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Related Concept Videos

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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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

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Published on: August 5, 2013

Generating arbitrary optical signal constellations using microring resonators.

Yossef Ehrlichman1, Ofer Amrani, Shlomo Ruschin

  • 1School of Electrical Engineering, Faculty of Engineering, Tel-Aviv University, Tel-Aviv, Israel, 69978. syos@eng.tau.ac.il

Optics Express
|March 14, 2013
PubMed
Summary
This summary is machine-generated.

Two microresonators in series enable Quadrature Amplitude Modulation (QAM) signal generation by independently optimizing amplitude and phase. This method effectively covers the entire I-Q space for advanced optical modulation.

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Area of Science:

  • Photonics
  • Optical Communications
  • Signal Processing

Background:

  • Quadrature Amplitude Modulation (QAM) is crucial for high-capacity optical communication systems.
  • Existing methods for QAM signal generation can be complex and require precise control.
  • Microresonator-based devices offer potential for miniaturized and efficient optical modulation.

Purpose of the Study:

  • To demonstrate a novel approach for generating QAM signals using mutually uncoupled microresonators.
  • To show that independent optimization of microresonators can achieve full I-Q space coverage.
  • To validate the proposed method through simulation of 16-QAM generation.

Main Methods:

  • Utilizing two mutually uncoupled microresonators configured in series.
  • Independently optimizing the first microresonator for amplitude modulation.
  • Independently optimizing the second microresonator for phase modulation.

Main Results:

  • The series microresonator configuration successfully covers the entire In-phase and Quadrature (I-Q) space.
  • The independent optimization strategy allows for effective amplitude and phase control.
  • Simulation successfully demonstrated the generation of 16-QAM signals.

Conclusions:

  • A novel and effective method for QAM signal generation using two series microresonators is presented.
  • This approach simplifies QAM realization by enabling independent amplitude and phase modulation.
  • The demonstrated 16-QAM generation shows the potential for practical applications in optical communication.