Photonic ultra-wideband pulse generation, hybrid modulation and dispersion-compensation-free transmission in multi-access communication systems.
Photonic ultra-wideband pulse generation, hybrid modulation and dispersion-compensation-free transmission in multi-access communication systems.
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DOI：
10.1364/oe.20.001184
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发表时间：
2012-01
期刊：
影响因子：
3.8
通讯作者：
K. Tan;Jing Shao;Junqiang Sun;Jian Wang
中科院分区：
文献类型：
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作者：
K. Tan;Jing Shao;Junqiang Sun;Jian Wang
我们提出并证明了一种方案，利用半载波抑制马赫-曾德尔调制器（MZM）和延迟干涉仪和波分复用器为基础的，可重构和多通道微分器（DWRMD）的光超宽带（UWB）脉冲产生。通过调节两个偏置电压分别改变MZM的载波抑制比和DWRMD的微分阶数，实验产生了单周期、双周期、三周期和四周期的多波长、极性和形状可切换的超宽带脉冲。利用相同的方案结构，可以方便地实现UWB脉冲的脉冲位置调制、脉冲形状调制、脉冲幅度调制和二进制相移键控调制，从而实现这四种调制方式的混合调制。因此，该方法在多波形、多调制和多址UWB-over-Fiber通信系统中具有潜在的应用价值。
We propose and demonstrate a scheme for optical ultrawideband (UWB) pulse generation by exploiting a half-carrier-suppressed Mach-Zehnder modulator (MZM) and a delay-interferometer- and wavelength-division-multiplexer-based, reconfigurable and multi-channel differentiator (DWRMD). Multi-wavelength, polarity- and shape-switchable UWB pulses of monocycle, doublet, triplet, and quadruplet are experimentally generated simply by tuning two bias voltages to modify the carrier-suppression ratio of MZM and the differential order of DWRMD respectively. The pulse position modulation, pulse shape modulation, pulse amplitude modulation and binary phase-shift keying modulation of UWB pulses can also be conveniently realized with the same scheme structure, which indicates that the hybrid modulation of those four formats can be achieved. Consequently, the proposed approach has potential applications in multi-shape, multi-modulation and multi-access UWB-over-fiber communication systems.