Contribution of Laser Frequency and Power Fluctuations to the Microwave Phase Noise of Optoelectronic Oscillators
Contribution of Laser Frequency and Power Fluctuations to the Microwave Phase Noise of Optoelectronic Oscillators
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DOI：
10.1109/jlt.2010.2064230
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发表时间：
2010-08
影响因子：
4.7
通讯作者：
K. Volyanskiy;Y. Chembo;L. Larger;E. Rubiola
中科院分区：
文献类型：
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作者：
K. Volyanskiy;Y. Chembo;L. Larger;E. Rubiola
光电振荡器是一种微波振荡器，其中谐振腔被携带强度调制激光束的光纤延迟线代替。我们考虑的频率和功率波动的一个标准的DFB电信激光器，我们调查的相位噪声产生的微波与光电振荡器的影响。我们提出了一个理论研究，显示这两个激光波动转换成相位噪声的输出微波。该理论预测，功率噪声对微波相位噪声的贡献较小，而波长波动通过几公里长的光纤延迟线的色散对相位噪声的贡献较大。我们通过测量半导体激光器的相对强度噪声和光频噪声，证实了这一理论的有效性，后来被用于微波产生。我们表明，使用零色散光纤延迟线可以导致相位噪声性能的10 dB的改善，相对于使用标准单模光纤的情况。
An opto-electronic oscillator is a microwave oscillator in which the resonator is replaced with an optical fiber delay-line carrying an intensity-modulated laser beam. We consider the frequency and power fluctuations of a standard DFB telecom laser, and we investigate their effect on the phase noise of microwaves generated with opto-electronic oscillators. We propose a theoretical study showing how these two laser fluctuations are converted into phase noise in the output microwave. This theory predicts that the power noise should have a minor contribution to microwave phase noise, while the wavelength fluctuations should strongly contribute to phase noise via the chromatic dispersion of the few kilometers long optical fiber delay line. We have experimentally confirmed the validity of this theory by measuring the relative intensity noise and the optical frequency noise of a semiconductor laser, which has later been used for microwave generation. We show that the use of a zero-dispersion fiber delay-line can lead to a 10 dB improvement of the phase noise performance, relatively to the case were a standard single mode fiber is used.