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Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Related Experiment Video

Updated: Jun 20, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Published on: June 8, 2018

Generation of dark solitons under a cw background using waveguide electro-optic modulators.

W Zhao1, E Bourkoff

  • 1Department of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA.

Optics Letters
|September 22, 2009
PubMed
Summary

Researchers developed a new method to generate dark optical solitons using electro-optic modulators. These solitons can be amplified in optical fibers, enabling the study of soliton effects.

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Area of Science:

  • Nonlinear optics
  • Fiber optics
  • Quantum optics

Background:

  • Dark solitons are fundamental nonlinear phenomena in optical systems.
  • Generating and observing dark solitons in fibers is challenging.

Purpose of the Study:

  • To propose a novel method for generating dark solitons on a continuous wave (cw) background.
  • To enable the observation of soliton effects in optical fibers.

Main Methods:

  • Utilizing broadband guided-wave electro-optic modulators for pulse generation.
  • Amplifying the generated pulses via stimulated Raman scattering.

Main Results:

  • Successfully generated dark solitons with a cw background.
  • Demonstrated amplification of the generated pulses.

Conclusions:

  • The proposed method provides a viable technique for dark soliton generation.
  • Amplification facilitates the observation of soliton dynamics in optical fibers.