PROJECT TITLE :

A Low-Noise, Large-Dynamic-Range-Enhanced Amplifier Based on JFET Buffering Input and JFET Bootstrap Structure

ABSTRACT:

We tend to design a coffee-noise, giant-dynamic-vary amplifier based on transimpedance amplifier (TIA) for detecting shot noise of 1064-nm laser in quantum optical experiments. Compared with one-junction field-effect transistor (JFET) buffered TIA, the electronic noise is effectively a pair of.eight dB suppressed at the analysis of 2 MHz, and 4 dB suppressed at four MHz by suggests that of a JFET bootstrap structure. Beneath the transimpedance gain of 200 kΩ and 0.five pF, the measured shot noise at the injected laser power of 51 μW is twelve.five dB above the electronic noise at two MHz, and 9.eight dB at 4 MHz. With adjustment of bias condition of the bootstrap structure and application of a L-C (inductance and capacitance) structure, the dynamic vary is essentially boosted from the first 1.52 to 11.22 mW. The amplifier meets the necessity of SNR for Bell-state detection in quantum optical experiments.


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