Dong Jianji, Yu Yuan, Zhang Yin, Li Xiang, Huang Dexiu, Zhang Xinliang
Wuhan National Lab for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 43007, China.
Opt Express. 2011 May 23;19(11):10587-94. doi: 10.1364/OE.19.010587.
An all-optical incoherent scheme for generation of binary phase-coded ultra-wideband (UWB) signals is proposed and experimentally demonstrated. The binary phase coding is performed based on all-optical phase modulation in a semiconductor optical amplifier (SOA) and phase modulation to intensity modulation (PM-IM) conversion in a fiber delay interferometer (DI) that serves as a multichannel frequency discriminator. By locating the phase-modulated light waves at the positive and negative slopes of the DI transmission spectra, binary phase encoded UWB codes (0 and π) are generated. We also experimentally demonstrate a bipolar UWB coding system with a code length of 4, operating at 1.25 Gb/s. And the decoding is analyzed as well. Our proposed system has potential application in future high-speed UWB impulse radio over optical fiber access networks.
提出并通过实验证明了一种用于生成二进制相位编码超宽带（UWB）信号的全光非相干方案。二进制相位编码基于半导体光放大器（SOA）中的全光相位调制以及用作多通道鉴频器的光纤延迟干涉仪（DI）中的相位调制到强度调制（PM-IM）转换来执行。通过将相位调制光波定位在DI传输光谱的正斜率和负斜率处，生成二进制相位编码的UWB码（0和π）。我们还通过实验证明了一种码长为4、工作速率为1.25 Gb/s的双极性UWB编码系统。并且对解码也进行了分析。我们提出的系统在未来的高速光纤接入网络超宽带脉冲无线电中具有潜在应用。
