High extinction ratio Mach-Zehnder modulator applied to a highly stable optical signal generator
High extinction ratio Mach-Zehnder modulator applied to a highly stable optical signal generator
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DOI：
10.1109/tmtt.2007.904070
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发表时间：
2007-09-01
影响因子：
4.3
通讯作者：
Lzutsu, Masayuki
中科院分区：
文献类型：
--
作者：
Kiuchi, Hitoshi;Kawanishi, Tetsuya;Lzutsu, Masayuki
近年来，光调制器的研究取得了显著的进展。本文讨论了将高消光比光调制器应用于高稳定度、高频率（100 GHz以上）光参考信号发生器的可能性。高频参考信号是由一个高稳定性的光学双音发生器产生的，用于高速通信和天文应用。产生两个光信号的一种方法是使用用于反馈控制的光学锁相环从一对激光源产生它们;然而，光学锁相环在其操作中具有稳定性问题。光锁相方案的一个很好的替代方法是LiNbO 3马赫-曾德尔（MZ）光强度调制器，它能够通过将正弦微波信号施加到输入激光信号来产生两个高度稳定的光信号（上边带和下边带分量）。这两个光信号要求相位稳定性在Allan标准偏差、振动鲁棒性和偏振保持能力方面优于10（-13）。由MZ调制器产生的两个光信号的相位稳定性估计的信号相干损失表明，光学MZ调制器具有产生高度稳定的光信号的能力。
Research into optical modulators has made remarkable progress in recent years. This paper discusses the possibility of applying the high extinction ratio optical modulator to a high-stability and high-frequency (over 100 GHz) optical reference signal generator. High-frequency reference signals are generated by a highly stable optical two-tone generator, which is used for high-rate communication and astronomical application. One method to generate two optical signals is producing them from a pair of laser sources using an optical phase-locked loop for feed back control; however, the optical phase-locked loop has a stability problem in its operation. A good alternative method to the optical phase-locked scheme is the LiNbO3 Mach-Zehnder (MZ) optical intensity modulator, which is capable of generating two highly stable optical signals (upper sideband and lower sideband components) by applying a sinusoidal microwave signal to an input laser signal. The two optical signals require phase stability better than 10(-13) in the Allan standard deviation, vibration robustness, and polarization maintaining capability. The signal coherence loss estimated from the phase stability of the two optical signals generated by the MZ modulator shows that the optical MZ modulator has the ability to generate highly stable optical signals.