WorksheetsIntroduction to Laser Physics Final Exam
Total questions: 15
Worksheet time: 30mins
Consider an assembly of N1 and N2 atoms per unit volume with energies E1 and E2 (E2 > E1) is irradiated with photons of density ρν = N hυ, where [N] is the number of photons of frequency ν per unit volume. Then Employing the condition of thermal equilibrium ,Show that A21 = B21(8πhν3/c3) B21, and A21 are known as Einstein coefficients
Clearly explain attaining Condition of Population Inversion with figures
Clearly describe types of Lasers and their Operation and give at least two examples for each
Explain properties of Laser Radiation
What is the region enclosed by the optical cavity called?
A He-Ne laser has a gas discharge temperature of 400 K. The atomic mass of Ne (which is responsible for lasing) is kg. If the lasing wavelength is 630 nm, calculate the line shape broadening due to Doppler effect.
Explain methods for Pulsed-Laser Operation
What are the basic principles in Light-Matter Interactions in Lasers
Clearly explain Critical Laser Components
Which of the following can be used for generation of laser pulse?
Ruby laser
Carbon dioxide laser
Helium neon laser
Nd- YAG laser
Which of the following can be used in a vibrational analysis of structure?
Laser
Maser
Quarts
Electrical waves
__________________ in the laser occurs when photon colliding with an excited atom causes the stimulated emission of a second photon.
Light amplification
Attenuation
Dispersion
Population inversion
Which process gives the laser its special properties as an optical source?
Dispersion
Stimulated absorption
Spontaneous emission
Stimulated emission
What is the need to achieve population inversion?
To excite most of the atoms
To bring most of the atoms to ground state
To achieve stable condition
To reduce the time of production of laser
What is physics?
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