通过理论建模,在中心站利用两级平行的马赫-增德尔调制器(Mach-Zehnder modul at or,MZM)组成一个光载毫米波倍频传输系统,两级MZM的射频驱动信号相位相差为45°。在基站利用PIN光电探测器对光信号进行直接探测,得到了纯度较高且频...通过理论建模,在中心站利用两级平行的马赫-增德尔调制器(Mach-Zehnder modul at or,MZM)组成一个光载毫米波倍频传输系统,两级MZM的射频驱动信号相位相差为45°。在基站利用PIN光电探测器对光信号进行直接探测,得到了纯度较高且频率为射频驱动信号频率8倍的毫米波信号。展开更多
Enhancing the spectral quality of the signal without varying the extinction ratio is a challenge for millimeter(MM)wave generation.Here,we propose a novel extinction ratio tolerant frequency 8-tupling technique using ...Enhancing the spectral quality of the signal without varying the extinction ratio is a challenge for millimeter(MM)wave generation.Here,we propose a novel extinction ratio tolerant frequency 8-tupling technique using two Mach-Zehnder modulators(MZMs)with optimal splitting ratio in parallel configuration.Although the proposed technique is not affected by extinction ratio,a high quality MM wave is still obtained with complete unwanted sideband suppression.Two non-ideal MZMs withπ/2 andπphase shifter realize MZM with optimal splitting ratio,which acts as a high extinction ratio modulator.The 80 GHz MM wave with 62 d B optical sideband suppression ratio(OSSR)and 54 d B radio frequency sideband suppression ratio(RSSR)is generated from 10 GHz local oscillator signal at 2.4036 modulation index(MI).Performance of the present work has been evaluated using various MIs,phase drifts and extinction ratios.Sideband suppression ratio(SSR)greater than 10 d B is reported in a wide MI ranging from 2.36 to 2.47.Further,both the SSRs are tolerant towards MZM extinction ratio.The work is ideal for wavelength division multiplexing(WDM)applications due to its filterless characteristics.展开更多
消光比是表征光发射机传输性能的重要参数,在诸多国际标准中均有针对消光比的限制。消光比参数的校准一般通过标准源比对的方式,此方法关键在于建立稳定、可调消光比的光信号源,并能够产生尽可能大的消光比数值。本文实现了一种基于级联...消光比是表征光发射机传输性能的重要参数,在诸多国际标准中均有针对消光比的限制。消光比参数的校准一般通过标准源比对的方式,此方法关键在于建立稳定、可调消光比的光信号源,并能够产生尽可能大的消光比数值。本文实现了一种基于级联MZM结构的高消光比信号产生装置,能产生12.5 Gb/s以下速率可调的光数字信号,并能保持输出消光比在12 d B以上。展开更多
文摘Enhancing the spectral quality of the signal without varying the extinction ratio is a challenge for millimeter(MM)wave generation.Here,we propose a novel extinction ratio tolerant frequency 8-tupling technique using two Mach-Zehnder modulators(MZMs)with optimal splitting ratio in parallel configuration.Although the proposed technique is not affected by extinction ratio,a high quality MM wave is still obtained with complete unwanted sideband suppression.Two non-ideal MZMs withπ/2 andπphase shifter realize MZM with optimal splitting ratio,which acts as a high extinction ratio modulator.The 80 GHz MM wave with 62 d B optical sideband suppression ratio(OSSR)and 54 d B radio frequency sideband suppression ratio(RSSR)is generated from 10 GHz local oscillator signal at 2.4036 modulation index(MI).Performance of the present work has been evaluated using various MIs,phase drifts and extinction ratios.Sideband suppression ratio(SSR)greater than 10 d B is reported in a wide MI ranging from 2.36 to 2.47.Further,both the SSRs are tolerant towards MZM extinction ratio.The work is ideal for wavelength division multiplexing(WDM)applications due to its filterless characteristics.
文摘消光比是表征光发射机传输性能的重要参数,在诸多国际标准中均有针对消光比的限制。消光比参数的校准一般通过标准源比对的方式,此方法关键在于建立稳定、可调消光比的光信号源,并能够产生尽可能大的消光比数值。本文实现了一种基于级联MZM结构的高消光比信号产生装置,能产生12.5 Gb/s以下速率可调的光数字信号,并能保持输出消光比在12 d B以上。
