摘要
提出一种新型四倍频技术用于单边带光载毫米波信号的产生。该技术使用一个双平行马赫曾德尔调制器(DPMZM)实现四倍频的单边带调制,通过微波移相和双平行马赫曾德尔(MZ)调制器偏置点控制,产生出包含载波边带和两个二阶边带的光谱,用光滤波器滤除光载波后得到频率为四倍微波本振频率的光载毫米波信号。基于上述技术,搭建了光载射频(RoF)传输实验系统,该RoF系统用10GHz微波源产生了40GHz的光载毫米波并承载了1 Gb/s的基带数据。实验结果表明,光载毫米波信号经20km标准单模光纤传输后,功率代价仅为0.8dB。
A novel scheme is demonstrated to generate single-sideband optical millimeter-wave signals employing frequency quadrupling.A dual parallel Mach-Zehnder modulator(DPMZM) is used to achieve frequency quadrupling.With electrical phase shifting and bias control,the DPMZM generates optical signal comprised of a carrier and two two-order side-bands.After removing the optical carrier with an optical filter,a quadruple optical millimeter-wave signal is generated.An experimental radio-over-fiber(RoF) transmission system is built.40 GHz optical millimeter-wave signal with 1 Gb/s pseudorandom bit sequence data is transsmited,whose power penalty is only 0.8 dB over 20 km single-mode fiber(SMF).
出处
《光学学报》
EI
CAS
CSCD
北大核心
2010年第12期3386-3390,共5页
Acta Optica Sinica
基金
国家自然科学基金(60736003
61025004)
国家863计划(2009AA01Z222
2007AA01Z256)
国家973计划(2006CB302805)资助课题
关键词
光通信
上变频
光学单边带调制
光载射频
optical communications
up conversion
optical single-sideband(OSSB) modulation
radio-over-fiber