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A power and wavelength detuning-dependent hysteresis loop in a single mode Fabry-Prot laser diode 下载免费PDF全文
In this paper, we observe experimentally the optical bistability induced by the side-mode injection power and wave-length detuning in a single mode Fabry-Prot laser diode (SMFP-LD). Results show that the bistability characteristics of the dominant and injected modes are strongly dependent on the injected input optical power and wavelength detuning in an SMFP-LD. We observe three types of hysteresis loops: counterclockwise, clockwise, and butterfly hysteresis with various loop widths. In the case of a bistability loop caused by injection power, the transition from counterclockwise to clockwise in the hysteresis direction with the wavelength detuning from 0.028 nm to 0.112 nm is observed in a way of butterfly hysteresis for the dominant mode by increasing the wavelength detuning. The width of hysteresis loop, induced by wavelength detuning is also changed while the injection power is enhanced from 7 dBm to 5 dBm. 相似文献
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苷类化合物研究(Ⅰ)——天麻苷类似物的合成 总被引:4,自引:0,他引:4
本文合成了16种天麻苷类似物,测定了它们的~(13)C NMR和~1H NMR。依据NMR数据,这些化合物的端基构型指定为β构型。 相似文献
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熊果苷是从植物中分离到的一种成分,据报道具有低毒性镇咳、利尿、抗菌和尿道消毒作用等生物活性。由于熊果苷水溶性好,便于机体吸收,有希望成为临床的新型镇咳药,它的结构式如下式所示。为了研究构(包括端基异构)效(镇咳作用)关系,作者以熊果苷为模型化合物,对糖基和配糖体分别进行有限的修饰,合成了一些熊果 相似文献