排序方式: 共有110条查询结果,搜索用时 453 毫秒
91.
将再生锁模光纤激光器(RMLFL)输出的约5.8 ps脉宽的高质量无啁啾双曲正割脉冲,通过掺铒光纤放大器(EDFA)放大后注入4.28 km长的色散平坦光纤(DFF)中,利用二阶孤子压缩效应成功地将脉冲压缩到1.74 ps,压缩比为3.3,与理论计算结果完全一致。与基于色散渐减光纤(DDF)的绝热孤子压缩(ASC)方案相比,该方案在同样的孤子阶数下大大降低了入射功率,而且色散平坦光纤的非色散渐减特性决定了它对于不同波长、不同脉宽的输入都可以通过调整输入脉冲功率和选取合适的光纤长度来配合满足压缩条件。虽然压缩因子不大,但基本能满足需求。 相似文献
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A simple method to mechanically induce a long-period fiber grating (LPFG) by a grooved plate is improved. The transmission spectra of a grating under different pressures and other types of gratings are experimentally investigated. This method is simple and reconfigurable and offers large spectra tunability. This type of LPFG has potential applications in gain flattening in erbium-doped fiber amplifiers (EDFA) and will be of particular use in filter design. 相似文献
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We present a 10-GHz hybrid actively and passively mode-locked fiber ring laser with a dispersion im-balanced nonlinear loop mirror (DI-NOLM), whose nonlinear switching characteristic can make the laser operate at additive pulse modelocking (APM) mode or additive pulse limiting (APL) mode. When the laser operated at APM, 5.45 ps of transform-limited pulse series were obtained. When the laser was biased at APL region, supermode noise was suppressed and the laser output was more stable. 相似文献
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基于色散不对称光纤环形镜的锁模光纤激光器 总被引:1,自引:0,他引:1
在理论上数值计算了各种常量对色散不对称非线性光纤环形镜透射特性的影响。并分析了它作为被动锁模器件用于光纤激光器压窄脉冲的物理机制。利用8字形主被动混合锁模的结构在调制频率为9.998748700 GHz,波长为1566.65nm处获得了11ps的稳定锁模脉冲输出.对应谱宽0.297nm.同时在重复频率为9.995792825 GHz和9.996778256 GHz时分别得到了振幅均匀的二阶和三阶谐波锁模输出。证明色散不对称非线性光纤环形镜可以有效消减脉冲的尾翼和噪声.得到脉幅稳定的脉冲序列。 相似文献
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密集波分复用光网络的不断演进带动节点器件技术飞速发展,光滤波技术作为其中的关键之一已不仅仅是原来狭义的复用/解复用器的概念,其涵盖的范畴越来越多,包括光分插复用(OADM)、光交叉连接(OXC)、增益平坦滤波(GFF)、色散补偿(DC)、泵浦合波器(PBC)、动态增益均衡器(DGE)、波长锁定器(Wave locker)等。滤波手段层出不穷,多腔介质膜滤波器(MDTFF)、阵列波导光栅(AWG)、光纤布拉格光栅(FBG)、熔融拉锥器件(FBT)、奇偶交错滤波器(Interleaver),此外还有声光可调谐滤波器(AOTF)、闪耀光栅、全息光栅、全光纤March-Zehnder干涉… 相似文献
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A novel tunable multi-wavelength fiber ring laser based on semiconductor optical amplifier(SOA)is proposed by using a high-birefringence(Hi-Bi)fiber loop mirror(FLM)as wavelength filter.With this configuration,the wavelength spacing of this laser can be varied by using the different lengths of Hi-Bi fiber.8 wavelengths spacing on 450 GHz are experimentally obtained with more than 25-dB signal-to-noise ratio(SNR)for each channel using 1.28-m Hi-Bi fiber in Hi-Bi FLM.The output power variation between different channels is measured to be less than 5.9 dB.The linewidth of each channel is compressed from 0.347 to 0.186 nm by 1.5-m unpumped erbium-doped fiber(EDF).Meanwhile,17 wavelengths spacing on ITU-gird(100 GHz)are also obtained with 5.9-m Hi-Bi fiber in Hi-Bi FLM.All these channels can be tuned together over 0.4 nm. 相似文献
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