The principle, structure and system of nonlinear liquid crystal optical signal amplifiers are described. Experimental results are theoretically analysed for optical signal amplifers. It shows that this type of the opt...The principle, structure and system of nonlinear liquid crystal optical signal amplifiers are described. Experimental results are theoretically analysed for optical signal amplifers. It shows that this type of the optical signal amplifiers are comprised of liquid crystal light sensitive medium which can receive a modulated signal optic wave and a pump wave, and can be applied to optical transmission systems.展开更多
Amplifier is at the heart of experiments carrying out the precise measurement of a weak signal. An idea quantum amplifier should have a large gain and minimum added noise simultaneously. Here, we consider the quantum ...Amplifier is at the heart of experiments carrying out the precise measurement of a weak signal. An idea quantum amplifier should have a large gain and minimum added noise simultaneously. Here, we consider the quantum measurement properties of the cavity with the OPA medium in the op-amp mode to amplify an input signal. We show that our nonlinear-cavity quantum amplifier has large gain in the single-value stable regime and achieves quantum limit unconditionally.展开更多
文摘The principle, structure and system of nonlinear liquid crystal optical signal amplifiers are described. Experimental results are theoretically analysed for optical signal amplifers. It shows that this type of the optical signal amplifiers are comprised of liquid crystal light sensitive medium which can receive a modulated signal optic wave and a pump wave, and can be applied to optical transmission systems.
基金Supported by the National Natural Science Foundation of China under Grant Nos.11365006,11364006the Natural Science Foundation of Guizhou Province QKHLHZ[2015]7767
文摘Amplifier is at the heart of experiments carrying out the precise measurement of a weak signal. An idea quantum amplifier should have a large gain and minimum added noise simultaneously. Here, we consider the quantum measurement properties of the cavity with the OPA medium in the op-amp mode to amplify an input signal. We show that our nonlinear-cavity quantum amplifier has large gain in the single-value stable regime and achieves quantum limit unconditionally.
