Related Experiment Video
Updated: Jun 15, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Unstable resonator mode control in a transverse flow dye laser
Applied Optics
|March 4, 2010
Summary
Researchers achieved a 2x diffraction-limited beam from a high power transverse flow dye laser. Beam divergence, influenced by sound waves, can be externally compensated for improved laser performance.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- High power lasers are crucial for various scientific applications.
- Controlling beam quality in transverse flow dye lasers presents significant challenges.
Purpose of the Study:
- To obtain a diffraction-limited beam from a high power transverse flow dye laser.
- To investigate methods for controlling beam divergence.
Main Methods:
- Utilized correcting optics to shape the laser beam.
- Employed a sound wave to influence beam divergence in the direction parallel to flow.
Main Results:
- Successfully generated a 2x diffraction-limited beam.
- Demonstrated that sound waves control beam divergence along the flow direction.
- Showed that this divergence can be externally compensated.
Conclusions:
- Correcting optics are effective in improving beam quality for high power transverse flow dye lasers.
- Acoustic control offers a novel method for managing beam divergence.
- External compensation strategies can further enhance laser beam characteristics.
Related Concept Videos
01:30Oscillations 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
01:28Standing Waves in a Cavity
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are 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...
01:30RLC 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...
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...