Laser Technology Unit I 16.12.2024

In 1917, __________ laid the foundation for the laser when he introduced the concept of stimulated emission

• Newton
• Scholaw
• Tesla
• Einstein

Laser is

• Perfectly monochromatic source
• Partially monochromatic source
• Perfectly polychromatic source
• Only Red colour source

Atom+Photon --> Atom* . This represents

• Stimulated Absorption
• Stimulated Emission
• Spontaneous Emission
• Emission

Atom* --> Atom+Photon. This represents

• Stimulated Absorption
• Stimulated Emission
• Spontaneous Emission
• Induced absorption

Optical pumping is used in solid-state lasers such as

• He-Ne laser
• ruby lasers
• CO2
• Argon

Conditions to achieve laser Emission

• Active medium, Pumping source, optical resonator
• Active medium, Pumping source, optical light
• Xenon flash lamp, Pumping source, optical light
• Active medium, Power, optical resonator

What is the relationship between B21 and B12?

• equal
• not equal
• greater than
• lesser than

Three components of laser (more than one option is correct)

• Active medium

• pumping

• optical resonator

• Threshold factor

The gain medium of a laser depends on the ................................ in different electronic levels

• Power input
• population densities
• Energy of photon
• ground state atoms

6.625 x 10^-34 Js is

• Boltzman constant
• Planck's constant
• Velocity of light
• Rydberg constant