共查询到19条相似文献,搜索用时 93 毫秒
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在理论上研究了行波半导体光放大器的增益饱和特性,并从半导体的单模速率方程出发,应用半导体光放大器的传输波动方程,推导了放大器的增益特性表达式。从中得出:当放大器的输出功率为饱和输出功率时,信号增益相对于不饱和增益降低4.34dB。 相似文献
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对用于超宽带系统的具有非均匀量子阱结构的1.5μmGaInAs/InP锥形半导体光放大器进行了研究。研究发现,通过使量子陆的厚度这一参数达到最优值,可以获得超过100nm的平坦增益带宽。 相似文献
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为了深入研究量子点半导体光放大器(QD-SOA)的特性,建立了量子点半导体光放大器子带导带的三能级系统模型.把系统载流子的速率方程与其他文献采用的速率方程进行了对比优化.通过数值计算得到了瞬态解,并得到载流子在放大器各能级态的浓度分布,验证了量子点中能级分立特性.利用电子和空穴各自的占有几率在基态成一定的线性关系,在稳态下对速率方程求解,得出了量子点半导体光放大器相关的增益特性,以及增益特性与基态电子的占有几率之间的关系.结果表明量子点半导体光放大器具有很高的饱和增益和微分增益,较低的阈值电流等特性.说明量子点半导体光放大器具有比其他体材料和量子阱光放大器更加优异的特性.为光放大器的设计提供了有力的理论指导. 相似文献
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半导体激光干涉仪在微振动测量中的应用 总被引:3,自引:1,他引:2
文中介绍一种用半导体激光器构建小型迈克尔逊干涉仪实现对微振动量精确测量的方法,实验证明,这种方法完全可以实现。用这种方法构建的微振动传感器体积小、质量轻、价格便宜并具有很高的灵敏度和准确度 相似文献
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The effects of gain saturation due to amplified spontaneous emission in systems comprising cascaded semiconductor laser amplifiers and attenuators are investigated. The influence of the relative spatial distribution in the link of gain and loss is analyzed numerically, and conclusions regarding noise optimal structures are drawn. It is shown that the performance of links with gain saturation can be quite different from the ideal, unsaturated case 相似文献
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根据行波半导体放大器中载流子复合的实际过程,对放大器饱和参量的表达式作了适当的修正。 相似文献
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Saitoh T. Itoh H. Noguchi Y. Sudo S. Mukai T. 《Photonics Technology Letters, IEEE》1989,1(10):297-299
Optical pulses with durations ranging from 0.49 to 21 ps are amplified by a traveling-wave semiconductor laser amplifier. The pulse energy gain is determined by pulse energy only. The dependence of pulse energy gain on output pulse energy does not change in the pulse duration range. The saturation characteristics are successfully explained by a four-level system model 相似文献
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Nonlinear distortions induced by four-wave mixing and gain saturation in a semiconductor laser amplifier can affect the overall performance of lightwave systems using such devices. A model which includes both types of distortion in a three-channel optical transmission system is presented. Large-signal analysis is used to calculate distortion in amplifiers operating near saturation. The technique provides more realistic predictions than the small-signal rate equation analysis used in previous theoretical studies of four-wave mixing in optical amplifiers 相似文献