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首页> 外文期刊>RSC Advances >Visual monitoring of laser power and spot profile in micron region by a single chip of Zn-doped CdS nanobelts
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Visual monitoring of laser power and spot profile in micron region by a single chip of Zn-doped CdS nanobelts

机译：Zn掺杂的CdS纳米带单芯片对微米区域的激光功率和光斑轮廓进行视觉监控

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摘要

On the basis of pumping-power-dependent emission property, single-chip zinc-doped cadmium sulfide nanobelts are developed to monitor injected laser power and detect the profile of laser focal spots visually in the micron region through color changes. By doping zinc into cadmium sulfide nanobelts, band-edge emission with green color and deep-trap-state emission with red color are generated by injected laser beam pumping. The monotonic intensity ratio changes of these two emissions reflect the pumping power variations, so that the laser power and focus spot distribution can be monitored quantitatively by the on-chip nanobelts. Utilizing the on-chip zinc-doped cadmium sulfide nanobelts to detect input laser power, more than two thousand cycles of pumping laser power increasing and decreasing periodically are applied on the nanomaterial chip, accompanied by emission-color switching between yellow emission and green emission, which confirm that the zinc-doped cadmium sulfide nanobelts are stable and effective. The method involves visually perceiving the change of laser power and detecting the distribution profile of the laser spot. This optical ratiometric method based on nanostructures is quite different from the traditional detection mode by the thermoelectric effect. Therefore, it has potential application as a laser power monitoring tool for optically integrated micro-circuits.
机译：基于依赖于泵浦功率的发射特性，开发了单芯片掺杂锌的硫化镉纳米带，以监测注入的激光功率，并通过颜色变化直观地检测微米区域的激光焦点轮廓。通过将锌掺杂到硫化镉纳米带中，通过注入激光束泵浦产生绿色的带边发射和红色的深陷阱态发射。这两种发射的单调强度比变化反映了泵浦功率的变化，因此可以通过片上纳米带定量监测激光功率和焦点分布。利用片上掺杂锌的硫化镉纳米带来检测输入激光功率，在纳米材料芯片上周期性地施加了两千多个周期的泵浦激光功率增减周期，并伴随着黄绿色和绿色发射之间的发射颜色切换，证实了掺锌硫化镉纳米带是稳定有效的。该方法涉及视觉感知激光功率的变化并检测激光光斑的分布轮廓。这种基于纳米结构的光学比例测量方法与传统的检测模式相比，在热电效应上有很大不同。因此，它有潜力作为光学集成微电路的激光功率监控工具。

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