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为了获得各个波长独立可调的、稳定的时域交织多波长超短脉冲序列,满足光电混合模数转换器(ADC)对采样脉冲源的需求,该文首次结合啁啾-色散脉冲压缩技术和高速光子开关技术来实现超短脉冲产生及多波长脉冲时域分离。在验证性实验中,4个密集波分复用(DWDM)标准波长的直流光源在经过强度和相位调制、光子开关以及色散模块后,产生了各个波长功率可独立调节的时域交织多波长光脉冲,脉宽约22 ps,有希望实现40 GS/s或更高采样率的光电混合ADC。在系统级测试中,使用这种方法产生的脉冲序列在完成待测信号的采样后,其无杂散动态范围(SFDR)超过32 dBc,等效于5.3 b的SFDR比特数(SFDR bits)。
In order to obtain the independent adjustable and stable time-interleaved multi-wavelength ultrashort pulse sequences with different wavelengths and meet the requirements of the analog-to-digital converter (ADC) for sampling pulse sources, this paper firstly introduces the chirp-dispersion pulse compression technique and High-speed photonic switch technology to achieve ultrashort pulse generation and multi-wavelength pulse time domain separation. In the confirmatory experiment, four Dense Wavelength Division Multiplexed (DWDM) standard wavelength DC light sources were generated after the intensity and phase modulation, photonic switch and dispersion module, each wavelength power can be independently adjusted time-domain multiwavelength light Pulse, pulse width of about 22 ps, there is hope for the realization of 40 GS / s or higher optical mixing ADC. In system-level testing, the pulse sequence generated using this method yields more than 32 dBc spurious-free dynamic range (SFDR) after completing the sampling of the signal under test, equivalent to 5.3 b SFDR bits.