共查询到19条相似文献,搜索用时 140 毫秒
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交叉增益型波长转换器的实验研究 总被引:1,自引:0,他引:1
全光波长转换器是全光网络中的关键光电子器件.基于半导体光放大器的交叉增益型波长转换器具有结构简单容易实现、转换效率高、波长转换范围宽以及转换速率高的特点.文中在自行研制半导体光放大器的基础上,对交叉增益型波长转换器进行了实验研究.讨论了实现波长转换的基本原理,描述了实验系统结构,实现了速率为140Mbit/s的1315nm和1301nm之间的波长转换.研究了波长转换器泵浦光功率、探测光功率以及放大器注入电流转换效率、消光比和噪声特性的影响,研究结果与文献中报道的相同.研究表明,不同因素对不同指标的影响是相互制约的,要全面提高波长转换器的性能,必须折衷考虑各方面的因素.研究结果对半导体光放大器结构参数的优化和波长转换工作条件的优化有一定的指导作用. 相似文献
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利用光子晶体光纤实现全光波长转换研究 总被引:1,自引:1,他引:1
作为自动交换光网络中的核心器件,全光波长转换器在网络中发挥着重要作用。重点介绍基于光纤参量放大器实现全光波长变换的进展和工作原理。提出利用光子晶体光纤的强非线性来实现全光波长转换,在未来光通信领域将具有广阔的应用前景。 相似文献
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基于光纤中前向瞬态受激拉曼散射效应分析理论,利用光子晶体的高非线性特性,对光子晶体光纤拉曼波长转换进行了数值分析,并建立了全光波长转换设计方案的理论模型,给出了设计原理框图及实现方法。用OptiSystem对四路探测光进行波长转换仿真,仿真结果表明:所设计的全光波长转换器同时对四路探测光实现波长转换,转换输出的信号光码型和输入泵浦信号光码型一致,并且所得到的眼图线迹清晰,眼睛张开度良好。论证了该设计方案可行。 相似文献
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实验研究了基于半导体光放大器(SOA)的四波混频(FWM)效应的单抽运光正交频分复用(OFDM)信号的波长变换系统.信号光源和抽运光源分别由两个不同输出波长的可调分布反馈式激光器(DFB-LD)产生.信号光源经2.5 Gb/s OFDM的电信号直接调制后再和抽运光源耦合,经光放大器后在SOA实现波长变换.实验结果显示,耦合信号经SOA四波混频效应后,产生新波长的信号光将携带OFDM信号,且转换效率与信号光和抽运光的功率、波长以及两者的偏振夹角有关.同时也测量了转换的OFDM信号的功率-误码曲线和接收星座图. 相似文献
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Min Yong Jeon Young Ahn Leem Dong Churl Kim Eundeok Sim Sung‐Bock Kim Hyunsung Ko Dae‐Su Yee Kyung Hyun Park 《ETRI Journal》2007,29(5):633-640
We report an experimental demonstration of 40 Gbps all‐optical 3R regeneration with all‐optical clock recovery based on InP semiconductor devices. We also obtain all optical non‐return‐to‐zero to return‐to‐zero (NRZ‐to‐RZ) format conversion using the recovered clock signal at 10 Gbps and 40 Gbps. It leads to a good performance using a Mach‐Zehnder interferometric wavelength converter and a self‐pulsating laser diode (LD). The self‐pulsating LD serves a recovered clock, which has an rms timing jitter as low as sub‐picosecond. In the case of 3R regeneration of RZ data, we achieve a 1.0 dB power penalty at 10?9 BER after demultiplexing 40 Gbps to 10 Gbps with an eletro‐absorption modulator. The regenerated 3R data shows stable error‐free operation with no BER floor for all channels. The combination of these functional devices provides all‐optical 3R regeneration with NRZ‐to‐RZ conversion. 相似文献
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We present first monolithic integration of a waveguide optical isolator with a distributed feedback laser diode (DFB LD) in the 1.5-mum wavelength range. The integrated devices are composed of 0.25-mm-long index-coupled DFB LDs and 0.75-mm-long semiconductor active waveguide optical isolators. The semiconductor active waveguide optical isolators are based on the nonreciprocal loss in the semiconductor optical amplifier (SOA) waveguides with ferromagnetic metals (Fe). The fabrication process consists of two steps of metal-organic vapor phase epitaxy to grow the DFB LD/SOA layer structures, one dry-etching process for the waveguide stripe formation, and three steps of electron-beam evaporation for the electrodes and ferromagnetic metals deposition. They showed single-mode emission at 1543.8nm and 4-dB optical isolation under a magnetic field of 0.1 T. 相似文献
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We report on a new type of polarization insensitive frequency conversion technique using four-wave mixing (FWM) in a semiconductor optical amplifier (SOA). In this technique the input signal is spectrally duplicated by a Mach-Zehnder type phase modulator. Then, the resulting two waves generate the frequency converted output signal by FWM with use of an additional pump wave. The converted output wavelength is independent of the wavelength of the input signal. In addition to the frequency conversion, the chirp of the input signal is removed by the FWM process bit-error-rate (BER)-measurements after transmission of the converted signal over standard communication fiber are reported 相似文献
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Wavelength conversion up to 18 nm at 10 Gb/s by four-wave mixing in a semiconductor optical amplifier 总被引:1,自引:0,他引:1
D.F. Geraghty R.B. Lee K.J. Vahala M. Verdiell M. Ziari A. Mathur 《Photonics Technology Letters, IEEE》1997,9(4):452-454
We characterize the conversion bandwidth of a four-wave mixing semiconductor optical amplifier wavelength converter. Conversion of 10-Gb/s signals with bit-error-rate (BER) performance of <10/sup -9/ is demonstrated for wavelength down-shifts of up to 18 nm and upshifts of up to 10 nm. 相似文献
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We report first measurements of the effect of optical feedback on the bit error rate (BER) as a function of received power of single longitudinal mode cleaved-coupled cavity (C3) and distributed-feedback (DFB) semiconductor lasers. Mode-partition noise, induced by the optical feedback, can cause a bit error-rate floor for large optical feedbacks, but it is shown that high-performance C3lasers and especially DFB lasers can withstand very large optical feedbacks without system degradation. 相似文献
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40 Gbit/s wavelength and polarisation insensitive all-optical clock recovery using a two-section distributed feedback (DFB) laser has been demonstrated. The polarisation sensitivity of the two-section DFB laser was solved by converting incoming data onto a local laser through cross-gain modulation using a semiconductor optical amplifier. The scheme has a sensitivity of -13 dBm 相似文献
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D. George H. Fews M. McCall 《Photonics Technology Letters, IEEE》1997,9(1):49-51
We have investigated a new technique for the enhancement of a wavelength conversion system based on nearly degenerate four wave mixing in a InGaAsP DFB semiconductor laser amplifier. We report enhanced wavelength conversion over 20 nm from 1.55 /spl mu/m to 1.53 /spl mu/m using feedforward photomixing from two independent source lasers to directly modulate the semiconductor laser amplifier. We find that the wavelength conversion efficiency is enhanced by 200% using this technique. 相似文献