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Related Concept Videos

Oscillations In An LC Circuit01:30

Oscillations In An LC Circuit

An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Improved optical local-oscillator isolation using multiple acousto-optic modulators and frequency diversity.

J F Holmes1, F Amzajerdian, J M Hunt

  • 1Department of Applied Physics and Electrical Engineering, Oregon Graduate Center, 19600 N.W. Von Neumann Drive, Beaverton, Oregon 97006-1999, USA.

Optics Letters
|September 11, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed a new technique for ultrahigh isolation in heterodyne systems. This method significantly reduces optical feedback, achieving over 200 dB isolation for improved signal integrity.

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Area of Science:

  • Optoelectronics
  • Optical Communications
  • Signal Processing

Background:

  • Heterodyne systems require high isolation between optical local oscillators and transmitters to prevent signal degradation.
  • Optical feedback can lead to instability and reduced performance in sensitive communication systems.

Purpose of the Study:

  • To present a novel technique for achieving ultrahigh isolation in heterodyne optical systems.
  • To experimentally validate the effectiveness of the proposed isolation method.

Main Methods:

  • Development of a specialized technique to enhance isolation between system components.
  • Experimental setup designed to measure optical signal levels and isolation performance.

Main Results:

  • Achieved ultrahigh isolation between the optical local oscillator and the transmitter.
  • Demonstrated an optical feedback signal level exceeding 200 dB below the transmitted power.

Conclusions:

  • The developed technique effectively provides superior isolation in heterodyne systems.
  • This advancement is crucial for enhancing the performance and stability of optical communication.