及与现代光通信网络
无缝连接的特性,为产生量子通信和量子计算中十分重要的单光子源提供了一种很诱人很有
潜力的的解决方案。
关键词:自发四波混频;拉锥微纳光纤;相关光子对
中图分类号:
Four wave mixing from a tapered micro/nanofiber
Xu Yingxin, Lin Xing, Fang Wei
(State Key Laboratory of Mordern Optical Instrumentation, Department of Optical Engineering,
Zhejiang Univerity,Hangzhou 310027)
Abstract: In this paper,we made a taped microfiber with sub-wavelength diameter and 15 cm
length. Under fs pulse pumping,we oberve spontaneous four-wave mixing in the signal (short
wavelength) regime,with a 30000 counts/s production rate, about counts/pulse and 148 Thz
detuning from the pump frequency, which improves the purity of signal by avoid the influence of
the Raman noise. Our results provide an atrractive and potential solution for generating entangled
photon pair soures,which has important applications in the munication and
putation.
Key words: spontaneous four-wave mixing,taped microfiber,correlated photon pairs
0 引言
近几十年来,量子信息领域方兴未艾,包括量子通信,量子计算,量子测量等,都是研
究的热点[1]。类似于传统计算机中的经典比特,量子比特是量子信息领域的核心和基础。作
为量子信息系统中的基本单元,量子比特的载体可以是光子、离子、原子、电子等。而以单
光子和光量子纠缠为基础的线性光学系统[2] 由