42.8 Gbit/s DPSK信号的波分复用传输实验

实现了42.8 Gbit/s 差分相移键控调制信号的三信道波分复用传输实验.传输链路为410 km的标准单模光纤,分为四个放大段,采用色散补偿光纤进行色散补偿和掺铒光纤放大器/分布式喇曼放大器混合放大方式.给出了差分相移键控信号及其解调后的信号在背对背和传输后的光谱和眼图(中路波长信号).在接收端使用单端检测,给出中路波长的差分相移键控信号背对背情况和传输后的误码率曲线,并与单信道传输时进行比较.经过传输后的中路信号的误码率可维持在1.0E-3左右.     

Ultra-Long Haul L-Band WDM Transmission over a Standard Single-Mode Fibre Loop Using DCF＋CFBG Hybrid Dispersion Compensation

We demonstrate a 10. 7Gb/s-line-rate L-band wavelength-division-multiplexer （WDM） loop transmission over a 1890-kin standard single-mode fibre （SSMF） with a 100-km amplifier spacing as well as non-return-to-zero （NRZ） format. The dispersion compensating fibre （DCF） plus chirped tibre Bragg grating （CFBG） is employed for hybrid inline dispersion compensation. The power penalty of each channel is less than 3 dB after three-loop transmission. The experimental results show that high-performance CFBGs can be successfully used in ultra-long haul （〉 1000km） WDM systems. We also point out that the all-CFBG compensation scheme is not suitable for re-circulating loop transmissions.     

基于高非线性光纤中四波混频饱和效应的NRZ-DPSK和RZ-DPSK信号幅度再生实验(英文)

利用高非线性光纤中的四波混频饱和效应,实验展示了42.8Gbit/s非归零差分相移键控(NRZ-DPSK)信号和归零差分相移键控(RZ-DPSK)信号的全光幅度再生.测量了NRZ-DPSK信号和RZ-DPSK信号经过高非线性光纤的功率传递曲线.在平均输入功率均为16dBm的条件下,对两种调制格式的再生性能进行了比较.实验结果显示RZ-DPSK信号具有更好的幅度再生性能.     

FP腔腔长的测量新方法

ＦＰ腔是ＷＤＭ光纤通信系统中用于波长控制和解调的关键器件。为了进行匹配系统的设计以及计算已制成腔的自由谱区，准确测定腔长是必不可少的工作，但是由于ＦＰ腔的具体结构，测定腔长无法用直接的方法进行。本文通过谐振腔的谐振特性分析，推导出一种测量腔长的新方案。     

基于非线性啁啾光纤光栅实现的色散可调谐

从原理上证明了一种基于非线性啁啾光纤光栅以及光纤光栅的温度特性的色散可调谐方案.实验证明在25.5℃的温度变化范围内,光纤光栅对1550.43nm波长的色散补偿量从759.1ps/nm上升到1659.9ps/nm,色散调谐范围达到900ps/nm,这个方案具有对补偿波长和特定补偿波长所需要的色散补偿量同时进行调谐的特点.     

Bidirectional radio-over-fiber systems with SSB modulation and wavelength reuse based on injection-locked semiconductor lasers

A 60-GHz bidirectional radio-over-fiber （RoF） system using two-carrier-injected distributed feedback （DFB） laser is proposed and demonstrated to realize optical single sideband （SSB） modulation for downlink.An injection-locked Fabry-P＇erot laser is also carried out to realize wavelength reuse in uplink.Transmission of 2.5 Gb/s on a 60-GHz carrier for downlink and 622-Mb/s baseband signal for uplink are both successfully demonstrated over 50-km single mode fiber without chromatic dispersion compensation.     

GMPLS网络中基于优先级的M : N保护

给出了一个GMPLS网络中关于广义标签交换通道(G.LSPs)的具有严格优先级M : N保护的排队模型,并通过仿真验证了本模型的正确性.该模型可用于基于优先级的M : N保护设计,通过适当选择保护通道数,可以确保一定的可靠性要求,同时避免过度配置而造成资源浪费.     

Long distance transmission of SC-FDMA signals by directly-modulated OIL-VCSEL

We demonstrate the long distance transmission of single-carrier frequency division multiple address signals by directly-modulated optically injection-locked vertical-cavity surface-emitting laser. Transmission distance as long as 50 km is achieved at 5 Gb/s (2.5 Gb/s for each user) through data pattern inversion and higher frequency response gain under optical injection locking.     

All-optical amplitude-shift keying and differential phase-shift keying to differential phase amplitude-shift keying format combination in highly nonlinear fiber

We propose an all-optical modulation formats combination scheme that merges an amplitude-shift keying （ASK） signal and a differential phase-shift keying （DPSK） signal into a single differential phase amplitude- shift keying （DPASK） signal based on parametric amplification in a highly nonlinear fiber. By optimizing the power of the ASK channel, formats combination of ASK and DPSK to DPASK signal is successfully demonstrated by computational simulation. The demodulation process of the generated DPASK pulses is investigated and the relationship between optical signal-to-noise ratio （OSNR） penalty and the input ASK power is presented. The proposed scheme may be used for increasing spectral efficiency and all-optical logic device.     

42.8 Gbit/s DPSK信号的波分复用传输实验

实现了42.8 Gbit/s 差分相移键控调制信号的三信道波分复用传输实验.传输链路为410 km的标准单模光纤,分为四个放大段,采用色散补偿光纤进行色散补偿和掺铒光纤放大器/分布式喇曼放大器混合放大方式.给出了差分相移键控信号及其解调后的信号在背对背和传输后的光谱和眼图(中路波长信号).在接收端使用单端检测,给出中路波长的差分相移键控信号背对背情况和传输后的误码率曲线,并与单信道传输时进行比较.经过传输后的中路信号的误码率可维持在1.0E-3左右.