High frequency optoelectronic oscillators based on the optical feedback of semiconductor mode-locked laser diodes.
High frequency optoelectronic oscillators based on the optical feedback of semiconductor mode-locked laser diodes.
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DOI：
10.1364/oe.20.003268
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发表时间：
2012-01
期刊：
影响因子：
3.8
通讯作者：
M. Haji;L. Hou;A. Kelly;J. Akbar;J. Marsh;J. Arnold;C. Ironside
中科院分区：
文献类型：
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作者：
M. Haji;L. Hou;A. Kelly;J. Akbar;J. Marsh;J. Arnold;C. Ironside
光自注入反馈技术可以用来改善被动锁模半导体激光器的噪声特性。光纤电缆等外部空腔可以增加相位的记忆，从而改善定时抖动。在这项工作中，提出了一种改进的光反馈结构，使用光纤环路延迟作为锁模激光器的腔扩展。我们调查的效果作为一个函数的环路长度和反馈功率的噪声降低。众所周知的复合腔技术也被实现用于抑制由于谐波锁模效应而呈现的超模噪声伪影。利用这种方法，我们实现了迄今为止任何高频（>1 GHz）被动锁模激光器的192 Hz的低射频线宽（据作者所知），使其有希望用于高频光电振荡器的发展。
Optical self seeding feedback techniques can be used to improve the noise characteristics of passively mode-locked laser diodes. External cavities such as fiber optic cables can increase the memory of the phase and subsequently improve the timing jitter. In this work, an improved optical feedback architecture is proposed using an optical fiber loop delay as a cavity extension of the mode-locked laser. We investigate the effect of the noise reduction as a function of the loop length and feedback power. The well known composite cavity technique is also implemented for suppressing supermode noise artifacts presented due to harmonic mode locking effects. Using this method, we achieve a record low radio frequency linewidth of 192 Hz for any high frequency (>1 GHz) passively mode-locked laser to date (to the best of the authors' knowledge), making it promising for the development of high frequency optoelectronic oscillators.