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Related Concept Videos

Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

272
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:
272
Parallel Resonance01:23

Parallel Resonance

224
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:
224
Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

324
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...
324
Series Resonance01:17

Series Resonance

196
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...
196

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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Research on Optical Fiber Ring Resonator Q Value and Coupling Efficiency Optimization.

Shengkun Li1, Xiaowen Tian1, Sining Tian1

  • 1School of Instrument and Electronics, North University of China, Taiyuan 030051, China.

Micromachines
|September 28, 2023
PubMed
Summary

Optimizing the coupling efficiency of fiber ring resonators enhances the scale factor in resonant fiber gyroscopes. The highest scale factor is achieved near 0.75 coupling efficiency in an under-coupled state.

Keywords:
coupling efficiencyfiber ring resonatorresonant fiber gyroscopescale factor

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Area of Science:

  • Photonics and optical sensing
  • Inertial navigation systems

Background:

  • The scale factor of resonant fiber gyroscopes is crucial for their performance.
  • Fiber ring resonators are key sensitive units in these gyroscopes.
  • Coupling efficiency directly impacts the gyroscope's scale factor.

Purpose of the Study:

  • To analyze the influence of coupling efficiency on the resonant fiber gyroscope's scale factor.
  • To identify factors affecting coupling efficiency.
  • To experimentally validate methods for enhancing the scale factor.

Main Methods:

  • Analysis of coupling efficiency in fiber ring resonators.
  • Investigation of coupler splitting ratio and cavity loss effects.
  • Experimental testing of coupling efficiency versus scale factor.

Main Results:

  • Coupling efficiency is dependent on coupler splitting ratio and cavity loss.
  • Maximum scale factor occurs at approximately 0.75 coupling efficiency under-coupled.
  • Validated theoretical and experimental basis for scale factor enhancement.

Conclusions:

  • Optimizing coupling efficiency is vital for improving resonant fiber gyroscope performance.
  • A coupling efficiency around 0.75 offers the highest scale factor.
  • Findings support applications in diverse environments including sea, land, air, and space.