CAJ | 학술논문

提出并实验证实了利用色散平坦高非线性光子晶体光纤中双抽运四波混频效应实现非归零(NRZ)到归零(RZ)码型转换的新方案,将一束NRZ信号光与两束同步时钟脉冲光同时注入光子晶体光纤,通过双抽运四波混频效应产生两个闲频光,经过光学滤波后即可完成单到双全光NRZ-RZ码型转换.与基于常规单抽运四波混频效应的码型转换方式相比,本设计方案由于采用了双抽运四波混频效应,因此具有双路组播信号波长可彼此独立选取的优点.分析了码型转换器的波长调谐性及对输入光功率波动的容忍性,得到转换信号的最优消光比和Q因子分别为15 dB和5.4.研究结果表明,本方案既具有对比特率和调制格式透明的优点,又避免了使用单抽运四波混频效应进行码型转换时两路组播信号波长相互制约的弊端,且实现了全光波长转换和波长组播功能.
제출병실험증실료이용색산평탄고비선성광자정체광섬중쌍추운사파혼빈효응실현비귀령(NRZ)도귀령(RZ)마형전환적신방안,장일속NRZ신호광여량속동보시종맥충광동시주입광자정체광섬,통과쌍추운사파혼빈효응산생량개한빈광,경과광학려파후즉가완성단도쌍전광NRZ-RZ마형전환.여기우상규단추운사파혼빈효응적마형전환방식상비,본설계방안유우채용료쌍추운사파혼빈효응,인차구유쌍로조파신호파장가피차독립선취적우점.분석료마형전환기적파장조해성급대수입광공솔파동적용인성,득도전환신호적최우소광비화Q인자분별위15 dB화5.4.연구결과표명,본방안기구유대비특솔화조제격식투명적우점,우피면료사용단추운사파혼빈효응진행마형전환시량로조파신호파장상호제약적폐단,차실현료전광파장전환화파장조파공능.
@@@@A novel all-optical format conversion scheme based on dual-pump four-wave-mixing (DP-FWM) in dispersion-flattened highly nonlinear photonic crystal fiber (DF-HNL-PCF) is proposed and experimentally demonstrated. The original non-return-to-zero (NRZ) format is converted into double return-to-zero (RZ) format by injecting NRZ signal and double synchronized clock signals into the DF-HNL-PCF. The DP-FWM effect generates two sideband components, which carry the same data information as the original NRZ signal with RZ format. The wavelength tunability and dynamic range of format converter are investigated. The optimum extinct ratio and Q factor of converted signals are 15 dB and 5.4, respectively. The advantages of this scheme are that the each wavelength of double channel multicasting signals is dependent and flexible. Moreover, the system is transparent to bit rate as well as modulation format, and achieves all-optical wavelength conversion and wavelength multicasting.