提出了一种基于三波长注入法布里-珀罗型激光二极管(FP-LD)产生超宽带(UWB)信号的方案。在FP-LD不同激射模式中注入一路信号光和两路直流探测光,实现多波长变换并得到两路反码输出和一路正码输出;再通过光纤进行色散走离,使不同波长信号之间产生时延,形成UWB脉冲,最后经过光电转换产生UWB信号。对所提出的UWB信号产生方案的原理进行分析,并对UWB信号的波形以及频谱特性进行了实验研究。在此基础上,进行了1.25Gb/s非归零码(NRZ)信号注入FP-LD产生差分编码UWB信号的实验。实验产生的UWB脉冲信号半峰全宽最小为83.3ps,10dB谱宽约为4.6GHz,其频宽比为107%。 A scheme of generating ultra-wideband (UWB) signals based on the Fabry-Perot laser diode (FP-LD) with triple wavelength implantation is proposed. Injecting one signal light and two direct current detection lights in different lasing modes of FP-LD to realize multi-wavelength conversion and obtaining two anti-code outputs and one positive code output; and then performing dispersion dispersion through the optical fiber so that signals of different wavelengths Time delay between the formation of UWB pulse, and finally generated by UWB photoelectric conversion signal. The principle of the proposed UWB signal generation scheme is analyzed, and the waveform and spectral characteristics of the UWB signal are experimentally studied. On this basis, an experiment of injecting 1.25Gb / s non-return-to-zero (NRZ) signals into FP-LD to generate differentially encoded UWB signals was performed. The full width at half maximum (FWHM) of the UWB pulse signal generated by the experiment is 83.3ps, and the 10dB spectral width is about 4.6GHz with a bandwidth of 107%.