Highly sensitive mid-infrared upconversion detection based on external-cavity pump enhancement

HIGHLIGHTS

• What: The authors propose and implement a high-efficiency and low-noise MIR upconversion detection system based on pumping enhancement via a low-loss optical cavity. The authors implement a highly sensitive MIR upconversion detection system based on external-cavity pump enhancement, which leads to an NEP as low as 0.3 fW∕Hz1∕2, ~10-fold better than previously reported values for CW-pumping MIR Advanced Photonics Nexus upconversion detectors.
• Who: Xiaohan Liu and colleagues from the East China Normal University, State Key Laboratory of Precision Spectroscopy, Shanghai, China have published the research work . . .
  

   

  

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