A Novel Approach to Realizing SSB Modulation With Optimum Optical Carrier to Sideband Ratio
A Novel Approach to Realizing SSB Modulation With Optimum Optical Carrier to Sideband Ratio
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DOI：
10.1109/lpt.2013.2260141
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发表时间：
2013-06
影响因子：
2.6
通讯作者：
Jintian Xiong;Rong Wang;T. Pu;Lin Lu;Tao Fang;Zhihu Wei;Guodan Sun;Jiling Zheng;P. Xiang
中科院分区：
文献类型：
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作者：
Jintian Xiong;Rong Wang;T. Pu;Lin Lu;Tao Fang;Zhihu Wei;Guodan Sun;Jiling Zheng;P. Xiang
提出了一种基于强光注入锁定分布反馈(DFB)激光器实现单边带(SSB)调制的新方法，并对其进行了实验验证。通过精确地调节注入比和失谐频率，获得了最佳值为0分贝的可调OCSR。为了确定最优的OCSR，进行了仿真。据我们所知，还首次测量了DFB激光器在强光注入下的增益特性。在没有任何滤波的情况下，获得了LO信号的倍频。将产生的20 GHz的单边带信号通过60 km的单模光纤进行了实验传输，实验结果表明它几乎不受光纤色散的影响。
A novel approach to realizing single sideband (SSB) modulation with optical carrier to sideband ratio (OCSR) of 0 dB, which is optimum for maximizing the transmission performance of a radio-over-fiber system, is proposed and experimentally demonstrated based on a strong optical injection-locked distributed feedback (DFB) laser. Tunable OCSR with optimum value of 0 dB is achieved by tuning the injection ratio and the detuning frequency precisely. A simulation is carried out to confirm the optimum OCSR. Gain properties of the DFB laser under strong optical injection are also measured for the first time to our knowledge. Doubled frequency of the LO signal is obtained without any filter. The generated optical SSB signal of 20 GHz is transmitted over 60-km single-mode fiber experimentally; results show it is almost not affected by the fiber chromatic dispersion.