Related Experiment Video
Updated: Jun 12, 2026
09:46
Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
Published on: August 8, 2025
Unstable ring resonator with a compact output beam: description and experimental evaluation
Applied Optics
|June 10, 2010
Summary
A new unstable resonator design enables efficient power extraction from low-gain lasers, producing a high-quality rectangular beam. This novel resonator demonstrates good performance even with slight mirror misalignment.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Unstable resonators are crucial for high-power lasers.
- Efficient power extraction from low-gain media remains a challenge.
Purpose of the Study:
- To describe a novel unstable resonator design.
- To analyze its operation with a carbon dioxide (CO2) laser.
- To evaluate its efficiency and beam quality.
Main Methods:
- Utilized a novel unstable resonator configuration.
- Integrated with a carbon dioxide (CO2) laser system.
- Investigated beam characteristics and performance under misalignment.
Main Results:
- Achieved efficient power extraction from a low-gain medium.
- Observed a solid rectangular laser mode with excellent beam quality (1.1).
- Demonstrated stable operation with low sensitivity to mirror misalignment.
Conclusions:
- The novel unstable resonator is effective for CO2 lasers.
- It facilitates efficient power extraction and produces a high-quality rectangular beam.
- The design offers robustness against minor misalignments.
Related Concept Videos
01:24Characteristics 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:
01:23Parallel 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:
01:17Design 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...
Starting with a fixed...