Laser Definitions Quiz

Laser Fundamentals

• LASER stands for Light Amplification by Stimulated Emission of Radiation.

Laser Light Characteristics

• Laser light is different from ordinary light because it is coherent, meaning it has a single frequency and a fixed phase relationship.
• Laser light is intense, directional, and focused due to the stimulated emission of photons, which are in phase with each other.

Laser Safety

• The retina poses a hazard from laser light, as it can cause damage to the eye.

Laser Components

• The pumping system in a laser raises the lasing medium to a higher energy state, preparing it for stimulated emission.

Laser Classification

• Lasers are commonly designated by their wavelength, such as ultraviolet, visible, or infrared.

Laser Pulse Duration

• Ultrashort laser pulses have extremely short durations, often measured in femtoseconds (10^-15 seconds).

Laser Description

• A laser is described by its wavelength, power output, and pulse duration.

Lasing Medium

• In some lasers, an energy source, such as a flash lamp, raises the lasing medium to the metastable or lasing state, enabling stimulated emission.