We propose a flexible dual-pattern communication system based on the existing intensity modulation and direct detection system, which exploits the wavelength tuning characteristic of the distributed Bragg reflector (DBR) laser. At the transmitter side of the system, the DBR laser is wavelength tuned by the wavelength coding signal and intensity modulated by the radio frequency (RF) signal. At the receiver side, the RF signal is detected directly by photodetector 1, while the wavelength coding signal is recovered by a specific optical filter. The proposed system is theoretically analyzed and verified at the C band experimentally. We successfully obtained clear eye openings for the 10- and 25-Gb/s nonreturn-to zero signal. The waveform graphs of the 10- and 100-kHz wavelength coding signal were also measured. The two transmission patterns did not interfere with each other no matter in the back-to-back or 5 km case.

中文翻译：

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在强度调制和直接检测系统中使用DBR激光器的双模式通信系统

我们提出了一种基于现有强度调制和直接检测系统的灵活双模式通信系统，该系统利用了分布式布拉格反射器 (DBR) 激光器的波长调谐特性。在系统的发射器侧，DBR 激光器通过波长编码信号进行波长调谐，并通过射频 (RF) 信号进行强度调制。在接收端，RF信号由光电探测器1直接检测，而波长编码信号由特定的光滤波器恢复。所提出的系统在C波段进行了理论分析和实验验证。我们成功地获得了 10 Gb/s 和 25 Gb/s 非归零信号的清晰眼图。还测量了 10 和 100 kHz 波长编码信号的波形图。