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Erbium-doped CW and Q-switched fiber ring laser with fiber grating Michelson interferometer 总被引:2,自引:0,他引:2
The band-pass characteristic of fiber grating Michelson interferometer is analyzed, which acts as bothband-pass filter and Q-switch. An erbium-doped fiber ring laser based on fiber grating Michelsoninterferometer is implemented for producing single longitudinal mode CW operation with 5 MHz spectrallinewidth and up to 6 mW output power. In Q-switched operation, stable fiber laser output pulses withrepetition rate of 800 Hz, pulse width of 0.6 μs, average power of 1.8 mW and peak power of 3.4 W aredemonstrated. The peak power and average power of the Q-switched pulses are varied with the repetitionrate. 相似文献
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将语音卡引入实验教学软件后,充分调动了人们接受信息的视与听两种主要能力,使程序编制更为简单,且更吸引学生注意力。 相似文献
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提出了一种基于二维光子晶体微环腔的新型光分叉复用器,并可以通过改变环区的硅介质柱的折射率实现波长调谐.运用经典的微环自由光谱范围FSR和微环半径R的关系,证实新型的光子晶体微环腔也满足该关系.利用二维时域有限差分法系统分析了下路信号波长及相应效率随折射率的变化关系.结果表明,只需改变环区折射率0.005,下路波长就可以漂移1 nm,而有效微环半径还不足1.4 μm. 相似文献
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本文设计了一个基于圆柱型硅光子晶体自准直环形腔的1×2光下路分束器.该光下路分束器由三个分光镜和一个反射镜构成,其中窄光束依赖自准直效应进行传输.利用多光束干涉理论分析了光下路分束器中不同出口的理论透射谱,并且利用时域有限差分法对光下路分束器透射谱进行数值模拟计算,其结果与理论预测基本一致.当下路波长为1 550 nm时,光下路分束器的自由光谱范围约为30 nm,几乎涵盖了整个光通信C波段.由于其小尺寸和全硅材料,本文设计的1×2光下路分束器有望应用于未来的集成光路中. 相似文献
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基于迈克耳孙干涉仪的二维光子晶体传感器 总被引:1,自引:0,他引:1
在基于自准直效应的二维空气柱型光子晶体迈克耳孙(Michelson)干涉仪的基础上设置一块传感区域,改变传感区折射率从而引起一路光的相位发生变化,导致干涉之后输出光束的能量也随之改变.利用平面波展开法计算得到的等频面确定了入射光的自准直频率范围.运用时域有限差分法分析该传感器的灵敏度最高可达120 nm/RIU,通过单频光入射实现了该传感器的传感模拟.该传感器完全依赖自准直导光,不需构造任何缺陷波导,对制造丁艺的要求大大降低.对于1.55μm的中心工作波长,传感器大小只有几十微米,进一步添加分束器可以实现高度并联传感器探测. 相似文献
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A practical two-stage double-pass structure using high concentration erbium-doped fiber and 1480-nm pump laser diode is suggested for a high power and broad bandwidth erbium-doped superfluorcscent fiber source. A considerable increase in output power and bandwidth extension is achieved by adding an unpumped fiber and a broadband fiber mirror to make the most of wasted backward amplified spontaneous emission as both pump and input light source simultaneously. Superfluorcscent fiber source with nearly 80-nm bandwidth and 28.6-mW output power is obtained experimentally. 相似文献
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