Even-order harmonic cancellation for off-quadrature biased Mach-Zehnder modulator with improved RF metrics using dual wavelength inputs and dual outputs.
Even-order harmonic cancellation for off-quadrature biased Mach-Zehnder modulator with improved RF metrics using dual wavelength inputs and dual outputs.
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DOI：
10.1364/oe.17.009028
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发表时间：
2009-05
期刊：
影响因子：
3.8
通讯作者：
P. Devgan;J. Diehl;V. Urick;C. Sunderman;K. Williams
中科院分区：
文献类型：
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作者：
P. Devgan;J. Diehl;V. Urick;C. Sunderman;K. Williams
我们提出了一种使用双输出马赫-曾德尔调制器 (MZM) 的技术，该调制器具有两个波长输入，一个在低偏置下运行，另一个在高偏置下运行，以便消除模拟光链路中不需要的偶次谐波。通过使用双输出 MZM，该技术允许将两个抑制的光载波传输到接收器。结合光放大和平衡差分检测，基波射频功率提高2dB，同时偶次谐波降低47dB。 RF 噪声系数和三阶无杂散动态范围 (SFDR(3)) 分别改善了 5.4 dB 和 3.6 dB。使用波长敏感的低 V(pi) MZM 可以使两个波长在 10 MHz 至 100 MHz 频段内彼此相差 5.5 nm 以内，在 1 GHz 频段内相差 10 nm 以内。
We present a technique using a dual-output Mach-Zehnder modulator (MZM) with two wavelength inputs, one operating at low-bias and the other operating at high-bias, in order to cancel unwanted even-order harmonics in analog optical links. By using a dual-output MZM, this technique allows for two suppressed optical carriers to be transmitted to the receiver. Combined with optical amplification and balanced differential detection, the RF power of the fundamental is increased by 2 dB while the even-order harmonic is reduced by 47 dB, simultaneously. The RF noise figure and third-order spurious-free dynamic range (SFDR(3)) are improved by 5.4 dB and 3.6 dB, respectively. Using a wavelength sensitive, low V(pi) MZM allows the two wavelengths to be within 5.5 nm of each other for a frequency band from 10 MHz to 100 MHz and 10 nm for 1 GHz.