Title :
A Low-Noise, Large-Dynamic-Range-Enhanced Amplifier Based on JFET Buffering Input and JFET Bootstrap Structure
Author :
Haijun Zhou ; Wenzhe Wang ; Chaoyong Chen ; Yaohui Zheng
Author_Institution :
State Key Lab. of Quantum Opt. & Quantum Opt. Devices, Shanxi Univ., Taiyuan, China
Abstract :
We design a low-noise, large-dynamic-range amplifier based on transimpedance amplifier (TIA) for detecting shot noise of 1064-nm laser in quantum optical experiments. Compared with a single-junction field-effect transistor (JFET) buffered TIA, the electronic noise is effectively 2.8 dB suppressed at the analysis of 2 MHz, and 4 dB suppressed at 4 MHz by means of a JFET bootstrap structure. Under the transimpedance gain of 200 kΩ and 0.5 pF, the measured shot noise at the injected laser power of 51 μW is 12.5 dB above the electronic noise at 2 MHz, and 9.8 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 range is largely boosted from the original 1.52 to 11.22 mW. The amplifier meets the requirement of SNR for Bell-state detection in quantum optical experiments.
Keywords :
junction gate field effect transistors; low noise amplifiers; operational amplifiers; quantum optics; shot noise; Bell-state detection; JFET bootstrap structure; JFET buffering input; L-C structure; SNR; bias condition; capacitance 0.5 pF; electronic noise; frequency 2 MHz; frequency 4 MHz; inductance and capacitance structure; low-noise large-dynamic-range-enhanced amplifier; power 1.52 mW to 11.22 mW; power 51 muW; quantum optical experiments; resistance 200 kohm; shot noise detection; single-junction field-effect transistor buffered TIA; transimpedance amplifier; wavelength 1064 nm; Capacitance; JFETs; Laser noise; Optical amplifiers; Optical buffering; Stimulated emission; Bell-state detection; JFET bootstrap; JFET buffering; L-C structure; TIA; large dynamic range; low noise; quantum optical experiments;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2014.2371893
