A laser cavity, also known as an optical cavity, is a set of mirrors that forms a standing wave cavity resonator for light waves, providing the necessary feedback to sustain laser oscillation. It plays a crucial role in determining the laser's mode structure, frequency stability, and output power by amplifying the light through stimulated emission within the gain medium placed inside the cavity.

Laser Cavity

laser cavity

An optical cavity is a set of mirrors that forms a closed path for light, allowing it to bounce back and forth to enhance its intensity and coherence. This setup is crucial in devices like lasers and interferometers, where controlled light amplification and precise measurement are essential.

optical cavity

standing wave cavity resonator

Light waves are electromagnetic waves that are visible to the human eye and are responsible for the perception of color. They exhibit behaviors such as reflection, refraction, diffraction, and interference, which are fundamental to understanding optics and various technological applications.

light waves

necessary feedback

laser oscillation

Mode structure refers to the spatial and temporal distribution of energy or information in a resonant system, such as optical cavities or waveguides, determining how different frequencies or wavelengths propagate. Understanding mode structure is crucial for optimizing system performance in applications like lasers, telecommunications, and quantum computing.

mode structure

Frequency stability refers to the ability of a system or device to maintain a constant frequency over time despite external or internal disturbances. It is crucial in applications such as telecommunications, power systems, and scientific instruments, where precise frequency control is essential for optimal performance and reliability.

frequency stability

Output power refers to the amount of energy per unit time that is delivered by a system, device, or process. It is a crucial parameter in evaluating the performance and efficiency of energy conversion systems like engines, generators, and electronic devices.

output power

Stimulated emission is a process where an incoming photon induces an excited electron to drop to a lower energy level, emitting a second photon with the same phase, frequency, polarization, and direction as the incoming photon. This principle is fundamental to the operation of lasers, where it leads to the amplification of light.

stimulated emission

A gain medium is a material that amplifies light by stimulated emission, a critical component in the operation of lasers and optical amplifiers. The properties of the gain medium determine the wavelength, efficiency, and power output of the laser system.

Your Courses

Your Lessons