Laser beam analyser0 pages

Sintec Optronics Technology Pte Ltd

Sintec Optronics Technology Pte Ltd
10 Bukit Batok Crescent #07-02 The Spire Singapore 658079
Tel: +65 63167112 Fax: +65 63167113

Measurement of Laser Beam Profile and Propagation Characteristics
1. Laser Beam Measurement Capabilities
Laser beam profiling plays an important role in such applications as laser welding, laser focusing, and
laser free-space communications. In these applications, laser profiling enables to capture the data
needed to evaluate the change in the beam width and determine the details of the instantaneous beam
shape, allowing manufacturers to evaluate the position of hot spots in the center of the beam and the
changes in the beam’s shape.
Digital wavefront cameras (DWC) with software can be used for measuring laser beam propagation
parameters and wavefronts in pulsed and continuous modes, for lasers operating at visible to farinfrared wavelengths:
- beam propagation ratio M²;
- width of the laser beam at waist w0;
- laser beam divergence angle θ x, θ y;
- waist location z-z0;
- Rayleigh range zRx, zRy;
- Ellipticity;
- PSF;
- Wavefront;
- Zernike aberration modes.
These parameters allow:
- controlling power density of your laser;
- controlling beam size, shape, uniformity, focus point and divergence;
- aligning delivery optics;
- aligning laser devices to lenses;
- tuning laser amplifiers.
Accurate knowledge of these parameters can strongly affect the laser performance for your application,
as they highlight problems in laser beams and what corrections need to be taken to get it right.

Figure 1. Characteristics of a laser beam as it passes through a focusing lens.

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