Parameters of Laser Source
Parameters of Beam Delivery
Calculation Results
Focal Spot Size
µm
Depth of Field
mm
Avg. Power Density
kW/cm<sup>2</sup>
Peak Power Density
How do I use this laser spot size calculator, and what optical configuration does it assume?
This calculator models the most common focusing configuration used in laser scanning systems. It assumes a standard F-theta lens (also called a scan lens or field lens) mounted after galvanometer scanners. Simply modify the input parameters on the left side, and the dark blue results section will instantly display all calculated focal parameters including spot size, power density, and beam characteristics.
What specific applications is this calculator designed for, and are there any limitations I should be aware of?
This tool is optimized for laser marking, engraving, and micromachining systems using galvanometer-based beam delivery. It provides accurate calculations for Gaussian beams with M² values from 1 to 3. However, for non-Gaussian beam profiles, extremely high M² values, or specialized optical configurations, additional factors may need consideration beyond this calculator's scope.
How to control the output power of laser source?
The typical 3 control methods are: adjusting the pump power; duty cycle modulation, and change the intensity of dye or chemical.
Five laser beam delivery systems
By function, the laser beam delivery systems can be classified into focusing, collimation, beam expansion, deflection, and splitting.
How do pulse energy, pulse width, and repetition rate affect the quality of material processing?
The key parameters of a pulsed laser—pulse width, repetition rate, and pulse energy—each affect material processing quality in different ways.
