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Related Concept Videos

Parallel Resonance01:23

Parallel Resonance

The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Concept of Resonance and its Characteristics01:19

Concept of Resonance and its Characteristics

If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not immune...
Series Resonance01:17

Series Resonance

The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
RLC Circuit as a Damped Oscillator01:30

RLC Circuit as a Damped Oscillator

An RLC circuit combines a resistor, inductor, and capacitor, connected in a series or parallel combination.
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
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:

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Fabrication and Characterization of Superconducting Resonators
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Published on: May 21, 2016

Unstable resonator with reduced output coupling.

Carsten Pargmann1, Thomas Hall, Frank Duschek

  • 1German Aerospace Center, Institute of Technical Physics, Hardthausen, Germany. carsten.pargmann@dlr.de

Applied Optics
|June 23, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces the unstable resonator with reduced output coupling (URROC) design, enabling independent adjustment of magnification and output coupling for improved laser beam quality and power extraction.

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Area of Science:

  • Laser Physics
  • Optical Engineering

Background:

  • Laser resonator properties depend on magnification.
  • High magnification yields high output coupling and beam quality.
  • Low output coupling with good beam quality is often desirable.

Purpose of the Study:

  • To develop a resonator design for independent control of magnification and output coupling.
  • To achieve good beam quality and high power extraction in lasers with large, low-gain media.

Main Methods:

  • Implementing magnification fractions of outcoupled radiation reflected back into the cavity.
  • Utilizing a confocal unstable resonator with a specialized output mirror.
  • Numerical and experimental examination of the URROC design.

Main Results:

  • The unstable resonator with reduced output coupling (URROC) allows independent adjustment of magnification and output coupling.
  • Achieved good beam quality and high power extraction.
  • Demonstrated feasibility in a chemical oxygen iodine laser.

Conclusions:

  • The URROC design offers a flexible solution for optimizing laser resonator performance.
  • This design is particularly beneficial for lasers requiring both high beam quality and efficient power extraction from low-gain media.