A three-section distributed feedback laser with a 2.5 InP/air pair of distributed Bragg reflectors (DBRs) was fabricated and analyzed in terms of its microwave generation capability. A widely tunable single radio frequency (RF) signal can be detected using optical heterodyning, and the tuning range is from 2 to 45 GHz. The incorporation of the third section provides an opportunity to present the dual RF operation when three emission peaks are near to each other in the wavelength domain. The proposed design provides a 21.3% enhancement in the RF tuning range compared with the range of a two-section laser (35.29 GHz versus 42.81 GHz). The compactness of the proposed device can be useful for future radio-over-fiber applications.

中文翻译：

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单片三节DFB激光器可广泛调谐单/双射频信号。

制作了具有2.5 InP /空气对的分布式布拉格反射器（DBR）的三段式分布式反馈激光器，并对其微波产生能力进行了分析。可以使用光学外差检测可广泛调谐的单个射频（RF）信号，并且调谐范围为2至45 GHz。第三部分的合并提供了一个机会，当三个发射峰在波长域中彼此靠近时，就可以呈现双重RF操作。与两段式激光器的范围（35.29 GHz和42.81 GHz）相比，拟议的设计在RF调谐范围上提高了21.3％。所提出的设备的紧凑性对于将来的光纤无线电应用可能是有用的。