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Related Concept Videos

Passive Filters01:27

Passive Filters

Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff frequency...
Bandpass Sampling01:17

Bandpass Sampling

In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2. The spectrum...
Active Filters01:25

Active Filters

Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...

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Related Experiment Video

Updated: Jul 9, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
12:08

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

Grating-based transmission bandpass filters using dispersion-matched mode conversion.

J Canning, D Moss

    Optics Letters
    |December 18, 2007
    PubMed
    Summary

    A novel narrow-bandpass filter was created using Bragg-grating assisted mode conversion. This filter shows promise for improving wavelength-division multiplexing systems.

    Area of Science:

    • Photonics
    • Optical Engineering
    • Materials Science

    Background:

    • Wavelength-division multiplexing (WDM) systems require efficient and selective optical filters.
    • Existing filtering technologies face limitations in performance and integration.

    Purpose of the Study:

    • To demonstrate a narrow-bandpass optical filter with a high signal-to-noise ratio.
    • To explore the application of Bragg-grating assisted mode conversion in filter design.
    • To assess the filter's suitability for WDM systems.

    Main Methods:

    • Fabrication of a tapered waveguide with an integrated Bragg grating.
    • Utilizing mode conversion phenomena for spectral filtering.
    • Characterization of the filter's performance, including signal-to-noise level.

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    Writing Bragg Gratings in Multicore Fibers

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    Last Updated: Jul 9, 2026

    Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
    12:08

    Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

    Published on: July 18, 2015

    Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy
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    Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

    Published on: July 25, 2022

    Writing Bragg Gratings in Multicore Fibers
    08:48

    Writing Bragg Gratings in Multicore Fibers

    Published on: April 20, 2016

    Main Results:

    • Successful demonstration of a narrow-bandpass filter.
    • Achieved a signal-to-noise level of 15 dB.
    • The filter utilizes Bragg-grating assisted mode conversion.

    Conclusions:

    • Bragg-grating assisted mode conversion is an effective method for creating narrow-bandpass filters.
    • The demonstrated filter has significant potential for enhancing WDM systems.
    • Further research can optimize filter performance and integration.