Department of Photonics, National Cheng Kung University, Tainan 701, Taiwan.
Opt Lett. 2013 May 1;38(9):1482-4. doi: 10.1364/OL.38.001482.
To distribute microwaves over fibers, optical single-sideband (SSB) modulation signals are preferred to optical double-sideband (DSB) modulation signals. This study investigates an optically injected semiconductor laser at period-one nonlinear dynamics for optical DSB-to-SSB conversion. For the operating microwave frequencies up to 40 GHz investigated in this study, the proposed system regenerates or even enhances the microwave features of an optical DSB input while converting its optical feature into SSB with an intensity difference of at least 20 dB. The bit-error ratio at 622 Mb/s is down to 10(-9) with a sensitivity improvement of up to 3 dB. The proposed system can be self-adapted to certain changes in the operating microwave frequency and can operate stably under certain fluctuations in the input optical power and frequency.
为了在光纤中分配微波，优选使用光单边带 (SSB) 调制信号而不是光双边带 (DSB) 调制信号。本研究针对光注入半导体激光器在周期-1 非线性动力学方面进行了研究，以实现光 DSB 到 SSB 的转换。在所研究的工作微波频率高达 40 GHz 的情况下，所提出的系统在将光 DSB 的光特性转换为 SSB 的同时，还对输入光信号进行再生甚至增强，其强度差至少为 20 dB。在 622 Mb/s 的比特误码率下，灵敏度提高了 3 dB，可降低至 10(-9)。该系统可以自适应工作微波频率的某些变化，并可以在输入光功率和频率的某些波动下稳定工作。
