Department of Electronic Engineering and Center for Advanced Research in Photonics, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China.
Opt Lett. 2013 Mar 15;38(6):968-70. doi: 10.1364/OL.38.000968.
We demonstrate reconfigurable photonic ultrawideband (UWB) pulse generation by injecting a phase-modulated optical wave into a semiconductor laser. By adjusting the injection power level and phase modulation depth, the photonic UWB generator is capable of generating either a single-optical-carrier monocycle or power-efficient UWB pulses. A UWB pulse with spectral power efficiency (SPE) of 36.10% has been achieved by optimizing the injection parameters. Transmission in an 8.4 km single mode fiber results in a degradation of SPE to 27.55% without significant pulse distortion.
我们通过将相位调制光注入半导体激光器来演示可重构的光子超宽带 (UWB) 脉冲生成。通过调整注入功率水平和相位调制深度，光子 UWB 发生器能够产生单光载波单周期或高能效 UWB 脉冲。通过优化注入参数，实现了光谱功率效率 (SPE) 为 36.10%的 UWB 脉冲。在 8.4 公里单模光纤中传输会导致 SPE 降低到 27.55%，但脉冲没有明显失真。
