Overcoming chromatic-dispersion effects in fiber-wireless systems incorporating external modulators
Overcoming chromatic-dispersion effects in fiber-wireless systems incorporating external modulators
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DOI：
10.1109/22.618444
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发表时间：
1997-08
影响因子：
4.3
通讯作者：
Graham H. Smith;D. Novak;Zaheer Ahmed
中科院分区：
文献类型：
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作者：
Graham H. Smith;D. Novak;Zaheer Ahmed
我们展示了两种技术，以减少光纤色散的影响，光纤无线系统中，采用外部调制器。我们从理论和实验上表明，可实现的链路距离可以增加通过改变调制器的啁啾参数，以提供大的负啁啾使用双电极马赫-曾德尔调制器（MZM）偏置在正交。此外，我们表明，色散几乎可以完全克服通过实施一个简单的方法，使用双电极MZM产生单边带（SSB）调制的光载波。我们演示了一个51.8 Mb/s的伪随机比特序列（PRBS）的传输在12 GHz的80公里的标准单模光纤使用SSB发生器和测量的误码率（BER）的功率损失，由于光纤色散小于0.5 dB的BER等于10/sup-9/。
We demonstrate two techniques to reduce the effects of fiber chromatic dispersion in fiber-wireless systems incorporating external modulators. We theoretically and experimentally show that the achievable link distance can be increased by varying the chirp parameter of the modulator to give large negative chirp using a dual-electrode Mach-Zehnder modulator (MZM) biased at quadrature. In addition, we show that dispersion can be almost totally overcome by implementing a simple method using the dual-electrode MZM to generate an optical carrier with single sideband (SSB) modulation. We demonstrate the transmission of a 51.8-Mb/s pseudorandom bit sequence (PRBS) at 12 GHz over 80 km of standard single-mode fiber using the SSB generator and measure a bit-error-rate (BER) power penalty due to fiber dispersion of less than 0.5 dB for a BER equal to 10/sup -9/.