This algorithm calculates output power and the beam quality (M^{2})
depending on the beam radius, pump/resonator configuration,
and special optical elements, such as, irises and Gaussian
output couplers.
These factors allow the calculation of the population inversion,
in the laser crystal, based on a finite volume discretization grid.
The time dynamic behavior of the laser is simulated by
rate equations for different high and low order Gaussian modes.
ASLD built-in Ray-tracing program can accurately simulate
pump configuration. The following effects are taken into account:
•
Absorption of light
•
Scattering effects
•
Reflection of light
An efficient algorithm is used for the computation of
light scattering.
Thermal and structural analysis of laser crystals are needed
to calculate thermal lensing effects.
ASLD contains a fast and highly accurate 3-dimensional
Finite Element (FE) solver. It can be applied for very long or
thin lasers crystals and small pump lights with small pump radius
as well.
It also includes a complete 3-dimensional time dynamic analysis
(by FE) which is required for the simulation of thermal
lensing effects of lasers with pulsed pump light.
A user friendly flexible graphical user interface (GUI)
allows a flexible design of cooling and geometry of the laser crystal.
The Finite Element solver takes into account the frequency
dependent absorption of the laser crystal and allows to set
spectrum of pump light.
ASLD analyzes the stability of a solid-state laser and calculates
its beam radius depending on the resonator configuration
and thermal lensing effects .
Description
ASLD THERMAL LENSING ANALYSIS
© ASLD 2018
ASLD enables the analysis of pulse energy, pulse width,
beam quality and pulse frequency of both active and passive
Q-switches. ASLD also includes an accurate algorithm accounting
for the physical effects of passive Q-switching with a saturable
absorber. The physical properties of the saturable absorber,
like ground-state and excited-state absorption cross-sections,
are accounted for this purpose.
Mode competition in the resonator can also be simulated by a
dynamic mode analysis of both low and high Gauss modes.
ASLD provides a tool for parameter analysis in order to
optimize the design of a laser resonator. The output power,
beam quality and stability diagram of a laser resonator can be
plotted for a range of input parameters:
•
Power of pump light
•
Pump frequency shift
•
Reflectivity of the output mirror
ASLD is capable of calculating the impact of each input parameter
variations on the above mentioned output quantities.
The parameter analysis uses advanced algorithms for minimal
computation time and saves resonator optimization costs.
ASLD PUMP SOURCE ANALYSIS
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ASLD OUTPUT POWER AND BEAM QUALITY ANALYSIS
(DYNAMIC MULTI-MODE ANALYSIS DMA)
ASLD LASER STABILITY AND BEAM RADIUS ANALYSIS
ACTIVE AND PASSIVE Q-SWITCHES AND SESAM
PARAMETER ANALYSIS