How is mode locking achieved?
Active mode locking involves the periodic modulation of the resonator losses or of the round-trip phase change, achieved e.g. with an acousto-optic or electro-optic modulator, a Mach–Zehnder integrated-optic modulator, or a semiconductor electroabsorption modulator.
What is laser gain bandwidth?
Definition: the width of the optical frequency range in which significant gain is available from an amplifier. Alternative term: amplification bandwidth. German: Verstärkungsbandbreite. Categories: laser devices and laser physics, optical amplifiers.
Why is optical resonator needed in laser?
lasers. An optical resonator is needed to build up the light energy in the beam. The resonator is formed by placing a pair of mirrors facing each other so that light emitted along the line between the mirrors is reflected back and forth.
What is the Q switch in the laser?
A quality-switched laser (Q-Switched) is a non-invasive laser that creates high-intensity pulsed beam light. The Q-Switched laser beam pulses last a mere billionth of a second. 1 The energy emitted from a Q-switched laser is concentrated into very powerful pulses.
What is a Q-switched laser explain various techniques used in Q switching?
Q switching is a technique for obtaining energetic short (but not ultrashort) light pulses from a laser by modulating the intracavity losses and thus the Q factor of the laser resonator. The technique is mainly applied for the generation of nanosecond pulses of high energy and peak power with solid-state bulk lasers.
How do you stabilize a laser?
Passive Laser Stabilization
- The frequency of a laser can be stabilized via optical feedback from a stable reference cavity.
- Synchronization of two mode-locked lasers is possible via cross-phase modulation in a Kerr medium, in which the intracavity pulses of both lasers meet.