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Limiting sensitivity of photodetectors based on A3B5 photodiodes for middle infrared range |
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| Authors: | G. A. Gavrilov B. A. Matveev G. Yu. Sotnikova |
| Abstract: | The noise of photodetectors based on mid-IR A3B5 photodiodes (PhDs) implemented in a transimpedance amplifier scheme is analyzed. Recommendations concerning the choice of amplifier elements depending on the dynamic resistance of PhDs are given. It is shown that, using modern low-noise amplifiers, it is possible to reach a potential limiting threshold sensitivity of photodetectors only using PhDs with dynamic resistances above 50 Ω. |
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