In broadband datacommunications systems and optic fiber communications systems, phased-lockedloops recovery clock signals from the input NRZ data and retime the data.
本文首先简述了锁相环的历史、发展与应用，并紧接着论述了电荷泵锁相环的重要性。
At last, simultaneous SOA-based NRZ-to-PRZ conversion and 2R regeneration of amplified NRZ signal using self phase modulation are investigated.
其次，将SOA和滤波器相结合，可以实现NRZ到伪归零的转换，可以得到反相的波长转换，输出结果取决于滤波器的失谐量。
A typical SOA FWM model is presented. And we propose all-optical bit error monitoring system based on the FWM model. The BEMS is realized by cascaded SOAs, which implement logic NOT and logic AND, respectively. The results show this scheme is competent for 40Gbit/s RZ format and 10Gbit/s NRZ format.
首先给出了SOA的FWM理论模型，然后根据该模型从理论上提出并模拟了一种全光比特误码检测器，该器件是利用两级级联的SOA的逻辑NOT门和AND门来完成的，结果表明该方案对于40Gbit/s的RZ信号和10Gbit/s的NRZ信号均能胜任。
The inverted wavelength conversion of the nonreturn to zero and the format conversion from NRZ to pseudo return to zero are demonstrated synchronously based on single SOA and an optical bandpass filter with 0.32 nm bandwidth. The conversion results depend on the OBF detuning as respect to the probe carrier.
利用半导体光放大器和带宽为0.32 nm的可调窄带滤波器同时实现了40 Gbit/s的非归零信号的反相波长转换和非归零到伪归零信号的码型转换，波长转换和码型转换的结果差异取决于滤波器中心波长相对于探测光波长的失谐量。
Numerical simulation of clock component extraction of NRZ signal using SOA LOOP mirror.
基于SOA光纤环境的NRZ信号时钟分量提取的数值模拟。
The numerical results show that the compensation effects for RZ system are excelled than that for NRZ system.
在实验中提出数字中值滤波的方法大大提高了测量DOP的精度，并提高了PMD补偿效果。
The Manchester encoded data is the output of a NRZ data XOR coding clock, shown in Fig.
曼彻斯特编码的数据是反向不归零数据与编码时钟异或的输出如图11所示。
Unipolar NRZ source, containing relevant to use the function of the Associa...
单极性归零码的源程序，内附相关用到的函数的说明。
Unipolar NRZ source, containing relevant to use the function of the Association.
详细说明：单极性归零码的源程序，内附相关用到的函数的说明。
NRZ-M? Non – Return – to – Zero Mark?
不归零标记，不归零符号
This paper makes comparisons between the modified optical duobinary return-to-zero format and the optical duobinary non return-to-zero format, which are both used in long distance transmission systems.
文章对长距离传输系统中使用的码型（改进型光双二进制归零码MD-RZ和光双二进制非归零码MD-NRZ）进行了比较。
The experimental results are demonstrated, which show that NRZ, RZ signal and optical, electrical clock are generated at the same time.
在FOPA中，利用对抽运光的正弦强度调制可以通过参量放大作用在直流信号光上产生光脉冲。
This paper first introduces the current number of modulation techniques, and NRZ, RZ and CS-RZ modulation format, the three have a mechanism and derived RZ and CS-RZ code conversion from the time domain to the relationship between the frequency domain.
本文首先介绍了当前的几种调制技术，和NRZ，RZ和CS-RZ这三种调制格式的产生机理并推导出RZ和CS-RZ码的从时域转换到频域的关系式。
In the system Ⅱ, based on the simulation results of system Ⅰ to compare the system performance using NRZ, RZ, and Manchester encoding respectively.
在系统Ⅱ中，根据系统Ⅰ之模拟结果，分别比较不归零码、归零码及曼彻斯特码等三种编码方式在系统效能上的差异。
By comparing the transmission characteristics of the two staggered phase modulation formats with four traditional cascading phase modulation formats, we show that, the SDPSK signal has similar chromatic dispersion and polarization-mode-dispersion tolerance to the DPSK signal with same NRZ or RZ shape, while the SDPSK signal has stronger nonlinear tolerance than the DPSK or DQPSK signal.
比较研究两种100Gbit/s光信号的中距离传输特性后得出：在不能进行一阶偏振模色散补偿和具有低带宽值光带通滤波器的城域网络中，占空比为33%的RZ-SDPSK码更适合于单信道传输；占空比为67%的CSRZ-SDPSK码能较好的抵抗剩余色散并具有较高的非线性容忍度。
Especially, for 40Gbit/s NRZ signals, multi-wavelength conversion from single channel to triple channels is obtained.
特别地，对40Gbit/s的NRZ信号实现了单信道到三信道多波长转换。
Some important parameters are analyzed. NRZ-to-PRZ and inverted wavelength conversion of NRZ signal have been demonstrated with the same structure.
首先从理论上提出了基于T-XPM效应的非归零到归零的码型转换，同时对码型转换的性能参数做了深入的分析。
Results of 10 Gb/s transmission show that the phase-pre-modulated NRZ signals have a power penalty lower than 1 dB with the absolute value of link dispersion less than 1000 ps/nm, exhibiting higher sensitivity and lower dispersion-induced penalty than conventional NRZ signals.
10Gb/s的传输结果表明，链路色散绝对值小于1000ps/nm时，施加相位预调制的非归零信号功率代价小于1dB，比普通非归零信号具有更高的接收灵敏度和更低的色散功率代价。
707 frame structure. The data format is NRZ with no FEC. This is the first and longest haul transmisson with no electrical relay at the rate of 40G bit/s in China.
这也是目前国内首次在40Gbit/s速率上进行的最长距离的无电中继传输。
We have shown that, to NRZ-DPSK, RZ-DPSK, NRZ-DQPSK, and RZ-DQPSK, when each signal was transmitted over 106km optical fiber, the NRZ-DQPSK signal has the highest chromatic dispersion tolerance when the fiber input powers of four phase modulation formats are same.
第二，在对四种传统的级联相位调制码进行100Gbit/s传输性能研究的基础上，提出和讨论了四种新颖的相位调制码，它们包括：光交错相移键控非归零码、50%占空比的光交错相移键控归零码、占空比为33%的RZ-SDPSK码、占空比为67%的CSRZ-SDPSK码。