Linearization of 1.3-/spl mu/m MQW electroabsorption modulators using an all-optical frequency-insensitive technique
Linearization of 1.3-/spl mu/m MQW electroabsorption modulators using an all-optical frequency-insensitive technique
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DOI：
10.1109/68.681285
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发表时间：
1998-07
影响因子：
2.6
通讯作者：
K. K. Loi-K.;J. Hodiak;X. Mei;C. Tu;W.S.C. Chang
中科院分区：
文献类型：
--
作者：
K. K. Loi-K.;J. Hodiak;X. Mei;C. Tu;W.S.C. Chang
利用量子限制斯塔克效应对波长的依赖性，提出了一种新型的用于分立多量子阱电吸收调制器的全光线性化技术。用于特定阶非线性的校正信号由同一调制器在失谐光波长处产生，通过在光电检测器处的相干RF复合来消除非期望阶非线性失真。这种双波长方法简单，对微波副载波频率不敏感。在10 GHz的三阶非线性失真和8 dB的增加，在suboctave链路的动态范围内实现了显着的30 dB的减少实验。
A novel all-optical linearization technique has been developed for discrete multiquantum-well electroabsorption modulators by exploiting the wavelength dependence of the quantum-confined Stark effect. The correcting signal for a particular order of nonlinearity is generated by the same modulator at a detuned optical wavelength, canceling the undesired order of nonlinear distortion via coherent RF recombination at the photodetector. This dual-wavelength approach is simple and insensitive to the microwave subcarrier frequency. A dramatic 30-dB reduction in the third-order nonlinear distortion at 10 GHz and 8-dB increase in the suboctave link dynamic range were achieved experimentally.