2022
DOI: 10.1109/access.2020.2969225
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The Dispersion Reduction Frequency Upconversion System at 1550 nm With Tightly Focused Beam

Abstract: The upconversion detection is a promising method to detect infrared radiation. It is proved that the focused beam makes a contribution to improving the upconversion efficiency. A nearinfrared detector at room-temperature based on sum frequency generation(SFG) with focused beams is demonstrated. To enhance the upconversion efficiency, the signal and pump beams are tightly focused by the same focal lens. To reduce that the dispersion of the focal lens has a negative effect on upconversion efficiency in a tightly… Show more

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