L20 Flashcards
Relaxation oscillations
- occur when the pump rate abruptly increases,
- leading to damped oscillations in intensity and gain until new steady-state values are reached.
Gain clamping
- Occurs when the pump rate increases gradually above the threshold
- leading to a rapid increase in light intensity
Damped harmonic oscillator
Name an example and details
- A laser cavity behaves as a damped harmonic oscillator
- Overshoot and decay are influenced by the cavity and gain medium structure.
Spatial hole burning
Is the distortion of the gain shape caused by saturation effects of a standing wave.
i dont understand what this is about
Purcell effect
Is the enhancement of spontaneous emission rates in atoms within a resonant cavity.
Pulsed laser
Pulsed lasers produce bursts of light by controlling the population inversion and photon flux.
Q-switching
Modulating losses with an active or passive element to generate high-energy pulses.
Femtosecond pulses
Femtosecond pulses: Extremely short laser pulses, achieved through mode locking techniques.
Kerr-lens mode-locking
Nonlinear phase delay in a medium causes self-focusing, used for passive mode locking of lasers.
non-linear relevant?
Intra-cavity self-phase-modulation
High optical intensity causes a nonlinear phase delay, described as a nonlinear change in the refractive index.
belongs to non-linear optics?
Nobel Prize 2023
Awarded for generating attosecond pulses of light to study electron dynamics in matter.
Laser types
Examples of laser types include:
- UV-VIS lasers
- IR lasers
- CO2 lasers
- Free Electron lasers
Laser gain bandwidth
add context?
Laser gain bandwidth varies for different solid-state materials.
Lasing media
Lasing media for compact solid-state lasers include edge-emitting and surface-emitting configurations.
Material challenges
add context!
Challenges in creating blue laser diodes involve high melting temperatures and lattice constant mismatches.
