- 期刊
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超快雷射時間解析激發探測量測系統訊噪比之提升
SNR Improvement of Ultrafast Laser Based Time- Resolved Pump-Probe System
摘要
本研究著重於提升時間解析激發－探測量測系統的訊噪比，透過超快雷射之鎖模狀態觀測、即時影像監控激發探測光束之重合狀態、光偵測器參數最佳化，以及調整正交之偏振狀態等，期望找出適當最佳化參數，以獲得時間解析激發－探測反射率量測的最佳訊號。以GaAs晶片做為最佳化的實驗樣品，激發光與探測光強度分別僅需要50 mw及1 mw之低功率操作，目前已可將訊噪比提升至50左右。
關鍵字
無資料並列摘要
SNR is an important indicator for time-resolved pump-probe system. We focus on improvement of SNR in this study. After optimization, the SNR of time-resolved pump-probe system for GaAs sample is about 50 in this system. The optical power for pump and probe beam is only 50 mW and 1 mW, respectively.
並列關鍵字
無資料延伸閱讀
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