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> 
 > 
 > Features of ASLD Version 6.3.
> ASLD is a software to design and simulate solid-state laser resonators and amplifiers.
> The following diagram shows an overview of the modules of ASLD:
> 
> 1.ASLD FEA (Finite Element Analysis) and Gauss Mode Analysis
> This module calculates thermal lensing effect inside a laser crystal. The result is used to calculate beam radius and stability of a laser resonator. The simulation includes:
> -time dynamic temperature calculation,
> -deformation, stress calculation,
> -birefringence calculation,
> -Jones matrix calculation for depolarization calculation,
> -simulation of gain guiding effects.
> 
> 2.ASLD DMA (Dynamic Mode Analysis)
> This module calculates output power and beam quality of a laser resonator. Population inversion is discretized on a 3-dimensional finite volume grid such that mode competition of high and low order modes can be calculated. It includes
> -3-level and 4-level rate equation calculation,
> -simulation of up-conversion and energy transfer,
> -simulation of intracavity frequency doubling,
> -simulation of active and passive Q-switching.
> -simulation of Pocklet’s cell as active Q-switch including polarization effect
> 
> 3.ASLD Amplifier (amplifier simulation)
> This module calculates laser amplification of cw-laser signals, short pulses, ultra-short pulses, and chirped pulse amplification. It includes
> -beam quality calculation,
> -far field calculation,
> -output power calculation,
> -pulse energy calculation.
> The simulation techniques are
> -Gauss beam amplification
> -spectral method of plane waves and other FFT based methods
> 
> 4.ASLD Raytracing (design and simulation of pump source)
> This module can be used to design end and side pumping of laser crystals. Both, diode and flashlight pumping can be considered. It includes
> -simulation of spectrum,
> -simulation of saturation effects.
> 
> The pump light can be a pulsed pumping.
> Simulation of pumplight using super-Gaussian functions is possible too.
> The software contains a material data file for different laser crystals including absorption spectrum and wavelength and temperature dependent stimulated emission cross sections for certain crystals like Nd:YAG.
> 
> The software includes parallel computation until 6 cores in order to decrease computational time.
 > 
 >

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