5 Questions
What type of mode involves storing energy in the laser material during pumping and suddenly releasing it in a single, short burst?
Q-switching mode
Which mode of operation results in irregularities in peak power, pulse width, and frequency of occurrence?
Normal pulse mode
In which mode does the output power remain almost constant when pumped continuously?
Continuous mode
Which process greatly increases peak power and removes irregularities in output by switching the reflectivity of the output mirror?
Q-switching
What happens when a laser is excited by a pulse of energy in terms of its output pulse?
It coincides with the pumping pulse
Study Notes
Laser Operation Modes
- Lasers can operate in either a continuous (CW) or a single-pulsed mode.
- Continuous mode: pumped continuously, producing a constant output power.
- Pulsed mode: pumped by a pulse of energy, emitting an output pulse that coincides with the pumping pulse.
Normal Pulse Mode
- Output power is irregular in peak power, pulse width, and frequency of occurrence.
- Irregularities are due to population inversion.
Q-Switching Mode
- Energy is stored in the laser material during pumping in the form of atoms in the upper laser level.
- Energy is suddenly released in a single, short burst.
- Involves switching the reflectivity of the output mirror from a high to a low value at a specific instant.
- Peak power is greatly increased in Q-switching mode.
Test your knowledge on the different operational modes of lasers, including continuous wave (CW), single-pulsed mode, and normal pulse mode. Learn about how lasers can be pumped continuously or by a pulse of energy, affecting the output power and characteristics.
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