Yang L G, Sung J Y, Chow C W, Yeh C H, Cheng K T, Shi J W, Pan C L
Opt Express. 2014 Oct 20;22(21):26092-7. doi: 10.1364/OE.22.026092.
We demonstrate experimentally Manchester (MC) coding based W-band (75 - 110 GHz) radio-over-fiber (ROF) system to reduce the low-frequency-components (LFCs) signal distortion generated by two independent low-cost lasers using spectral shaping. Hence, a low-cost and higher performance W-band ROF system is achieved. In this system, direct-beating of two independent low-cost CW lasers without frequency tracking circuit (FTC) is used to generate the millimeter-wave. Approaches, such as delayed self-heterodyne interferometer and heterodyne beating are performed to characterize the optical-beating-interference sub-terahertz signal (OBIS). Furthermore, W-band ROF systems using MC coding and NRZ-OOK are compared and discussed.
我们通过实验演示了基于曼彻斯特（MC）编码的W波段（75 - 110 GHz）光纤无线（ROF）系统，该系统利用频谱整形来减少由两个独立低成本激光器产生的低频分量（LFC）信号失真。因此，实现了一种低成本、高性能的W波段ROF系统。在该系统中，使用两个无频率跟踪电路（FTC）的独立低成本连续波（CW）激光器直接拍频来产生毫米波。采用诸如延迟自外差干涉仪和外差拍频等方法来表征光拍频干涉亚太赫兹信号（OBIS）。此外，还对使用MC编码和非归零开关键控（NRZ - OOK）的W波段ROF系统进行了比较和讨论。
