排序方式: 共有37条查询结果,搜索用时 218 毫秒
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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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The principle of broad-band orthogonal-pump (BOP) four-wave mixing in semiconductor optical amplifiers is analyzed in theory. The conversion efficiency reduces rapidly as the detuning of wavelength between the signal and pump increase which can be solved by introducing a BOP method. The constant conversion efficiency and signal-to-noise ratio are obtained over a large wavelength detuning range. The wavelength conversion efficiency with variation smaller than 3.88 dB over 52-nm range has been experimentally demonstrated by using BOP, with the 10-GHz output of distributed feedback/electro-absorption modulator as signal. Conventional single-pump scheme is also performed for comparison and the experimental results fit well with the theory. 相似文献
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利用锁模光纤激光器在色散位移光纤中产生超连续谱的研究 总被引:2,自引:0,他引:2
采用主动锁模光纤激光器输出的重复频率10GHz、脉宽7.97ps的脉冲作为抽运光源,无需压缩后直接抽运4.2km的普通色散位移光纤(DSF).利用色散位移光纤中自相位调制、交叉相位调制等非线性效应的联合作用,获得了20dB带宽达125nm、覆盖整个C波段、L波段和部分S波段的超连续(SC)谱。实验研究了抽运光脉冲峰值功率和抽运波长对超连续谱宽度的影响,结果表明抽运光脉冲峰值功率越高,得到的超连续谱的带宽越宽;通过对抽运波长的优化,可以实现最大程度的超连续展宽;分析了滤波器带宽对脉冲质量的影响;利用0.4nm带宽的可调谐滤波器对从超连续谱中滤出脉冲的特性进行了研究,在超连续谱的不同波长处获得了脉宽为8.90~9.80ps、时间一带宽积为0.44~0.49的稳定的窄光脉冲。 相似文献
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为了避免传统的经验方法设计增益均衡滤波器(GEF)的主观性和不确定性,将电子学格型有限冲激响应(FIR)数字滤波的概念和算法移植到光学格型滤波器,提出一种基于掺Er光纤放大器(EDFA)自发增益(ASE)谱的频率采样设计法和光格型GEF的设计方案。该滤波器由数个各种分光比的波导耦合器经由具有单位时延差的光波导级连构成。分析了根据目标传递函数求解光格型阵列参数的算法,进而针对实际的ASE谱设计了40阶的GEF,在1527~1564nm波段内的增益平坦波动小于±0.4dB,并具有线性相频响应特性和互易性。 相似文献