Related Experiment Video
Updated: Mar 14, 2026
10:17
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
12.1K
Switching Correlation and Noise Level in Pr(3+):YSO Crystal via Dressing Nonlinear Phase
Irfan Ahmed1,2, Zhaoyang Zhang1, Feng Wen1
1Key Laboratory for Physical Electronics and Devices of the Ministry of Education &School of Science &Shaanxi Key Lab of Information Photonic Technique, Xi'an Jiaotong University, Xi'an 710049, China.
Scientific Reports
|September 22, 2016
Summary
Controlling noise correlations in spontaneous parametric four-wave mixing is achieved by tuning the nonlinear phase. This modulation enables switching between correlation and anti-correlation, impacting noise levels in Stokes and anti-Stokes channels.
Area of Science:
- Quantum optics
- Nonlinear optics
- Photonics
Background:
- Spontaneous parametric four-wave mixing (SPFW) is a key process in quantum optics.
- Intensity noise correlations in SPFW affect quantum information applications.
- Controlling noise characteristics is crucial for optimizing SPFW-based systems.
Purpose of the Study:
- To demonstrate experimental control over intensity noise correlations.
- To investigate the role of relative nonlinear phase in SPFW.
- To modulate noise levels in Stokes and anti-Stokes channels.
Main Methods:
- Experimental demonstration of SPFW.
- Modulation of relative nonlinear phase, including self-phase and cross-phase modulation.
- Measurement of intensity noise correlations, intensity-difference, and intensity-sum.
Main Results:
- Intensity noise correlation and noise levels are controllable via relative nonlinear phase.
- Switching between correlation and anti-correlation is achieved by phase modulation.
- Noise level variations correlate with intensity fluctuation correlations.
Conclusions:
- Relative nonlinear phase is an effective parameter for controlling noise in SPFW.
- The findings offer a method for tailoring noise properties in quantum optical systems.
- Demonstrated control enhances the potential of SPFW for quantum technologies.
Related Concept Videos
01:16Biasing of P-N Junction
2.4K
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
2.4K
01:27Biasing of Metal-Semiconductor Junctions
753
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
753
01:24Time and frequency -Domain Interpretation of Phase-lead Control
496
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
496
01:22Biasing of FET
838
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
838
01:18Small-signal Diode Model
1.8K
In analyzing the behavior of diodes in circuits, the relationship between the current through a diode and the voltage across it is of particular interest, especially when considering the effect of a direct current (DC) bias voltage. When applied, this DC bias influences the diode's operating point, known as the Q point, around which the current-voltage (I-V) characteristic of the diode exhibits exponential behavior. Introducing a small, time-varying signal on top of this bias aids in examining...
1.8K
01:19The Y-to-Y Circuit
803
In a balanced four-wire wye-to-wye system, the arrangement involves wye-connected sinusoidal voltage sources and loads, connected through a neutral wire that links the neutral nodes of the source and load. The load impedance is connected across each phase of the load. The wye-connected source can be connected to the wye-connected load in four-wire and three-wire arrangements. A three-phase system is considered balanced when the load on each phase is equal, leading to uniform current flow and...
803