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Related Concept Videos

Conversion of Units01:36

Conversion of Units

Sometimes, there is a need to convert from one unit to another one. For instance, reading a cookbook in which quantities are expressed in units of liters or ounces may require conversion of quantities to cups. Or, when looking up directions on how to get to a location, we may be interested to know how many miles we are going to walk. In this case, we would have to convert units of feet or meters to miles.
The first step in the unit conversion is to list the given units and the units required...
Properties of the z-Transform I01:17

Properties of the z-Transform I

The z-transform is a fundamental tool in digital signal processing, enabling the analysis of discrete-time systems through its various properties. It is an invaluable tool for analyzing discrete-time systems, offering a range of properties that simplify complex signal manipulations. One fundamental property is linearity. For any two discrete-time signals, the z-transform of their linear combination equals the same linear combination of their individual z-transforms. This property is essential...
Second Order systems I01:20

Second Order systems I

A servo system exemplifies a second-order system, featuring a proportional controller and load elements that ensure the output position aligns with the input position. The relationship between these components is described by a second-order differential equation. Applying the Laplace transform under zero initial conditions yields the transfer function, showing how inputs are converted to outputs in the system.
By reinterpreting the system, one can derive the closed-loop transfer function, which...
Second Order systems II01:18

Second Order systems II

In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
If  ζ...
Upsampling01:22

Upsampling

Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
Control Systems01:10

Control Systems

Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
At the heart...

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Related Experiment Video

Updated: Jun 16, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

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Upconversion-a Systems View.

A F Milton

    Applied Optics
    |February 2, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Parametric upconversion using proustite offers specialized detection for laser-based imaging systems with small fields of view. However, it is unlikely to compete for thermal imagery applications.

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    Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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    Published on: September 12, 2014

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    06:25

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    Triplet Fusion Upconversion Nanocapsule Synthesis
    08:36

    Triplet Fusion Upconversion Nanocapsule Synthesis

    Published on: September 7, 2022

    Area of Science:

    • Nonlinear optics
    • Quantum optics
    • Materials science

    Background:

    • Parametric upconversion is a nonlinear optical process.
    • Proustite is a nonlinear material with specific optical properties.
    • Upconversion allows detection of infrared radiation at shorter wavelengths.

    Purpose of the Study:

    • To review the properties of birefringently phase-matched parametric upconversion using proustite.
    • To analyze the potential of upconversion detection systems for various sensor applications.
    • To determine the suitability of upconversion for different imaging scenarios.

    Main Methods:

    • Review of theoretical properties of parametric upconversion.
    • Analysis of photon conversion efficiency, field-of-view limitations, spectral acceptance bandwidths, and resolution.
    • Examination of competitive potential in sensor applications.

    Main Results:

    • Upconversion of 10-mu radiation to wavelengths <1 mu was analyzed.
    • Photon conversion efficiency, field-of-view, spectral bandwidth, and resolution were discussed.
    • Upconversion is suitable for low-duty-cycle, small field-of-view laser imaging.

    Conclusions:

    • Upconversion detection is a specialized technology.
    • It is well-suited for specific laser illumination imaging systems.
    • It is unlikely to be competitive for thermal imagery detection.