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Note: Switch-mode hybrid current controllers for quantum cascade lasers

机译:注意:用于量子级联激光器的开关模式混合电流控制器

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Chemical sensing in the mid-infrared has been revolutionized by the advent of quantum cascade lasers. Their higher current and voltage demands compared to laser diodes however, negatively impact size, weight, and power footprint for fieldable systems, particularly in hot environments. This Note presents a switch-mode/linear hybrid controller, furnishing drive currents up to 2 A at compliance voltages up to 15 V, with output noise near levels determined by shot and Johnson contributions from within the linear regulator, from frequencies below 100 Hz to the switching frequency. Current modulation from near 0 to 1.8 A is also demonstrated at frequencies up to a kilohertz.
机译:量子级联激光器的出现彻底改变了中红外化学传感技术。但是,与激光二极管相比,它们对电流和电压的要求更高,这会对现场系统的尺寸,重量和功率足迹产生负面影响,尤其是在高温环境下。本说明介绍了一种开关模式/线性混合控制器,在高达15 V的顺从电压下提供高达2 A的驱动电流,其输出噪声接近线性稳压器内部的散粒和Johnson贡献所确定的水平,从低于100 Hz至开关频率。在高达千赫兹的频率下,也证明了从0到1.8 A的电流调制。

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